期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到16,506篇文章
< 1 2 … 250 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Spatial confinement:An effective strategy to improve H2O and SO2 resistance of the expandable graphite-modified TiO2-supported Pt nanocatalysts for CO oxidation 认领 引用 被引量：2
1
作者 Hongtai Zhu Wenge Qiu +2 位作者 RuiWu Kai Li Hong He 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2025年第2期57-68,共12页
The expandable graphite(EG)modified TiO2 nanocomposites were prepared by the high shearmethod using the TiO2 nanoparticles(NPs)and EG as precursors,in which the amount of EG doped in TiO2 was 10 wt.%.Followed... The expandable graphite(EG)modified TiO2 nanocomposites were prepared by the high shearmethod using the TiO2 nanoparticles(NPs)and EG as precursors,in which the amount of EG doped in TiO2 was 10 wt.%.Followed by the impregnation method,adjusting the pH of the solution to 10,and using the electrostatic adsorption to achieve spatial confinement,the Pt elementswere mainly distributed on the exposed TiO2,thus generating the Pt/10EG-TiO2-10 catalyst.The best CO oxidation activity with the excellent resistance to H2O and SO2 was obtained over the Pt/10EG-TiO2-10 catalyst:CO conversion after 36 hr of the reaction was ca.85%under the harsh condition of 10 vol.%H2O and 100 ppm SO2 at a high gaseous hourly space velocity(GHSV)of 400,000 hr−1.Physicochemical properties of the catalystswere characterized by various techniques.The results showed that the electrostatic adsorption,which riveted the Pt elements mainly on the exposed TiO2 of the support surface,reduced the dispersion of Pt NPs on EG and achieved the effective dispersion of Pt NPs,hence significantly improving CO oxidation activity over the Pt/10EG-TiO2-10 catalyst.The 10 wt.%EG doped in TiO2 caused the TiO2 support to form a more hydrophobic surface,which reduced the adsorption of H2O and SO2 on the catalyst,greatly inhibited deposition of the TiOSO4 and formation of the PtSO4 species as well as suppressed the oxidation of SO2,thus resulting in an improvement in the resistance to H2O and SO2 of the Pt/10EG-TiO2-10 catalyst. 展开更多
关键词 Expandable graphite Electrostatic adsorption Titania supported platinum CO oxidation Resistance to H2O and SO2
暂未订购 下载PDF
Scavenging HF and engineering cathode interphase using Diphenylvinylethoxysilane(DPVS)to enhance temperature performance of pouch LiNi0.8Co0.1Mn0.1O2/graphite batteries 认领 引用 被引量：1
2
作者 Ruoke Li Xiang Gao +6 位作者 Jiaxin Zhang Peiqi Zhou Yongqi Li Weizhen Fan Xianlu Hou Xiaoyang Zhao Junmin Nan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第7期48-59,I0003,共12页
Nickel-rich cathodes demonstrate superior energy density in lithium-ion batteries(LIBs),yet their thermal and structural instability remains a critical challenge.Particularly at high temperatures,intensified electroly... Nickel-rich cathodes demonstrate superior energy density in lithium-ion batteries(LIBs),yet their thermal and structural instability remains a critical challenge.Particularly at high temperatures,intensified electrolyte side reactions generate increasing amounts of HF,which corrodes the electrode interphases