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Electrocatalytic activity of non-precious metal catalyst Co-N/C toward oxygen reduction reaction 认领 引用 被引量：4
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作者 Yu Jun Si Chang Guo Chen +1 位作者 Wei Yin Hui Cai 《Chinese Chemical Letters》 SCIE CAS 2010年第8期983-986,共4页
Metallic cobalt was deposited on acetylene black to synthesize a composite Co/C by chemical reduction method.A platinumfree electrocatalyst Co-N/C（800） for oxygen reduction reaction（ORR） was synthesized by mixing ... Metallic cobalt was deposited on acetylene black to synthesize a composite Co/C by chemical reduction method.A platinumfree electrocatalyst Co-N/C（800） for oxygen reduction reaction（ORR） was synthesized by mixing the composite Co/C with urea and heat-treating at 800℃.The results from linear sweep voltammograms indicated that the Co-N/C（800） is active to ORR.Theβ-Co and cobalt oxides are not the active site of the catalyst Co-N/C.However,the existence of cobalt facilitated the modification of nitrogen to carbon black and led to the formation of active site of catalyst Co-N/C（800）. 展开更多
关键词 Oxygen reduction reaction Electrocatalyst Non-precious metal Active site
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A non-precious metal catalyst for oxygen reduction prepared by heat-treating a mechanical mixture of carbon black,melamine and cobalt chloride 认领 引用 被引量：3
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作者 Yu-Jun Si Zhong-Ping Xiong +2 位作者 Chang-Guo Chen Ping Liu Hui-Juan Wu 《Chinese Chemical Letters》 SCIE CAS CSCD 2013年第12期1109-1111,共3页
A non-precious metal catalyst CoMe]C for the oxygen reduction reaction is prepared by heat-treating a mechanical mixture of carbon black, melamine and cobalt chloride at 600 under nitrogen atmosphere for 2 h. The cata... A non-precious metal catalyst CoMe]C for the oxygen reduction reaction is prepared by heat-treating a mechanical mixture of carbon black, melamine and cobalt chloride at 600 under nitrogen atmosphere for 2 h. The catalytic activity of CoMe/C is characterized by the electrochemical linear sweep voltammetry technique. The onset reduction potential of the catalyst is 0.55 V （vs. SCE） at a scanning rate of 5 mV/s in 0.5 mol/L H2SO4 solution. The formation of the ORR activity sites of CoMe/C is facilitated by metallic β- cobalt. 展开更多
关键词 Oxygen reduction Non-precious metal catalyst Preparation Mechanical method
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Influence of counter electrode material during accelerated durability test of non-precious metal electrocatalysts in acidic medium 认领 引用 被引量：3
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作者 李佳 刘会园 +2 位作者 吕洋 郭新闻 宋玉江 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第7期1109-1118,共10页
Significant progress has been made in the development of non-precious metal electrocatalysts （NPMEs） during the past decade. Correspondingly, there is an urgent demand for an appropriate measurement method to be est... Significant progress has been made in the development of non-precious metal electrocatalysts （NPMEs） during the past decade. Correspondingly, there is an urgent demand for an appropriate measurement method to be established for the reliable evaluation of NPMEs. In this study, platinum and graphite counter electrodes were used to investigate the impact of counter electrode material on the accelerated durability testing （ADT） of NPMEs in acidic medium. Platinum used as the coun- ter electrode in a traditional three-electrode electrochemical cell was found to dissolve in acidic medium and re-deposit on NPME coated on the working electrode during ADT. Such re-deposition causes the oxygen reduction reaction （ORR） performance of NPMEs to remarkably improve, and thus will seriously mislead our judgment of NPMEs if we are unaware of it. The phenomenon can be avoided using a graphite counter electrode. 展开更多
关键词 Non-precious metal electrocatalystPlatinum counter electrodeGraphite counter electrodeAccelerated durability testAcid medium
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Synthesis of dual-doped non-precious metal electrocatalysts and their electrocatalytic activity for oxygen reduction reaction 认领 引用
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作者 Li Xu Guoshun Pan +3 位作者 Xiaolu Liang Guihai Luo Chunli Zou Gaopan Chen 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2014年第4期498-506,共9页
