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Phosphonated ionomer modulates electrochemical interfaces in high temperature polymer electrolyte membrane fuel cells 认领 引用
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作者 Yangyang Hu Zhangxun Xia +3 位作者 Congrong Yang Jicai Huang Suli Wang Gongquan Sun 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第4期850-857,共8页
Liquid phosphoric acid(PA),as the proton carrier for high temperature polymer electrolyte membrane fuel cells(HT-PEMFCs),presents challenges such as catalyst poisoning,high gas transport resistance and electrolyte los... Liquid phosphoric acid(PA),as the proton carrier for high temperature polymer electrolyte membrane fuel cells(HT-PEMFCs),presents challenges such as catalyst poisoning,high gas transport resistance and electrolyte loss.These issues significantly impede the performance and durability of HT-PEMFCs,thereby limiting their potential for further application.In this study,poly(2,3,5,6-tetrafluorostylene-4-phosphonic acid)(PWN)with intrinsic proton conduction ability was employed as catalyst layer binder to reveal the impacts of the ionomer's molecular structure on mass transport within the catalyst layer.Our findings demonstrated that increasing the phosphorylation degree of PWN could enhance both pore formation at the catalyst layer and electrode acidophilic capability while improving proton conduction ability and reducing cells'internal resistance.However,adverse effects included increased local oxygen transport resistance and decreased catalyst utilization resulting from electrode acidophilic capability.This research offers valuable insights for the relationships between micro-scale molecule structure,mesoscale electrode architecture,and membrane electrode assembly design in HT-PEMFCs. 展开更多
关键词 High temperature polymer electrolyte membrane fuel cells Phosphonated ionomers Oxygen transport resistance Electrochemical interface Porous electrode
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Synthesis of phosphonated graphene oxide by electrochemical exfoliation to enhance the performance and durability of high-temperature proton exchange membrane fuel cells 认领 引用 被引量：1
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作者 Jianuo Chen Zunmin Guo +3 位作者 Maria Perez-Page Yifeng Jia Ziyu Zhao Stuart M.Holmes 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第1期448-458,I0011,共11页
The doping of functionalized graphene oxide(GO)in the membranes becomes a promising method for improving the performance of high-temperature proton exchange membrane fuel cells(HT-PEMFC).Phosphonated graphene oxide(PG... The doping of functionalized graphene oxide(GO)in the membranes becomes a promising method for improving the performance of high-temperature proton exchange membrane fuel cells(HT-PEMFC).Phosphonated graphene oxide(PGO)with a P/O ratio of 8.5%was quickly synthesised by one-step electrochemical exfoliation based on a three-dimensiaonal(3D)printed reactor and natural graphite flakes.Compared with the GO prepared by the two-step electrochemical exfoliation method,the PGO synthesized by the one-step electrochemical exfoliation can better improve the performance of the membrane-electrode-assembly(MEA)based on the polybenzimidazole(PBI)membrane in the HTPEMFC.The doping of 1.5 wt%GO synthesised by electrochemical exfoliation with the 2-step method or reactor method in PBI increased the peak power density by 17.4%or 35.4%compared to MEA based on pure PBI membrane at 150℃,respectively.In addition,the doping of PGO in PBI improves its durability under accelerated stress test(AST). 展开更多
关键词 Electrochemical exfoliation Phosphonated graphene oxide High-temperature fuel cells
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Phosphonated USY,a promising catalyst for the development of environmentally benign biodiesel(methyl acetate) process 认领 引用 被引量：1
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作者 Kakasaheb Y.Nandiwale Gahana Gopal.C Vijay V.Bokade 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2015年第3期285-290,共6页