and degrades battery performance.This work introduces Diphenylvinylethoxysilane(DPVS)additive,containing unsaturated bonds and Si-O bond,as a bifunctional additive to design high-performance electrolytes,thereby enhancing the cycling performance of LiNi0.8Co0.1Mn0.1O2(NCM811)/graphite LIBs at elevated temperatures.At 25℃,after 1200 cycles,the capacity retention of batteries using DPVScontaining electrolyte reached 92%,whereas that of batteries using blank electrolyte was only 77%.At 45℃,DPVS significantly improves the cycling stability,with the cycle numbers to reach 80%capacity retention increasing from 310 to 550.The improvement is attributed to its dual functions;the unsaturated bonds are preferentially oxidized to form a thin and dense interphase through polymerization reactions,while the Si-O bond effectively scavenges HF.Together,they suppress electrolyte decomposition,HF attack on interphases,and structural degradation of NCM811 materials.This work not only develops a functional electrolyte that enhances the long-term cycling performance of NCM811/graphite LIBs but also provides new insights into the design of functional electrolytes. 展开更多
关键词 LiNi0.8Co0.1Mn0.1O2/graphite battery High temperature performance Diphenylvinylethoxysilane Electrolyte additive
暂未订购 下载PDF
Hot‐electron‐assisted S‐scheme heterojunction of tungsten oxide/graphitic carbon nitride for broad‐spectrum photocatalytic H2generation 认领 引用 被引量：15
3
作者 Qinqin Liu Xudong He +3 位作者 Jinjun Peng Xiaohui Yu Hua Tang Jun Zhang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第9期1478-1487,共10页
Extended light absorption and dynamic charge separation are vital factors that determine the effectivenessof photocatalysts.In this study,a nonmetallic plasmonic S‐scheme photocatalyst was fabricatedby loading 1D pla... Extended light absorption and dynamic charge separation are vital factors that determine the effectivenessof photocatalysts.In this study,a nonmetallic plasmonic S‐scheme photocatalyst was fabricatedby loading 1D plasmonic W18O49nanowires onto 2D g‐C3N4nanosheets.W18O49nanowiresplay the dual role of a light absorption antenna—that extends light adsorption—and a hot electrondonor—that assists the water reduction reaction in a wider light spectrum range.Moreover,S‐scheme charge transfer resulting from the matching bandgaps of W18O49and g‐C3N4can lead tostrong redox capability and high migration speed of the photoinduced charges.Consequently,in thisstudy,W18O49/g‐C3N4hybrids exhibited higher photocatalytic H2 generation than that of pristineg‐C3N4under light irradiation of 420–550 nm.Furthermore,the H2 production rate of thebest‐performing W18O49/g‐C3N4hybrid was 41.5μmol·g−1·h−1upon exposure to monochromaticlight at 550 nm,whereas pure g‐C3N4showed negligible activity.This study promotes novel andenvironmentally friendly hot‐electron‐assisted S‐scheme photocatalysts for the broad‐spectrumutilization of solar light. 展开更多
关键词 Graphite carbon nitride W18O49 S‐scheme Photocatalytic H2 generation Wide spectrum
暂未订购 下载PDF
Construction of efficient active sites through cyano‐modified graphitic carbon nitride for photocatalytic CO2 reduction 认领 引用 被引量：8