The pyrolyzed carbon supported ferrum polypyrrole （Fe-N/C） catalysts are synthesized with or without selected dopants, p-toluenesulfonic acid （TsOH）, by a facile thermal annealing approach at desired temperature f... The pyrolyzed carbon supported ferrum polypyrrole （Fe-N/C） catalysts are synthesized with or without selected dopants, p-toluenesulfonic acid （TsOH）, by a facile thermal annealing approach at desired temperature for optimizing their activity for the oxygen reduction reaction （ORR） in O2-saturated 0.1 mol/L KOH solution. The electrochemical techniques such as cyclic voltammetry （CV） and rotating disk electrode （RDE） are employed with the Koutecky-Levich theory to quantitatively obtain the ORR kinetic constants and the reaction mechanisms. It is found that catalysts doped with TsOH show significantly improved ORR activity relative to the TsOH-free one. The average electron transfer numbers for the catalyzed ORR are determined to be 3.899 and 3.098, respectively, for the catalysts with and without TsOH-doping. The heat-treatment is found to be a necessary step for catalyst activity improvement, and the catalyst pyrolyzed at 600℃ gives the best ORR activity. An onset potential and the potential at the current density of -1.5 mA/cm2 for TsOH-doped catalyst after pyrolysis are 30 mV and 170 mV, which are more positive than those without pyrolized. Furthermore, the catalyst doped with TsOH shows higher tolerance to methanol compared with commercial Pt/C catalyst in 0.1 mol/L KOH. To understand this TsOH doping and pyrolyzed effect, X-ray diffraction （XRD）, scanning electron microscope （SEM） and X-ray photoelectron spectroscopy （XPS） are used to characterize these catalysts in terms of their structure and composition. XPS results indicate that the pyrrolic-N groups are the most active sites, a finding that is supported by the correspondence between changes in pyridinic-N content and ORR activity that occur with changing temperature. Sulfur species are also structurally bound to carbon in the forms of C-Sn-C, an additional beneficial factor for the ORR. 展开更多
关键词 non-precious metal electrocatalyst dual-dopant heat-treatment oxygen reduction reaction polymer electrolyte membrane fuel cell
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Regulating non-precious transition metal nitrides bifunctional electrocatalysts through surface/interface nanoengineering for air-cathodes of Zn-air batteries 认领 引用 被引量：4
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作者 Qixing Du Yanmei Gong +4 位作者 Muhammad Arif Khan Daixin Ye Jianhui Fang Hongbin Zhao Jiujun Zhang 《Green Energy & Environment》 SCIE EI CAS CSCD 2022年第1期16-34,共19页
Zn-air batteries(ZABs),especially the secondary batteries,have engrossed a great interest because of its high specific energy,economical and high safety.However,due to the insufficient activity and stability of bifunc... Zn-air batteries(ZABs),especially the secondary batteries,have engrossed a great interest because of its high specific energy,economical and high safety.However,due to the insufficient activity and stability of bifunctional electrocatalysts for air-cathode oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)processes,the practical application of rechargeable ZABs is seriously hindered.In the effort of developing high active,stable and cost-effective electrocatalysts,transition metal nitrides(TMNs)have been regarded as the candidates due to their high conductivity,strong corrosion-resistance,and bifunctional catalytic performance.In this paper,the research progress in TMNs-based material as ORR and OER electrocatalysts for ZABs is discussed with respect to their synthesis,chemical/physical characterization,and performance validation/optimization.The surface/interface nanoengineering strategies such as defect engineering,support binding,heteroatom introduction,crystal plane orientation,interface construction and small size effect,the physical and chemical properties of TMNs-based electrocatalysts are emphasized with respect to their structures/morphologies,composition,electrical conductivity,specific surface area,chemical stability and corrosion resistance.The challenges of TMNs-based materials as bifunctional air-cathode electrocatalysts in practical application are evaluated,and numerous research guidelines to solve these problems are put forward for facilitating further research and development. 展开更多
关键词 Surface/interface nanoengineering Non-precious transition metal nitrides Zn-air batteries Oxygen reduction reaction Oxygen evolution reaction
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Phosphorous and selenium tuning Co-based non-precious catalysts for electrosynthesis of H2O2in acidic media 认领 引用 被引量：3
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作者 Jingxin Xie Lijie Zhong +6 位作者 Xin Yang Dequan He Kanglong Lin Xiaoxia Chen Huan Wang Shiyu Gan Li Niu 《Chinese Chemical Letters》 SCIE CAS CSCD 2024年第1期475-481,共7页