The present study focuses on the evaluation of the potential applicability of Ultra Stable Y（USY） and phosphonated USY（1 wt%-4 wt%phosphorous loading） as heterogeneous catalysts for biodiesel（methyl acetate） pro... The present study focuses on the evaluation of the potential applicability of Ultra Stable Y（USY） and phosphonated USY（1 wt%-4 wt%phosphorous loading） as heterogeneous catalysts for biodiesel（methyl acetate） production.The synthesized catalysts were characterized by powder X-ray diffraction（XRD）,Brunaer-Emmett-Teller（BET） surface area,total acidity by temperature-programmed desorption of ammonia（TPD-NH3） and Fourier Transform Infrared（FTIR） spectra.The performances of catalysts were evaluated for the transesterification of butyl acetate with methanol（a model reaction in biodiesel production）.In view to obtain a maximum yield of methyl acetate,the optimization of process parameters such as reactant molar ratio,catalyst loading,reaction temperature and reaction time was performed.All the phosphonated USY catalysts showed higher catalytic activity than the parent USY,which can be attributed to the increase of total acidity due to phosphonation.2 wt% P/USY（2% phosphorous loaded on USY） exhibited 92% methyl acetate yield with 100% selectivity,which was proved to be a potential catalyst for biodiesel production.The invented catalyst was found to be stable and reusable for five catalytic cycles,demonstrating that it might be a environmentally benign catalytic process. 展开更多
关键词 transesterification phosphonated USY methyl acetate biodiesel
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Novel phosphonated polymer without anhydride formation for proton exchange membrane fuel cells 认领 引用
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作者 Mrinmay Mandal 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第2期469-471,共3页
Proton exchange membrane fuel cells(PEMFCs)are regarded as one of the most promising clean energy technology because of their high energy density,silent emission-free operation,and wide applications[1].Recently,anion ... Proton exchange membrane fuel cells(PEMFCs)are regarded as one of the most promising clean energy technology because of their high energy density,silent emission-free operation,and wide applications[1].Recently,anion exchange membrane fuel cells(AEMFCs)has emerged as an alternative to PEMFCs. 展开更多
关键词 Phosphonated polymers Proton exchange membrane Membrane electrode assembly Fuel cell Durability
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Facile Synthesis and Adsorption Properties of Phosphonated Cellulose Beads for Selective Removal of Low-density Lipoprotein 认领 引用 被引量：1
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作者 Hao Feng YU Guo Qi FU Li LIU Bing Lin HE 《Chinese Chemical Letters》 SCIE CAS 2006年第9期1193-1196,共4页
A novel low-density lipoprotein adsorbent was prepared simply by directly phosphonating porous cellulose beads. Tests in vitro demonstrated that this adsorbent showed quite good adsorption performance for selective re... A novel low-density lipoprotein adsorbent was prepared simply by directly phosphonating porous cellulose beads. Tests in vitro demonstrated that this adsorbent showed quite good adsorption performance for selective removal of low-density lipoprotein from human plasma. The effects of preparation conditions on the lipoprotein sorption properties of the resulted adsorbent were investigated. The adsorption dynamics was also examined. 展开更多
关键词 Cellulose beads phosphonation low-density lipoprotein adsorption hyperlipemia
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Mitigating phosphonic acid-perovskite interfacial degradation via molecular engineering for ultra-stable solar cells 认领 引用
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作者 Xu Li Yuxiao Guo +2 位作者 Xin Luo Haoyuan Yan Bo Xu 《Journal of Semiconductors》 EI CAS CSCD 2026年第4期13-17,共5页