4
作者 Fang Li Xiaoyang Yue +2 位作者 Haiping Zhou Jiajie Fan Quanjun Xiang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第9期1608-1616,共9页
The active site amount of photocatalysts,being the key factors in photocatalytic reactions,directly affects the photocatalytic performance of the photocatalyst.Pristine graphitic carbon nitride(g‐C3N4)exhibits ... The active site amount of photocatalysts,being the key factors in photocatalytic reactions,directly affects the photocatalytic performance of the photocatalyst.Pristine graphitic carbon nitride(g‐C3N4)exhibits moderate photocatalytic activity due to insufficient active sites.In this study,cyano‐modified porous g‐C3N4nanosheets(MCN‐0.5)were synthesized through molecular self‐assembly and alkali‐assisted strategies.The cyano group acted as the active site of the photocatalytic reaction,because the good electron‐withdrawing property of the cyano group promoted carrier separation.Benefiting from the effect of the active sites,MCN‐0.5 exhibited significantly enhanced photocatalytic activity for CO2 reduction under visible light irradiation.Notably,the photocatalytic activity of MCN‐0.5 was significantly reduced when the cyano groups were removed by hydrochloric acid(HCl)treatment,further verifying the role of cyano groups as active sites.The photoreduction of Pt nanoparticles provided an intuitive indication that the introduction of cyano groups provided more active sites for the photocatalytic reaction.Furthermore,the controlled experiments showed that g‐C3N4grafted with cyano groups using melamine as the precursor exhibited enhanced photocatalytic activity,which proved the versatility of the strategy for enhancing the activity of g‐C3N4via cyano group modification.In situ diffuse reflectance infrared Fourier transform spectroscopy and theoretical calculations were used to investigate the mechanism of enhanced photocatalytic activity for CO2 reduction by cyano‐modified g‐C3N4.This work provides a promising route for promoting efficient solar energy conversion by designing active sites in photocatalysts. 展开更多
关键词 Graphitic carbon nitride Cyano group modification Active sites Electron acceptor Porous structure Photocatalytic CO2 reduction
暂未订购 下载PDF
UV light-induced oxygen doping in graphitic carbon nitride with suppressed deep trapping for enhancement in CO2 photoreduction activity 认领 引用 被引量：3
5
作者 Xiaolong Zhao Xiaoping Yi +5 位作者 Wending Pan Yifei Wang Shijing Luo Yingguang Zhang Ruijie Xie Dennis Y.C.Leung 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2023年第2期135-144,共10页
While photoreduction of CO2 to CH 4 is an effective means of producing value-added fuels,common pho-tocatalysts have poor activity and low selectivity in photocatalytic CO2-reduction processes.Even though creati... While photoreduction of CO2 to CH 4 is an effective means of producing value-added fuels,common pho-tocatalysts have poor activity and low selectivity in photocatalytic CO2-reduction processes.Even though creating defects is an effective photocatalyst fabrication route to improve photocatalytic activity,there are some challenges with the facile photocatalyst synthesis method.In