Electrosynthesis of hydrogen peroxide(H2O2)is an on-site method that enables independent distribution applications in many fields due to its small-scale and sustainable features.The crucial point remains developing hi... Electrosynthesis of hydrogen peroxide(H2O2)is an on-site method that enables independent distribution applications in many fields due to its small-scale and sustainable features.The crucial point remains developing highly active,selective and cost-effective electrocatalysts.The electrosynthesis of H2O2 in acidic media is more practical owing to its stability and no need for further purification.We herein report a phosphorus and selenium tuning Co-based non-precious catalyst(CoPSe)toward two-electron oxygen reduction reaction(2e–ORR)to produce H2O2 in acidic media.The starting point of using both P and Se is finding a balance between strong ORR activity of CoSe and weak activity of CoP.The results demonstrated that the CoPSe catalyst exhibited the optimized 2e–ORR activity compared with CoP and CoSe.It disclosed an onset potential of 0.68 V and the H2O2 selectivity 76%-85%in a wide potential range(0–0.5 V).Notably,the CoPSe catalyst overcomes a significant challenge of a narrow-range selectivity for transitionmetal based 2e–ORR catalysts.Finally,combining with electro-Fenton reaction,an on-site system was constructed for efficient degradation of organic pollutants.This work provides a promising non-precious Co-based electrocatalyst for the electrosynthesis of H2O2 in acidic media. 展开更多
关键词 Oxygen reduction reaction Electrochemical H2O2 production Electrocatalysis Non-precious electrocatalyst Acidic media
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Nanocarbon-based metal-free and non-precious metal bifunctional electrocatalysts for oxygen reduction and oxygen evolution reactions 认领 引用 被引量：6
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作者 Yansong Zhu Bingsen Zhang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第7期610-628,共19页
The oxygen reduction/evolution reactions(ORR/OER) are a key electrode process in the development of electrochemical energy conversion and storage devices,such as metal-air batteries and reversible fuel cells.The searc... The oxygen reduction/evolution reactions(ORR/OER) are a key electrode process in the development of electrochemical energy conversion and storage devices,such as metal-air batteries and reversible fuel cells.The search for low-cost high-performance nanocarbon-based metal-free and non-precious metal bifunctional electrocatalysts for ORR/OER alternatives to the widely-used noble metal-based catalysts is a research focus.This review aims to outline the opportunities and available options for these nanocarbon-based bifunctional electrocatalysts.Through discussion of some current scientific issues,we summarize the development and breakthroughs of these electrocatalysts.Then we provide our perspectives on these issues and suggestions for some areas in the further work.We hope that this review can improve the interest in nanocarbon-based metal-free and non-precious metal bifunctional electrocatalysts for ORR/OER. 展开更多
关键词 Nanocarbon-based Oxygen reduction/evolution Bifunctional electrocatalyst Metal-free Non-precious metal
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Recent advances in carbon-supported non-precious metal singleatom catalysts for energy conversion electrocatalysis 认领 引用 被引量：6
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作者 Li-Xia Liu Yangyang Ding +9 位作者 Linan Zhu Jin-Cheng Li Huitong Du Xiang Li Zhaoyuan Lyu Dan Du Fuqiang Liu Yuanyuan Wang Wenlei Zhu Yuehe Lin 《National Science Open》 2023年第2期115-160,共46页
Non-precious metal single-atom catalysts(NPM-SACs)with unique electronic structures and coordination environments have gained much attention in electrocatalysis owing to their low cost,high atomic utilization,and high... Non-precious metal single-atom catalysts(NPM-SACs)with unique electronic structures and coordination environments have gained much attention in electrocatalysis owing to their low cost,high atomic utilization,and high performance.NPM-SACs on carbon support(NPM-SACs/CS)are promising because of the carbon substrate with a large surface area,excellent electrical conductivity,and high chemical stability.This review provides an overview of recent developments in NPM-SACs/CS for the electrocatalytic field.First,the state-of-the-art synthesis methods and advanced characterization techniques of NPM-SACs/CS are discussed in detail.Then,the structural adjustment strategy of NPM-SACs/CS for optimizing electrocatalytic performance is introduced concisely.Furthermore,we provide a comprehensive summary of recent advances in developing NPM-SACs/CS for important electrochemical reactions,including carbon dioxide reduction reaction,hydrogen evolution reaction,oxygen evolution reaction,oxygen reduction reaction,and nitrogen reduction reaction.In the end,the existing challenges and future opportunities of NPM-SACs/CS in the electrocatalytic field are highlighted. 展开更多