Metal halide perovskite solar cells(PSCs)are revolutionizing next-generation photovoltaics by combining high efficiency with low-cost solution processing and flexible compatibility.Certified efficiencies now surpass 2... Metal halide perovskite solar cells(PSCs)are revolutionizing next-generation photovoltaics by combining high efficiency with low-cost solution processing and flexible compatibility.Certified efficiencies now surpass 27%,nearing the theoretical limit for single-junction cells and highlighting their strong potential for commercialization[1].In contrast to traditional silicon cells,which require high-temperature processing and rigid substrates,PSCs can be fabricated near room temperature using earth-abundant materials,significantly lowering energy consumption and production costs.However,their commercialization is hindered by a fundamental challenge:insufficient long-term operational stability. 展开更多
关键词 interfacial degradation silicon cellswhich ultra stable solar cells phosphonic acid metal halide perovskite solar cells pscs metal halide perovskite solar cells PSCs molecular engineering
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Recent developments in the synthesis of pharmacological alkyl phosphonates 认领 引用 被引量：1
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作者 Chenglong Xuan Zhimin Zhu +1 位作者 Ziyang Li Chao Shu 《Advanced Agrochem》 CAS CSCD 2025年第1期13-29,共17页
Organophosphate analogues are commonly occurring structural features that are widely present in numerous natural substances, biologically active molecules and modern pharmaceutical compounds. The development of effici... Organophosphate analogues are commonly occurring structural features that are widely present in numerous natural substances, biologically active molecules and modern pharmaceutical compounds. The development of efficient strategies for the preparation of these analogues is still attractive but challenging in organophosphorus chemistry. In order to fill this gap, different new routes have been discovered including direct phosphonylation of alkyl radicals, indirect Arbuzov phosphonylation of alkyl radicals and nucleopilic phosphonylation of phosphorus. In this short review, we have attempted to summarize these recent developments for the synthesis of alkyl phosphonates in order to facilitate the development of green pharmacological alkyl phosphonates by emphasizing their variety of products, specificity and relevance, and providing the underlying mechanistic rationale whenever it is possible. We aim to provide readers with a comprehensive understanding of the current state of this field and contribute to future research. 展开更多
关键词 Alkyl phosphonates Herbicides Radicals Phosphites Synthesis
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Photoresponsive lanthanide-dianthracene framework:Introduction of photoactive anthracene pairs by controlling the synthesis temperature 认领 引用
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作者 Ran Gao Qian Zou +5 位作者 Qian-Qian Su Xiu-Fang Ma Ye-Hui Qin Rui Liao Song-Song Bao Li-Min Zheng 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第10期632-636,共5页
Metal-organic frameworks(MOFs)containing face-to-faceπ-πinteracting anthracene groups are promising photoresponsive materials because of their rich photophysical properties and their ability to undergo reversible[4+... Metal-organic frameworks(MOFs)containing face-to-faceπ-πinteracting anthracene groups are promising photoresponsive materials because of their rich photophysical properties and their ability to undergo reversible[4+4]photocycloaddition reaction,but it is extremely challenging to obtain such materials.Herein,we propose a generalized method to accomplish photoresponsive MOFs by introducing anthracene pairs into the framework of the dianthracene-phosphonate-based MOFs by controlling the synthesis temperature.Compounds Dy2(ampH)2x(amp2H2)3-x(H2O)6·4H2O[x=0.01,Dy-70;x=0.02,Dy-80;x=0.037,Dy-90;amp2H4=pre-photodimerized 9-anthracenemethylphosphonic acid(amp H2)]were obtained by the reaction of DyCl3and amp2H4in water at 70,80,and 90℃,respectively.They all show excimer emission of paired anthracenes at ca.555 nm.Detailed studies of Dy-90 have shown that it undergoes a reversible photodimerization reaction under 365 nm and then 280 nm illumination,accompanied by luminescence changes.This property further enables Dy-90 to be used for optical anti-counterfeiting. 展开更多