this work,an O element is in-troduced into a graphitic carbon nitride(CN)skeleton through a precursory ultraviolet light irradiation pretreatment to increase the visible light absorption and enhance the carrier density of this modified non-metal CN photocatalyst;the charge transfer dynamics thereof are also studied through electrochem-ical tests,photoluminescence spectroscopy,and nanosecond transient absorption.We verify that the op-timized sample exhibits lower charge recombination and a suppressed 84 ns electron-trapping lifetime,compared to the 103 ns electron-trapping lifetime of the CN counterpart,and thereby contributes to ro-bust detrapping and a fast transfer of active electrons.Through density functional theory calculations,we find that the improved light absorption and increased electron density are ascribed to O-element doping,which enhances the CO2 adsorption energy and improves the CO2-to-CH 4 photoreduction activity;it be-comes 17 times higher than that of the bare CN,and the selectivity is 3.8 times higher than that of CN.Moreover,the optimized sample demonstrates excellent cyclic stability in a 24-hour cycle test. 展开更多
关键词 UV light Oxygen doping Charge transfer Graphitic carbon nitride CO2reduction
暂未订购 下载PDF
Flexible impedance sensor based on Ti3C2TxMXene and graphitic carbon nitride nanohybrid for humidity-sensing application with ultrahigh response 认领 引用 被引量：9
6
作者 Yang Lu Meng-Yu Wang +5 位作者 Dong-Yue Wang Yue-Hang Sun Zi-Hao Liu Rong-Ke Gao Lian-Dong Yu Dong-Zhi Zhang 《Rare Metals》 SCIE EI CAS CSCD 2023年第7期2204-2213,共10页
This paper reported the impedance-type humidity sensor based on Ti3C2Tx/g-C3N4nanomaterials which was fabricated on a flexible polyethylene terephthalate(PET)substrate.The scanning electron microscopy(S... This paper reported the impedance-type humidity sensor based on Ti3C2Tx/g-C3N4nanomaterials which was fabricated on a flexible polyethylene terephthalate(PET)substrate.The scanning electron microscopy(SEM),X-ray diffraction(XRD),and X-ray photoelectron spectroscopy(XPS)measurements were used to demonstrate the successful synthesis and combination of Ti3C2Txand g-C3N4nanomaterials.The performance of the humidity sensor was tested at room temperature.The experimental results showed that the Ti3C2Txnanosheets with g-C3N4nanosheets endowed the humidity sensor with an ultra-high response,rapid responseecovery time,and negligible hysteresis.The complex impedance spectroscopy(CIS)and bode diagrams were used to further analyze the sensing mechanism of the Ti3C2Tx/g-C3N4humidity sensor.The Ti3C2Tx/g-C3N4humidity sensor can monitor skin humidity and high-humidity alarm,which demonstrates great potential applications in various fields. 展开更多
关键词 Ti3C2TxMXene Graphitic carbon nitride Flexible humidity sensor Humidity detection Alarm application
暂未订购 下载PDF
纳米TiO2对全水性环氧树脂防水涂料性能的影响 认领 引用
7
作者 王志强 廖国胜 +3 位作者 廖宜顺 梅军鹏 刘帆 陈乐舟 《广州化学》 CAS 2026年第4期84-88,I0004,共5页
以水性环氧树脂为基础原料,通过加入不同添加量的金红石型纳米TiO2、水性环氧固化剂及消泡剂等助剂,制备一种改性全水性环氧树脂防水涂料。研究了纳米TiO2添加量对防水涂料初始粘度、固含量、干燥时间、抗冲击性、柔韧性、铅笔硬度等性... 以水性环氧树脂为基础原料,通过加入不同添加量的金红石型纳米TiO2、水性环氧固化剂及消泡剂等助剂,制备一种改性全水性环氧树脂防水涂料。研究了纳米TiO2添加量对防水涂料初始粘度、固含量、干燥时间、抗冲击性、柔韧性、铅笔硬度等性能的影响。并对全水性环氧树脂防水涂料涂层进行标准养护、浸水、浸碱、浸酸、冻融循环、热老化、紫外线试验,测试其拉伸粘结强度及耐候性。同时采用扫描电镜(SEM)观察了不同TiO2添加量下防水涂料的涂层表面微观形貌。结果表明,纳米TiO2的加入对涂料的综合性能均有不同程度的提高,当纳米TiO2添加量为树脂质量的3%时,综合性能达到最佳。 展开更多