关键词 single-atom catalysts non-precious metal electrocatalytic reaction carbon-supported
A versatile method for the encapsulation of various non-precious metal nanoparticles inside single-walled carbon nanotubes 认领 引用 被引量：2
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作者 Tingting Cui Xiulian Pan +3 位作者 Jinhu Dong Shu Miao Dengyun Miao Xinhe Bao 《Nano Research》 SCIE EI CSCD 2018年第6期3132-3144,共13页
We present a facile and versatile method for introducing various non-precious metal nanoparticles （NPs） in small nanotubes, such as single-walled carbon nanotubes （SWNTs）, including 3d-metals （V, Mn, Fe and Co）,... We present a facile and versatile method for introducing various non-precious metal nanoparticles （NPs） in small nanotubes, such as single-walled carbon nanotubes （SWNTs）, including 3d-metals （V, Mn, Fe and Co）, 4d-metals （Mo）, and 5d-metals （W）. This is realized by oxidizing encapsulated cycloalkene metal carbonyl complexes below their sublimation temperatures. This novel technique is significant because it avoids the diffusion and deposition of metal species on the outer walls of nanotubes, which has been challenging to achieve using the conventional filling methods. High-resolution transmission electron microscopy （HRTEM）, high angle annular dark field scanning transmission electron microscopy （HAADF-STEM）, energy-dispersive X-ray spectroscopy （EDX）, Raman, and X-ray photoelectron spectroscopy （XPS） analyses revealed high filling efficiencies （〉 95% SWNTs filled with metal NPs）. This method also provides a unique approach to fabricate highly dispersed and uniform SWNT-metal nanoparficle encapsulates with lower valence states, which are often not stable in the bulk. 展开更多
关键词 single-walled carbon nanotubes encapsulation non-precious metals confinement effect nanoparticles
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Advanced non-precious electrocatalyst of the mixed valence CoO_x nanocrystals supported on N-doped carbon nanocages for oxygen reduction 认领 引用 被引量：6
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作者 Sheng Chen Liwei Wang +8 位作者 Qiang Wu Xiang Li Yu Zhao Hongwei Lai Lijun Yang Tao Sun Yi Li Xizhang Wang Zheng Hu 《Science China Chemistry》 SCIE EI CAS CSCD 2015年第1期180-186,共7页
Taking advantage of the nitrogen(N)-participation and large surface area of N-doped carbon nanocages(NCNCs),the Co Ox nanocrystals are conveniently immobilized onto the NCNCs with high dispersion.The Co Ox/NCNCs hybri... Taking advantage of the nitrogen(N)-participation and large surface area of N-doped carbon nanocages(NCNCs),the Co Ox nanocrystals are conveniently immobilized onto the NCNCs with high dispersion.The Co Ox/NCNCs hybrid exists in the mixed valence with predominant Co O over Co3O4 and demonstrates superb oxygen reduction reaction activity and stability remaining^94%current density even after operation over 100 h.These results suggest a promising strategy to develop advanced electrocatalysts with the novel NCNCs or even beyond. 展开更多
关键词 cobalt oxide nanocrystals fuel cells non-precious electrocatalysts nitrogen doped carbon nanocages oxygen reductionreaction
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Synthesis and characterization of a novel binuclear iron phthalocyanine/reduced graphene oxide nanocomposite for non-precious electrocatalyst for oxygen reduction 认领 引用 被引量：4
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作者 Ruonan Li Dongtang Zhang +2 位作者 Yingyan Zhou Xiayan Wang Guangsheng Guo 《Science China Chemistry》 SCIE EI CAS CSCD 2016年第6期746-751,共6页
Binuclear iron phthalocyanineeduced graphene oxide(bi-Fe Pc/RGO) nanocomposite with good electrocatalytic activity for ORR in alkaline medium was prepared in one step. High angle annular dark field image scanning tran... Binuclear iron phthalocyanineeduced graphene oxide(bi-Fe Pc/RGO) nanocomposite with good electrocatalytic activity for ORR in alkaline medium was prepared in one step. High angle annular dark field image scanning transmission electron microscopy(HAADF-STEM) and energy dispersive X-ray spectroscopy element mapping results show bi-Fe Pc was uniformly distributed on RGO. An obvious cathodic peak located at about-0.23 V(vs. SCE) in CV and an onset potential of-0.004 V(vs. SCE) in LSV indicate the as-prepared bi-Fe Pc/RGO nanocomposite possesses high activity which is closed to Pt/C for ORR. The ORR on bi-Fe Pc/RGO nanocomposite follows four-electron transfer pathway in alkaline medium. Compared with Pt/C, there is only a slight decrease(about 0.02 V vs. SCE) for bi-Fe Pc/RGO nanocomposite when the methanol exists. The excellent activity and methanol tolerance in alkaline solutions proves that bi-Fe Pc/RGO nanocomposite could be considered as a promising cathode catalyst for alkaline fuel cells. 展开更多