关键词 Metal-organic framework Photoresponsive Anthracene excimer Phosphonate Anti-counterfeiting
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Application of EDTMPS as a novel calcite depressant in scheelite flotation 认领 引用 被引量：17
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作者 Fen Jiao Wei Li +4 位作者 Xu Wang Congren Yang Zhengquan Zhang Liwen Fu Wenqing Qin 《International Journal of Mining Science and Technology》 SCIE EI CAS CSCD 2023年第5期639-647,共9页
In this study, the innovative use of ethylenediamine tetramethylene phosphonic sodium(EDTMPS) as a calcite depressant in scheelite flotation was investigated by flotation experiments, and its selective depression mech... In this study, the innovative use of ethylenediamine tetramethylene phosphonic sodium(EDTMPS) as a calcite depressant in scheelite flotation was investigated by flotation experiments, and its selective depression mechanism was revealed by contact angle measurement, FTIR analysis, Zeta potential test and XPS analysis. The flotation experiment results showed that scheelite and calcite could be efficiently separated under the following conditions: pulp p H=9.5, Na OL concentration of 1.5×10-4mol/L, EDTMPS concentration of 3.0×10-5mol/L, a scheelite concentrate with WO3grade of 65.49%, recovery of 83.29%and separation efficiency of 65.29% could be obtained from the artificially mixed minerals. The analysis results of mineral surface properties demonstrated that EDTMPS was strongly adsorbed onto the calcite surface through the reaction between the phosphonate group and the calcium ions, which hindered Na OL adsorption and increased the hydrophilicity of calcite. However, EDTMPS had weak adsorption strength on the scheelite surface, which didn’t affect further adsorption of Na OL, hence, the scheelite remained hydrophobic. Consequently, the selective adsorption of EDTMPS on the two minerals’ surfaces increased a difference in wettability and thus enabling them to be separated by flotation. Finally, the mechanism model of this flotation separation process was established. 展开更多
关键词 Ethylenediamine tetramethylene phosphonic sodium Scheelite Calcite Flotation Selective depression
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Flotation behavior and adsorption mechanism of(1-hydroxy-2-methyl-2-octenyl) phosphonic acid to cassiterite 认领 引用 被引量：35
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作者 谭鑫 何发钰 +1 位作者 尚衍波 印万忠 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第9期2469-2478,共10页
The flotation behavior and adsorption mechanism of novel（1-hydroxy-2-methyl-2-octenyl） phosphonic acid（HEPA） to cassiterite were investigated by micro-flotation tests, zeta potential measurements, FTIR determinati... The flotation behavior and adsorption mechanism of novel（1-hydroxy-2-methyl-2-octenyl） phosphonic acid（HEPA） to cassiterite were investigated by micro-flotation tests, zeta potential measurements, FTIR determination and density functional theory（DFT） calculation. The flotation results demonstrated that HEPA exhibited superior collecting performance compared with styrene phosphonic acid（SPA）. The cassiterite recovery maintained above 90% over a wide pH range of 2-9 with 50 mg/L HEPA. The results of zeta potential measurement and FTIR detection indicated that the adsorption of HEPA onto cassiterite was mainly attributed to the chemisorption between HEPA monoanions and Sn species on mineral surfaces. The DFT calculation results demonstrated that HEPA monoanions owned higher HOMO energy and exhibited a better affinity to cassiterite than SPA, which provided very clear evidence for the stronger collecting power of HEPA presented in floatation test and zeta potential measurement. 展开更多
关键词 （1-hydroxy-2-methyl-2-octenyl） phosphonic acid cassiterite adsorption flotation density functional theory
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Hydrophobic flocculation flotation of rutile fines in presence of styryl phosphonic acid 认领 引用 被引量：16
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作者 Xiao-tao HUANG Wei XIAO +6 位作者 Hong-bo ZHAO Pan CAO Qi-xiu HU Wen-qing QIN Yan-sheng ZHANG Guan-zhou QIU Jun WANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2018年第7期1425-1433,共9页