关键词 纳米TiO2 全水性环氧树脂 防水涂料 吸水率 拉伸强度 耐候性
暂未订购 下载PDF
Au负载量对TiO2/Au光阳极光吸收能力的影响研究 认领 引用
8
作者 聂宗昊 闫伯涵 +1 位作者 祝孝栋 李秀玉 《应用物理》 2026年第5期456-464,共9页
为了研究Au负载量对TiO2/Au光阳极的光吸收能力的影响,本文采用水热法和柠檬酸钠还原法制备了TiO2/Au材料,通过刮涂法制备光阳极。利用紫外–可见吸收、X射线衍射(XRD)、透射电子显微镜(TEM)等手段对不同Au负载量的TiO2/Au材料和TiO2/A... 为了研究Au负载量对TiO2/Au光阳极的光吸收能力的影响,本文采用水热法和柠檬酸钠还原法制备了TiO2/Au材料,通过刮涂法制备光阳极。利用紫外–可见吸收、X射线衍射(XRD)、透射电子显微镜(TEM)等手段对不同Au负载量的TiO2/Au材料和TiO2/Au光阳极进行表征分析。结果表明,Au负载量在1.0 wt%时,TiO2/Au光阳极的光吸收能力最佳;低于1.0 wt%时,Au负载量提高,TiO2/Au光阳极的光吸收能力也随之提高;高于1.0 wt%时,Au负载量提高,TiO2/Au光阳极的光吸收能力随之降低。 展开更多
关键词 光阳极 TiO2 Au纳米颗粒 N719染料
暂未订购 下载PDF
NiO修饰梯度对金红石相TiO2基MEMS氢敏传感器性能的优化研究 认领 引用
9
作者 刘锦涛 鲍钰文 李晓博 《材料科学》 2026年第1期129-136,共8页
针对金红石相TiO2氢敏传感器存在的响应不足及选择性差的问题,本研究通过构建p-n异质结,开发了一种高性能的氢敏材料。采用水热法制备了不同NiO修饰量(1%~8%)的TiO2复合粉末,借助XPS、SEM等表征手段分析其结构形貌,并结合MEMS微热板器... 针对金红石相TiO2氢敏传感器存在的响应不足及选择性差的问题,本研究通过构建p-n异质结,开发了一种高性能的氢敏材料。采用水热法制备了不同NiO修饰量(1%~8%)的TiO2复合粉末,借助XPS、SEM等表征手段分析其结构形貌,并结合MEMS微热板器件测试气敏性能。结果表明,2% NiO修饰样品在391˚C下对1000 ppm氢气的响应值为金红石相TiO2的1.5倍,且对乙醇、CO等干扰气体具有优异选择性。本研究为高性能氢敏传感器的开发提供了有效的材料优化策略。 展开更多
关键词 金红石TiO2 NiO修饰梯度 P-N异质结 氢气传感 MEMS传感器 气敏机理
暂未订购 下载PDF
Elevated temperature resilience of pouch LiNi0.8Co0.1Mn0.1O2/graphite batteries through siloxane-induced cathode electrolyte interphase optimization 认领 引用
10
作者 Xiang Gao Peiqi Zhou +6 位作者 Haijia Li Xueyi Zeng Xin He Weizhen Fan Wenlian Wang Zhen Ma Junmin Nan 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第5期202-213,共12页
As a potential candidate for high-energy lithium-ion batteries (LIBs),nickel-rich cathodes encounter significant challenges due to structural instability arising from interphases.In this work,tris(ethenyl)-tris(etheny... As a potential candidate for high-energy lithium-ion batteries (LIBs),nickel-rich cathodes encounter significant challenges due to structural instability arising from interphases.In this work,tris(ethenyl)-tris(ethenyl)silyloxysilane (HVDS) with Si–O bonds and unsaturated bonds is introduced as additive designing functional electrolyte to enhance the long-cycle stability of LiNi0.8Co0.1Mn0.1O2(NCM811)/graphite LIBs at elevated temperature.The preferential oxidization and component of HVDS facilitate the generation of an extremely robust and ultra-thin cathode electrolyte interphase (CEI) comprising a chemically bonded silane polymer.This interphase effectively suppresses side-reactions of electrolyte,mitigates HF erosion,and reduces irreversible phase transitions.Benefiting from the above merits,the batteries’capacity retention shows a remarkable increase from 20% to 92% after nearly 1550 cycles conducted at room temperature.And under elevated temperature conditions (45℃),the capacity retention remains 80%after 670 cycles,in comparison to a drop to 80%after only 250 cycles with the blank electrolyte.These findings highlight HVDS’s potential to functionalize the electrolyte,marking a breakthrough in improving the longevity and reliability of NCM811/graphite LIBs under challenging conditions. 展开更多