关键词 binuclear iron phthalocyanine reduced graphene oxide in situ synthesis crossover effect non-precious metal catalysts
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Exploration of the oxygen transport behavior in non-precious metal catalyst-based cathode catalyst layer for proton exchange membrane fuel cells 认领 引用 被引量：3
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作者 Shiqu CHEN Silei XIANG +5 位作者 Zehao TAN Huiyuan LI Xiaohui YAN Jiewei YIN Shuiyun SHEN Junliang ZHANG 《Frontiers in Energy》 SCIE CSCD 2023年第1期123-133,共11页
High cost has undoubtedly become the biggest obstacle to the commercialization of proton exchange membrane fuel cells(PEMFCs),in which Pt-based catalysts employed in the cathodic catalyst layer(CCL)account for the maj... High cost has undoubtedly become the biggest obstacle to the commercialization of proton exchange membrane fuel cells(PEMFCs),in which Pt-based catalysts employed in the cathodic catalyst layer(CCL)account for the major portion of the cost.Although nonprecious metal catalysts(NPMCs)show appreciable activity and stability in the oxygen reduction reaction(ORR),the performance of fuel cells based on NPMCs remains unsatisfactory compared to those using Pt-based CCL.Therefore,most studies on NPMC-based fuel cells focus on developing highly active catalysts rather than facilitating oxygen transport.In this work,the oxygen transport behavior in CCLs based on highly active Fe-N-C catalysts is comprehensively explored through the elaborate design of two types of membrane electrode structures,one containing low-Pt-based CCL and NPMCbased dummy catalyst layer(DCL)and the other containing only the NPMC-based CCL.Using Zn-N-C based DCLs of different thickness,the bulk oxygen transport resistance at the unit thickness in NPMC-based CCL was quantified via the limiting current method combined with linear fitting analysis.Then,the local and bulk resistances in NPMC-based CCLs were quantified via the limiting current method and scanning electron microscopy,respectively.Results show that the ratios of local and bulk oxygen transport resistances in NPMCbased CCL are 80%and 20%,respectively,and that an enhancement of local oxygen transport is critical to greatly improve the performance of NPMC-based PEMFCs.Furthermore,the activity of active sites per unit in NPMCbased CCLs was determined to be lower than that in the Pt-based CCL,thus explaining worse cell performance of NPMC-based membrane electrode assemblys(MEAs).It is believed that the development of NPMC-based PEMFCs should proceed not only through the design of catalysts with higher activity but also through the improvement of oxygen transport in the CCL. 展开更多
关键词 proton exchange membrane fuel cells(PEMFCs) non-precious metal catalyst(NPMC) cathode catalyst layer(CCL) local and bulk oxygen transport resistance
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One-pot synthesis of Ni–Co nanoparticles@Ni0.19Co0.26P nanowires core/shell arrays on Ni foam for efficient hydrogen evolution reaction at all pH values 认领 引用 被引量：1
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作者 Lei Zhang Kaimin Chen +11 位作者 Luchang Li Xiu Wei Xianxin Cai Yaohui Yu Yixian Yang Renping Cao Fenghua Wei Bang Lan Yanhua Li Xiaohu Luo Hui Liang Deshuai Zhen 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第6期652-656,共5页
Developing non-precious electrocatalysts with high-efficiency hydrogen evolution reaction(HER)activity for hydrogen production at all pH values is crucial for the application and promotion of water electrolysis.Herein... Developing non-precious electrocatalysts with high-efficiency hydrogen evolution reaction(HER)activity for hydrogen production at all pH values is crucial for the application and promotion of water electrolysis.Herein,a unique structure of nickel-cobalt(Ni–Co)nanoparticles@Ni0.19Co0.26P nanowires core/shell arrays on Ni foam as a pH-universal electrocatalyst for hydrogen evolution is synthesized by a simple hydrothermal process and thermal reduction treatment.The morphological analysis reveals that numerous Ni–Co nanoparticles are densely packed inside the hollow interior of Ni0.19Co0.26P nanowires.This unique structure integrates the advantages of high surface area from the nanowires and enhanced electronic conductivity from the Ni–Co nanoparticles,effectively addressing the conventional issue of slow charge transfer rate in 3D metal-based compounds,which is typically caused by a long transfer distance.The electrocatalysts provide an excellent hydrogen evolution reaction performance in alkaline,neutral,and acidic media with an overpotential of 35,36,and 23 mV to reach the current density of 10 mA/cm2,respectively.This study highlights the potential of Ni–Co nanoparticles@Ni0.19Co0.26P nanowires as a cost-effective and pH-universal HER electrocatalyst,offering promising prospects for sustainable hydrogen production. 展开更多