The hydrophobic flocculation flotation of rutile fines in the presence of styryl phosphonic acid（SPA） was investigated by flotation tests, zeta-potential measurement, optical microscope observation, laser-based part... The hydrophobic flocculation flotation of rutile fines in the presence of styryl phosphonic acid（SPA） was investigated by flotation tests, zeta-potential measurement, optical microscope observation, laser-based particle size analysis, adsorption measurements and DLVO theory. The flotation tests indicated that rutile fines could be flocculated by SPA, and pH, shear force（stirring speed） and stirring time played significant roles in flocculation. The isoelectric point（IEP） and zeta-potential in whole range all moved to negative values as SPA was added according to the results from zeta-potential measurement. It was demonstrated that the primary reason for above was chemical adsorption. The laser-based particle size results showed the particle size at a stirring speed of 1800 r/min and 1000 mg/L SPA was the largest in all experiments. Furthermore, using the optical microscope observation and flotation tests, it was important for flotation of rutile fines to produce the flocculant. In the light of above-mentioned facts, floc flotation of rutile fines could be induced in the form of chemical adsorption by SPA to increase particle size. The data calculated from DLVO theory also indicated that chemical adsorption was the main reason for the formation of flocculant. 展开更多
关键词 hydrophobic flocculation flotation rutile fines styryl phosphonic acid（SPA） DLVO theory
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Phosphonate-derived nitrogen-doped cobalt phosphate/carbon nanotube hybrids as highly active oxygen reduction reaction electrocatalysts 认领 引用 被引量：6
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作者 Hui Zhao Chen-Chen Weng +3 位作者 Jin-Tao Ren Li Ge Yu-Ping Liu Zhong-Yong Yuan 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2020年第2期259-267,共9页
The exploration of cost-effective non-noble-metal electrocatalysts is highly imperative to replace the state-of-the-art platinum-based catalysts for oxygen reduction reaction(ORR). Here, we prepared cobalt phosphonate... The exploration of cost-effective non-noble-metal electrocatalysts is highly imperative to replace the state-of-the-art platinum-based catalysts for oxygen reduction reaction(ORR). Here, we prepared cobalt phosphonate-derived N-doped cobalt phosphate/carbon nanotube hybrids(Co Pi C-N/CNTs) by hydrothermal treatment of N-containing cobalt phosphonate and oxidized carbon nanotubes(o-CNT) followed by high-temperature calcination under nitrogen atmosphere. The resultant Co Pi C-N/CNT exhibits a superior electrocatalytic performance for the ORR in alkaline media, which is equal to the commercial Pt/C catalyst in the aspect of half-wave potential, onset potential and diffuse limiting current density. Furthermore, the excellent tolerance to methanol and strong durability outperform those of commercial Pt/C. It is found that cobalt phosphonate-derived N-doped cobalt phosphate and the in-situ formed graphitic carbons play key roles on the activity enhancement. Besides, introducing a suitable amount of CNTs enhances the electronic conductivity and further contributes to the improved ORR performance. 展开更多
关键词 Metal phosphonate Metal phosphate Carbon nanotubes Oxygen reduction reaction Electrocatalysis
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Adsorption mechanism of styryl phosphonate ester as collector in ilmenite flotation 认领 引用 被引量：7
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作者 Yan-ling XU Kai-hua HUANG +3 位作者 Hong-qiang LI Wei HUANG Cheng LIU Si-yuan YANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第12期4088-4098,共11页