关键词 High temperature performance Tris(ethenyl)-tris(ethenyl)silyloxysilane additive LiNi0.8Co0.1Mn0.1O2/graphite battery Cathode electrolyte interphase
暂未订购 下载PDF
激光粒度仪测疏水型TiO2粒径的研究 认领 引用
11
作者 相阳 田晨毅 +2 位作者 金园平 束阳 潘媛媛 《广州化工》 CAS 2026年第16期118-121,140,共4页
粒径分布是影响钛白粉应用性能最重要的指标之一,然而疏水型钛白粉因为它的表面经过有机处理,在水中分散困难,极易团聚,给激光粒度仪粒径测试带来巨大挑战。本研究选用不同的分散介质和分散剂,在浓度、超声分散及其他测试条件都相同的... 粒径分布是影响钛白粉应用性能最重要的指标之一,然而疏水型钛白粉因为它的表面经过有机处理,在水中分散困难,极易团聚,给激光粒度仪粒径测试带来巨大挑战。本研究选用不同的分散介质和分散剂,在浓度、超声分散及其他测试条件都相同的情况下,采用Bettersize3000激光粒度仪进行对比实验,以粒径分布图的峰型、粒径平均值(D50)、粒度分布,结合TEM透射电镜对测试结果进行评价。结果表明,以无水乙醇为分散介质,并加入适量的BYK-111分散剂,超声分散5 min,有效的破坏疏水型钛白粉的团聚体,获得分散良好、重复性高的粒径测试结果,可为企业开展品质管控及产品研发提供更好的技术支持。 展开更多
关键词 Bettersize3000激光粒度仪 TiO2粒度分布 分散剂 影响因素
暂未订购 下载PDF
TiO2光催化技术处理印染废水的研究进展 认领 引用 被引量：10
12
作者 任敬 宗刚 +1 位作者 谢涛 景张欣 《化工新型材料》 CAS CSCD 北大核心 2025年第3期83-87,共5页
综述了二氧化钛(TiO2)光催化技术处理印染废水的研究进展,重点介绍了TiO2材料的改性方法,主要包括掺杂改性、材料负载、光敏化及半导体材料复合改性,并讨论了不同改性方法对TiO2结构和性能的影响。在此基础上,对TiO2光催化... 综述了二氧化钛(TiO2)光催化技术处理印染废水的研究进展,重点介绍了TiO2材料的改性方法,主要包括掺杂改性、材料负载、光敏化及半导体材料复合改性,并讨论了不同改性方法对TiO2结构和性能的影响。在此基础上,对TiO2光催化技术处理印染废水的研究前景进行了展望。 展开更多
关键词 印染废水 TiO2改性 光催化
暂未订购 下载PDF
A scalable approach to Na4Fe3(PO4)2P2O7@carbon/expanded graphite as cathode for ultralong-lifespan and low-temperature sodium-ion batteries 认领 引用 被引量：3
13
作者 Zheng Li Fangkun Li +9 位作者 Xijun Xu Jun Zeng Hangyu Zhang Lei Xi Yiwen Wu Linwei Zhao Jiahe Chen Jun Liu Yanping Huo Shaomin Ji 《Chinese Chemical Letters》 SCIE CAS CSCD 2025年第10期616-622,共7页
Mixed polyanion phosphate Na4Fe3(PO4)2P2O7(NFPP)is regarded as the most promising cathode material for sodium-ion batteries(SIBs),due to its high structural stability and low-cost environmental frien... Mixed polyanion phosphate Na4Fe3(PO4)2P2O7(NFPP)is regarded as the most promising cathode material for sodium-ion batteries(SIBs),due to its high structural stability and low-cost environmental friendliness.However,its intrinsic low conductivity and sluggish Na+diffusion restricted the fast-charge and low-temperature sodium storage.Herein,an NFPP composite encapsulated by in-situ pyrolytic carbon and coupled with expanded graphite(NFPP@C/EG)was constructed via a sol-gel method followed by a ballmill procedure.Due to the dual-carbon modified strategy,this NFPP@C/EG only enhanced the electronic conductivity,but also endowed more channels for Na+diffusion.As cathode for SIBs,the optimized NFPP(M-NFPP@C/EG)delivers excellent rate capability(capacity of~80.5 mAh/g at 50 C)and outstanding cycling stability(11000 cycles at 50 C with capacity retention of 89.85%).Additionally,cyclic voltammetry(CV)confirmed that its sodium storage behavior is pseudocapacitance-controlled,with in-situ electrochemical impedance spectroscopy(EIS)further elucidating improvements in electrode reaction kinetics.At lower temperatures(0℃),M-NFPP@C/EG demonstrated exceptional cycling performance(8800 cycles at 10 C with capacity retention of 95.81%).Moreover,pouch cells also exhibited excellent stability.This research demonstrates the feasibility of a dual carbon modification strategy in enhancing NFPP and proposes a low-cost,high-rate,and ultra-stable cathode material for SIBs. 展开更多
关键词 Na4Fe3(PO4)2P2O7 Expanded graphite Dual-carbon modified Polyanionic compounds cathode Sodium-ion batteries