关键词 HER pH-universal electrocatalyst Non-precious Core-shell structure High conductivity
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Ni-Cu diatomic sites for efficient semi-hydrogenation of acetylene 认领 引用
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作者 Zhengwen Li Jiajun Zhang +5 位作者 Wei Pan Shuairen Qian Yuhan Wang Dong Su Liguo Wang Binhang Yan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第2期975-983,I0020,共9页
Single-atom catalysts for alkyne semi-hydrogenation have been extensively investigated due to their high metal utilization and improved olefin selectivity.However,their reactivity is hindered by the sluggish activatio... Single-atom catalysts for alkyne semi-hydrogenation have been extensively investigated due to their high metal utilization and improved olefin selectivity.However,their reactivity is hindered by the sluggish activation of reactants on isolated sites.Herein,a non-precise metal catalyst consisting of Ni-Cu hetero-diatomic pairs was prepared using a sequential deposition method.The diatomic sites catalyst exhibited an unprecedented activity among non-precious catalysts with over 98%conversion and 77 molC2H2 molmetal-1 h-1 at 180℃,whereas the single-atom catalysts of Cu/C and Ni/C were almost inert under the same conditions.Experimental and theoretical results revealed the crucial diatomic synergy between the Ni-Cu pairs,wherein acetylene was adsorbed on Ni sites and hydrogen was adsorbed on Cu sites,and the diatomic site enabled spontaneous desorption of ethylene.The superior activity of the diatomic catalyst was observed,resulting from the enhanced dominance of d-electrons of Ni near the Fermi level.The research demonstrates an approach to designing non-precise metal catalysts with extraordinary catalytic performance for alkyne hydrogenation. 展开更多
关键词 Semi-hydrogenation Acetylene Non-precious metal Diatomic pairs Reactivity
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Ammonia-directed gas-metal-support interaction forming Ni3ZnN for efficient hydrogenation 认领 引用
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作者 Yinghui Pu Yiming Niu +2 位作者 Tongtong Gao Junnan Chen Bingsen Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第1期344-349,共6页
Metal-support interaction(MSI) is crucial for fine-tuning the active-site structure of supported catalysts and enhancing performance.Here,we present an ammonia-directed reactive gas-metal-support interaction(RGMSI),in... Metal-support interaction(MSI) is crucial for fine-tuning the active-site structure of supported catalysts and enhancing performance.Here,we present an ammonia-directed reactive gas-metal-support interaction(RGMSI),in which NH3 reduces ZnO and assembles an anti-perovskite Ni3ZnN structure with interstitial nitrogen,significantly boosting hydrogenation efficiency.Nitrogen incorporation expands the lattice parameter,increasing the(111) lattice spacing from 2.04Å in Ni to 2.18Å in Ni3ZnN,with an extended Ni-Ni interatomic distance from 2.49Å to 2.65Å.Additionally,Ni-N coordination shifts the d-band center downward and induces electron deficiency in Ni via charge transfer.These modifications optimize reactant adsorption on the tailored Ni3ZnN structure compared to Ni,leading to a remarkable increase in 1,3-butadiene hydrogenation selectivity from 30.0 % to 92.9 %,along with an enhanced TOF from 0.067 s-1 to 0.079 s-1.These findings highlight RGMSI as a versatile and effective strategy for designing supported metal catalysts,offering new insights into selective hydrogenation catalysis. 展开更多
关键词 Metal-support interaction Non-precious metal Interstitial atom Ni3ZnN Selective hydrogenation
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Cu-Co Oxide/Carbon Composites Modified by DBD Plasma for Flexible Zn-Air Battery Cathodes 认领 引用
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作者 Haixia Wu Sai Li +6 位作者 Na Liu Yuhang Wang Shuoshuo Wang Yameng Ma Zekai Ma Kui Zhang Dongyuan Yang 《Carbon and Hydrogen》 SCIE CAS CSCD 2026年第1期136-145,共10页