A styryl phosphonate ester(SPE) collector was used to improve the flotation performance of ilmenite, and the adsorption mechanism and model were revealed and established, respectively. Microflotation tests showed that... A styryl phosphonate ester(SPE) collector was used to improve the flotation performance of ilmenite, and the adsorption mechanism and model were revealed and established, respectively. Microflotation tests showed that SPE exhibited a stronger collecting ability for ilmenite than the traditional collector styrene phosphonic acid(SPA). Zeta potential measurements revealed that both SPE and SPA could negatively shift the zeta potential of ilmenite, while SPE had more effects than SPA, suggesting the stronger adsorption of SPE. The analysis of X-ray photoelectron spectroscopy confirmed the chemisorption of SPA and SPE onto the Fe/Ti sites of ilmenite. According to frontier orbital theory, the chemical activities of SPE are greater than those of SPA. The partial densities of states analysis indicated that the PO—H groups of the collectors could interact with the Ti/Fe atoms of the ilmenite surface to generate a stable four-membered ring. The bonding model of the collector and(104) ilmenite surface showed that the adsorption energy of SPE was higher than that of SPA. Overall, SPE presented a better collecting ability and interaction effect for ilmenite flotation than SPA, and had the potential to replace SPA in the industry. 展开更多
关键词 styryl phosphonate ester ilmenite flotation collector X-ray photoelectron spectroscopy density functional theory adsorption mechanism
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Intermolecular Acid-Base-Pairs Containing Poly(p-Terphenyl-co-lsatin Piperidinium)for High Temperature Proton Exchange Membrane Fuel Cells 认领 引用 被引量：4
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作者 Xiaofeng Hao Zhen Li +6 位作者 Min Xiao Zhiheng Huang Dongmei Han Sheng Huang Wei Liu Shuanjin Wang Yuezhong Meng 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2024年第3期406-414,共9页
How to optimize and regulate the distribution of phosphoric acid in matrix,and pursuing the improved electrochemical performance and service lifetime of high temperature proton exchange membrane(HT-PEMs)fuel cell are ... How to optimize and regulate the distribution of phosphoric acid in matrix,and pursuing the improved electrochemical performance and service lifetime of high temperature proton exchange membrane(HT-PEMs)fuel cell are significant challenges.Herein,bifunctional poly(p-terphenyl-co-isatin piperidinium)copolymer with tethered phosphonic acid(t-PA)and intrinsic tertiary amine base groups are firstly prepared and investigated as HT-PEMs.The distinctive architecture of the copolymer provides a well-designed platform for rapid proton transport.Protons not only transports through the hydrogen bond network formed by the adsorbed free phosphoric acid(f-PA)anchored by the tertiary amine base groups,but also rely upon the proton channel constructed by the ionic cluster formed by the t-PA aggregation.Thorough the design of the structure,the bifunctional copolymers with lower PA uptake level(<100%)display prominent proton conductivities and peak power densities(99 mS cm-1,812 mW cm-2at 160℃),along with lower PA leaching and higher voltage stability,which is a top leading result in disclosed literature.The results demonstrate that the design of intermolecular acid-base-pairs can improve the proton conductivity without sacrificing the intrinsic chemical stability or mechanical property of the thin membrane,realizing win-win demands between the mechanical robustness and electrochemical properties of HT-PEMs. 展开更多
关键词 bifunctional copolymer high temperature proton exchange membrane intermolecular acid-base-pairs phosphonic acid retention phosphonic acid uptake level
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CORROSION BEHAVIOR OF A ZIRCONIUM-TITANIUM BASED PHOSPHONIC ACID CONVERSION COATING ON AA6061 ALUMINIUM ALLOY 认领 引用 被引量：15
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作者 S.H. Wang C.S. Liu F.J. Shan 《Acta Metallurgica Sinica(English Letters)》 EI CAS 2008年第4期269-274,共6页