This study is aimed at the demand for high-performance energy storage systems in flexible wearable electronic devices,focusing on the development of cathode catalysts for flexible zinc-air batteries.Aiming at the prob... This study is aimed at the demand for high-performance energy storage systems in flexible wearable electronic devices,focusing on the development of cathode catalysts for flexible zinc-air batteries.Aiming at the problems of high cost and resource constraints of traditional noble metal catalysts,this study designed a nonnoble metal composite catalyst(Cu3-Co1/AC)based on copper-cobalt oxide/activated carbon and proposed an innovative“step-by-step synthesis-dielectric barrier discharge plasma synergistic modification”preparation strategy.By systematically regulating the plasma treatment power,time,and atmosphere,the influence of this modification technology on the microstructure,surface chemical state,and electrochemical performance of the catalyst was deeply explored.The results showed that the optimal modification condition was treated under oxygen atmosphere and 50 W for 10 min.This condition effectively introduces abundant oxygen vacancy defects into the catalyst,optimizes the valence distribution of Cu+/Cu2+and Co2+/Co3+,and strengthens the interface coupling between metal oxide and carbon support.The obtained Cu3-Co1/AC-DBD catalyst shows excellent bifunctional catalytic activity of ORR and OER,and the obtained bifunctional potential difference(ΔE)is about 0.866 V.The assembled flexible zinc-air battery exhibited a high power density of 240 mW cm-2 and achieved long-cycle stable operation of more than 90 h at a current density of 5 mA cm-2.This work not only confirms the effectiveness and uniqueness of low-temperature plasma technology in controllable preparation and performance enhancement of nonnoble metal catalysts,but also provides a new solution for the development of low-cost,high-activity,and long-life flexible zinc-air battery cathode materials’solution and solid experimental foundation. 展开更多
关键词 dielectric barrier discharge(DBD)plasma flexible zinc-air battery non-precious metal catalysts oxygen vacancies
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Tailoring OH∗adsorption strength on Ni/NbOx for boosting alkaline hydrogen oxidation reaction via oxygen vacancy 认领 引用
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作者 Guo Yang Kai Li +5 位作者 Hanshi Qu Jianbing Zhu Chunyu Ru Meiling Xiao Wei Xing Changpeng Liu 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第7期613-618,共6页
The development of efficient and robust non-precious metal electrocatalyst to drive the sluggish hydrogen oxidation reaction(HOR)is the key to the practical application of anion exchange membrane fuel cells(AEMFC),whi... The development of efficient and robust non-precious metal electrocatalyst to drive the sluggish hydrogen oxidation reaction(HOR)is the key to the practical application of anion exchange membrane fuel cells(AEMFC),which relies on the rational regulation of intermediates’binding strength.Herein,we reported a simple strategy to manipulate the adsorption energy of OH∗on electrocatalyst surface via engineering Ni/NbOx heterostructures with manageable oxygen vacancy(Ov).Theoretical calculations confirm that the electronic effect between Ni and NbOx could weaken the hydrogen adsorption on Ni,and the interfacial oxygen vacancy tailor hydroxide binding energy(OHBE).The optimized HBE and OHBE contribute to reduce formation energy of water during the alkaline HOR process.Furthermore,in situ Raman spectroscopy monitor the dynamic process that OH∗adsorbed on oxygen vacancy and react with adjacent H∗adsorbed Ni,confirming the vital role of OH∗for alkaline HOR process.As a result,the optimal Ni/NbOx exhibits a remarkable intrinsic activity with a specific activity of 0.036mA/cm2,which is 4-fold than that of pristine Ni counterpart and surpasses most non-precious electrocatalysts ever reported. 展开更多
关键词 Hydrogen oxidation reaction Anion exchange membrane fuel cells Non-precious metal catalyst Oxygen vacancy Heterostructure Hydroxyl binding energy
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Ultrafine Fe/Fe3C decorated on Fe-Nx-C as bifunctional oxygen electrocatalysts for efficient Zn-air batteries 认领 引用 被引量：7
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作者 Lingbo Zong Xin Chen +17 位作者 Siliang Liu Kaicai Fan Shuming Dou Jie Xu Xiaoxian Zhao Wenjun Zhang Yaowen Zhang Weicui Wu Fenghong Lu Lixiu Cui Xiaofei Jia Qi Zhang Yu Yang Jian Zhao Xia Li Yida Deng Yanan Chen Lei Wang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第5期72-79,共8页
Efficient bifunctional oxygen electrocatalysts for ORR and OER are fundamental to the development of high performance metal-air batteries.Herein,a facile cost-efficient two-step pyrolysis strategy for the fabrication ... Efficient bifunctional oxygen electrocatalysts for ORR and OER are fundamental to the development of high performance metal-air batteries.Herein,a facile cost-efficient two-step pyrolysis strategy for the fabrication of a bifunctional oxygen electrocatalyst has been proposed.The efficient non-preciousmetal-based electrocatalyst,Fe/Fe3C@Fe-Nx-C consists of highly curved onion-like carbon shells that encapsulate Fe/Fe3C nanoparticles,distributed on an extensively porous graphitic carbon aerogel.The obtained Fe/Fe3C@Fe-Nx-C aerogel exhibited superb electrochemical activity,excellent durability,and high methanol tolerance.The experimental results indicated that the assembly of onion-like carbon shells with encapsulated Fe/Fe3C yielded highly curved carbon surfaces with abundant Fe-Nxactive sites,a porous structure,and enhanced electrocatalytic activity towards ORR and OER,hence displaying promising potential for application as an air cathode in rechargeable Zn-air batteries.The constructed Zn-air battery possessed an exceptional peak power density of~147 mW cm-2,outstanding cycling stability(200 cycles,1 h per cycle),and a small voltage gap of 0.87 V.This study offers valuable insights regarding the construction of low-cost and highly active bifunctional oxygen electrocatalysts for efficient air batteries. 展开更多