The conversion coating was formed by dipping AA6061 in a fluorotitanate/zirconate acid and amino trimethylene phosphonic acid （ATMP） solution at room temperature. The formation process and the anti-corrosion perform... The conversion coating was formed by dipping AA6061 in a fluorotitanate/zirconate acid and amino trimethylene phosphonic acid （ATMP） solution at room temperature. The formation process and the anti-corrosion performance of the conversion coating were investigated using electrochemical test and salt spray test （SST）, respectively. The electrochemical test shows that the Zr/Ti and ATMP coating improves the corrosion resistance of AA6061 as good as the chromate （VI） coating. But the results of SST show that the corrosion resistance of Zr/Ti and ATMP coating is not as good as the chromate （VI） coating. The corrosion area is less than 2% after 72 h. 展开更多
关键词 Corrosion resistance Fluorotitanate/zireonate acid Phosphonic acid Aluminium alloy Conversion coating
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Activating Ru in the pyramidal sites of Ru2P-type structures with earth-abundant transition metals for achieving extremely high HER activity while minimizing noble metal content 认领 引用 被引量：5
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作者 Sayed M.El-Refaei Patrícia A.Russo +4 位作者 Thorsten Schultz Zhe-Ning Chen Patrick Amsalem Norbert Koch Nicola Pinna 《Carbon Energy》 SCIE EI CAS CSCD 2024年第9期80-92,共13页
Rational design of efficient pH-universal hydrogen evolution reaction catalysts to enable large-scale hydrogen production via electrochemical water splitting is of great significance,yet a challenging task.Herein,Ru a... Rational design of efficient pH-universal hydrogen evolution reaction catalysts to enable large-scale hydrogen production via electrochemical water splitting is of great significance,yet a challenging task.Herein,Ru atoms in the Ru2P structure were replaced with M=Co,Ni,or Mo to produce M2-xRuxP nanocrystals.The metals show strong site preference,with Co and Ni occupying the tetrahedral sites and Ru the square pyramidal sites of the CoRuP and NiRuP Ru2P-type structures.The presence of Co or Ni in the tetrahedral sites leads to charge redistribution for Ru and,according to density functional theory calculations,a significant increase in the Ru d-band centers.As a result,the intrinsic activity of CoRuP and NiRuP increases considerably compared to Ru2P in both acidic and alkaline media.The effect is not observed for MoRuP,in which Mo prefers to occupy the pyramidal sites.In particular,CoRuP shows state-of-the-art activity,outperforming Ru2P with Pt-like activity in 0.5 M H2SO4(η10=12.3 mV;η100=52 mV;turnover frequency(TOF)=4.7 s-1).It remains extraordinarily active in alkaline conditions(η10=12.9 mV;η100=43.5 mV)with a TOF of 4.5 s-1,which is 4x higher than that of Ru2P and 10x that of Pt/C.Further increase in the Co content does not lead to drastic loss of activity,especially in alkaline medium,where,for example,the TOF of Co1.9Ru0.1P remains comparable to that of Ru2P and higher than that of Pt/C,highlighting the viability of the adopted approach to prepare cost-efficient catalysts. 展开更多
关键词 electrocatalysis ruthenium phosphide transition metal phosphonates
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A Manganese(Ⅱ) Coordination Polymer Constructed from Phosphonate Ligand:Synthesis,Crystal Structure and Magnetic Properties 认领 引用 被引量：5
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作者 XU Yan LIU Bin +1 位作者 LI Jie GAO Li 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2021年第3期306-310,272,共5页
A coordination polymer formulated as[Mn(5-pncH2)2H2O](1,5-pncH3=5-phosphono-1-naphthalenecarboxylic acid),was hydrothermally synthesized and magnetically characterized.Compound 1 features a three-dimension... A coordination polymer formulated as[Mn(5-pncH2)2H2O](1,5-pncH3=5-phosphono-1-naphthalenecarboxylic acid),was hydrothermally synthesized and magnetically characterized.Compound 1 features a three-dimensional structure in which the inorganic chains of[Mn(O-P-O)]n are cross-linked by the organic groups of phosphonate ligands.Magnetic measurements of 1 indicate that dominant antiferromagnetic interactions are mediated between the MnⅡ centers. 展开更多
关键词 manganese phosphonate ligand crystal structure magnetic properties
Separation and recovery of rare earth from waste nickel-metal hydride batteries by phosphate based extraction-precipitation 认领 引用 被引量：3
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作者 Hailan Zhi Shuainan Ni +3 位作者 Xiang Su Wenqi Xie Hepeng Zhang Xiaoqi Sun 《Journal of Rare Earths》 SCIE EI CAS CSCD 2022年第6期974-980,I0005,共7页
A novel type of extraction-precipitation strategy based on phosphate was developed to recover rare earth(RE,i.e.,La,Ce,Nd,and Pr)from waste nickel-metal hydride(NiMH)batteries.This method does not require saponificati... A novel type of extraction-precipitation strategy based on phosphate was developed to recover rare earth(RE,i.e.,La,Ce,Nd,and Pr)from waste nickel-metal hydride(NiMH)batteries.This method does not require saponification and organic solvents.The novel phosphates,i.e.,dibenzyl phosphate(DBP),diphenyl phosphate(DPP),triphenyl phosphate(TPP)were studied as extraction-precipitants.DBP has high precipitation efficiencies for RE3+,which can reach 97.84%,100%,100%and 99.77%,respectively.In addition,the precipitation efficiencies of Mn2+,Co2+and Ni2+are less than 1.75%.DBP-RE has the largest particle size(D10=52.6μm,D50=135.35μm,D90=296.08μm),which is much larger than the precipitations formed by NH4HCO3,H2C2O4,CaO and MgO.The larger precipitation particle sizes contribute to improving the solid-liquid separation efficiency.With 3 mol/L hydrochloric acid,the stripping efficiency of DBP-RE reaches 98.60%,and the purity of recovered RE is 99.85%.The regenerated DBP can be directly used for the recycling extraction.Therefore,the novel extraction-precipitation strategy is a green and sustainable separation method. 展开更多
关键词 Waste nickel-metal hydride battery Rare earth Extraction-precipitation Phosphonic acid(ester)
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Synthesis of N-methylene phosphonic chitosan(NMPCS)and its potential as gene carder 认领 引用 被引量：3
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作者 Dun Wan Zhu Jin Gen Bo +10 位作者 Hai Ling Zhang Wen Guang Liu Xi Gang Leng Cun Xian Song Yu Ji Yin Li Ping Song Lan Xia Liu Lin Mei Xiu Lan Li Yang Zhang Kang De Yao 《Chinese Chemical Letters》 SCIE CAS 2007年第11期1407-1410,共4页
N-Methylene phosphonic chitosan （NMPCS）, an amphiphilic macromolecule with powerful chelating ability of Ca^2＋ ions, was synthesized and characterized. The physicochernical properties of NMPCS and the interactions ... N-Methylene phosphonic chitosan （NMPCS）, an amphiphilic macromolecule with powerful chelating ability of Ca^2＋ ions, was synthesized and characterized. The physicochernical properties of NMPCS and the interactions between NMPCS and plasmid DNA were investigated by FTIR, ^13C NMR, X-ray, agarose gel electrophoresis retardation assay, atomic force microscopy （AFM） and circular dichroism （CD）. The results suggest that at charge ratio 2：1 or above, DNA could be completely entrapped and spherical complexes with mean size of 80-210 nm were formed. Taking HeLa as host cell, luciferase expression mediated by NMPCS improved about 100 times compared to the expression mediated by chitosan. 展开更多
关键词 Non-viral vector Gene delivery N-Methylene phosphonic chitosan
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Hydroxychloroquine and a low antiresorptive activity bisphosphonate conjugate prevent and reverse ovariectomy-induced bone loss in mice through dual antiresorptive and anabolic effects 认领 引用 被引量：2
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作者 Zhenqiang Yao Akram Ayoub +8 位作者 Venkatesan Srinivasan Jun Wu Churou Tang Rong Duan Aleksa Milosavljevic Lianping Xing Frank H.Ebetino Alison J.Frontier Brendan F.Boyce 《Bone Research》 SCIE CAS CSCD 2024年第3期734-744,共11页
Osteoporosis remains incurable.The most widely used antiresorptive agents,bisphosphonates(BPs),also inhibit bone formation,while the anabolic agent,teriparatide,does not inhibit bone resorption,and thus they have limi... Osteoporosis remains incurable.The most widely used antiresorptive agents,bisphosphonates(BPs),also inhibit bone formation,while the anabolic agent,teriparatide,does not inhibit bone resorption,and thus they have limited efficacy in preventing osteoporotic fractures and cause some side effects. 展开更多
关键词 res conjugate phosphonate
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