关键词 Non-precious metal Nitrogen-rich carbon Fe/Fe3C Fe-Nx-C Bifunctional oxygen electrocatalysts
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Role of local coordination in bimetallic sites for oxygen reduction: A theoretical analysis 认领 引用 被引量：4
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作者 Yuqi Yang Hao Zhang +8 位作者 Zhaofeng Liang Yaru Yin Bingbao Mei Fei Song Fanfei Sun Songqi Gu Zheng Jiang Yuen Wu Zhiyuan Zhu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2020年第5期131-137,共7页
Understanding of the oxygen reduction reaction(ORR)mechanism for single atom catalysts is pivotal for the rational design of non-precious metal cathode materials and the commercialization of fuel cells.Herein,a series... Understanding of the oxygen reduction reaction(ORR)mechanism for single atom catalysts is pivotal for the rational design of non-precious metal cathode materials and the commercialization of fuel cells.Herein,a series of non-precious metal electrocatalysts based on nitrogen-doped bimetallic(Fe and Co)carbide were modeled by density functional theory calculations to predict the corresponding reaction pathways.The study elucidated prior oxygen adsorption on the Fe atom in the dual site and the modifier role of Co atoms to tune the electronic structures of Fe.The reaction activity was highly correlated with the bimetallic center and the coordination environment of the adjacent nitrogen.Interestingly,the preadsorption of*OH resulted in the apparent change of metal atoms'electronic states with the d-band center shifting toward the Fermi level,thereby boosting reaction activity.The result should help promote the fundamental understanding of active sites in ORR catalysts and provide an effective approach to the design of highly efficient ORR catalysts on an atomic scale. 展开更多
关键词 Non-precious metal catalysts Bimetallic-sites Oxygen reduction reaction Density functional theory
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Co_3O_4 nanoparticles assembled on polypyrrole/graphene oxide for electrochemical reduction of oxygen in alkaline media 认领 引用 被引量：3
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作者 任素贞 郭亚男 +6 位作者 马少博 毛庆 吴丹丹 杨莹 景洪宇 宋雪旦 郝策 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2017年第7期1281-1290,共10页
The development of highly efficient catalysts for cathodes remains an important objective of fuel cell research. Here, we report Co3O4 nanoparticles assembled on a polypyrrole/graphene oxide electrocatalyst （Co3O4/Pp... The development of highly efficient catalysts for cathodes remains an important objective of fuel cell research. Here, we report Co3O4 nanoparticles assembled on a polypyrrole/graphene oxide electrocatalyst （Co3O4/Ppy/GO） as an efficient catalyst for the oxygen reduction reaction （ORR） in alkaline media. The catalyst was prepared via the hydrothermal reaction of Co2＋ ions with Ppy-modified GO. The GO, Ppy/GO, and Co3O4/Ppy/GO were characterized using scanning electron microscopy, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy. The incorporation of Ppy into GO nanosheets resulted in the formation of a nitrogen-modified GO po-rous structure, which acted as an efficient electron-transport network for the ORR. With further anchoring of Co3O4 on Ppy/GO, the as-prepared Co3O4/Ppy/GO exhibited excellent ORR activity and followed a four-electron route mechanism for the ORR in alkaline solution. An onset potential of -0.10 V vs. a saturated calomel electrode and a diffusion limiting current density of 2.30 mA/cm^2 were achieved for the Co3O4/Ppy/GO catalyst heated at 800 ℃; these values are comparable to those for noble-metal-based Pt/C catalysts. Our work demonstrates that Co3O4/Ppy/GO is highly active for the ORR. Notably, the Ppy coupling effects between Co3O4 and GO provide a new route for the preparation of efficient non-precious electrocatalysts with hierarchical porous structures for fuel cell applications. 展开更多
关键词 Non-precious metal electrocatalyst Co3O4 Polypyrrole Graphene Oxygen reduction reaction Proton-exchange membrane fuel cell
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