暂未订购 下载PDF
Enhancing Alkaline Hydrogen Evolution Reaction on Ru- Decorated TiO2 Nanotube Layers: Synergistic Role of Ti3+, Ru Single Atoms, and Ru Nanoparticles 认领 引用 被引量：2
14
作者 Sitaramanjaneya Mouli Thalluri Jhonatan Rodriguez-Pereira +7 位作者 Jan Michalicka Eva Kolíbalová Ludek Hromadko Stanislav Slang Miloslav Pouzar Hanna Sopha Raul Zazpe Jan M.Macak 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2025年第3期191-198,共8页
Synergistic interplays involving multiple active centers originating from TiO2 nanotube layers(TNT)and ruthenium(Ru)species comprising of both single atoms(SAs)and nanoparticles(NPs)augment the alkaline hydrogen evolu... Synergistic interplays involving multiple active centers originating from TiO2 nanotube layers(TNT)and ruthenium(Ru)species comprising of both single atoms(SAs)and nanoparticles(NPs)augment the alkaline hydrogen evolution reaction(HER)by enhancing Volmer kinetics from rapid water dissociation and improving Tafel kinetics from efficient H*desorption.Atomic layer deposition of Ru with 50 process cycles results in a mixture of Ru SAs and 2.8-0.4 nm NPs present on TNT layers,and it emerges with the highest HER activity among all the electrodes synthesized.A detailed study of the Ti and Ru species using different high-resolution techniques confirmed the presence of Ti3+states and the coexistence of Ru SAs and NPs.With insights from literature,the role of Ti3+,appropriate work functions of TNT layers and Ru,and the synergistic effect of Ru SAs and Ru NPs in improving the performance of alkaline HER were elaborated and justified.The aforementioned characteristics led to a remarkable performance by having 9mV onset potentials and 33 mV dec-1 of Tafel slopes and a higher turnover frequency of 1.72 H2 s-1 at 30 mV.Besides,a notable stability from 28 h staircase chronopotentiometric measurements for TNT@Ru surpasses TNT@Pt in comparison. 展开更多
关键词 alkaline hydrogen evolution reaction ruthenium nanoparticles ruthenium single atoms TiO2 nanotube layers water dissociation
暂未订购 下载PDF
三维TiO2/石墨烯气凝胶的自组装制备及其电容性能 认领 引用 被引量：1
15
作者 王艳坤 张建民 王一帆 《化工新型材料》 CAS CSCD 北大核心 2025年第12期96-102,115,共7页
将氧化石墨烯纳米片与Ti(OH)4纳米颗粒通过溶胶静电自组装,然后水热还原和真空冷冻干燥处理制备了三维分层结构的TiO2/还原氧化石墨烯气凝胶(TGAs)。通过X射线衍射、热重、傅里叶变换红外光谱、拉曼光谱、X射线光电子能谱、氮气吸附... 将氧化石墨烯纳米片与Ti(OH)4纳米颗粒通过溶胶静电自组装,然后水热还原和真空冷冻干燥处理制备了三维分层结构的TiO2/还原氧化石墨烯气凝胶(TGAs)。通过X射线衍射、热重、傅里叶变换红外光谱、拉曼光谱、X射线光电子能谱、氮气吸附脱附实验、场发射扫描电镜和透射电镜对其微观结构、组成和形貌进行了表征。采用循环伏安、恒流充放电、电化学阻抗谱和循环稳定性等电化学方法对其超级电容性能进行了评估。结构分析显示TGAs呈现典型的三维分级多孔结构及具有高比表面积(287.4m2/g)。在1mol/L Na2SO4电解液中,该材料在扫速为5mV/s时表现出高达268.3F/g的比电容。此外,该材料还表现出优异的循环稳定性,经3000次循环后比电容保持率仍保持在93%左右,表明其在高性能超级电容器电极材料方面具有良好的应用前景。 展开更多
关键词 TiO 2 石墨烯 气凝胶 静电自组装 超级电容器
暂未订购 下载PDF
包覆TiO2保护层抑制磷化镍钴在水中腐蚀 认领 引用 被引量：1
16
作者 杨博 吕功煊 马建泰 《无机化学学报》 SCIE CAS CSCD 北大核心 2025年第2期365-384,共20页
本工作研究了镍钴双金属磷化物(Ni-Co-P)在水溶液中的稳定性。结果显示,Ni-Co-P能与H2O反应,发生自腐蚀生成Ni2+、Co2+和PO43-离子,同时产生H2。Ni-Co-P与H2O的自腐蚀反应速率受到镍钴比例影响,Ni-Co-P中的Co含量升高,... 本工作研究了镍钴双金属磷化物(Ni-Co-P)在水溶液中的稳定性。结果显示,Ni-Co-P能与H2O反应,发生自腐蚀生成Ni2+、Co2+和PO43-离子,同时产生H2。Ni-Co-P与H2O的自腐蚀反应速率受到镍钴比例影响,Ni-Co-P中的Co含量升高,其在水中的腐蚀速率降低。详细研究了镍、钴投料比(nNiCo)为1∶2制备的Ni-Co-P在水中的腐蚀行为,其在水中的腐蚀速率与溶液pH值、氧气含量、光照、温度等因素有关。为了抑制Ni-Co-P(nNiCo=1/2)在水溶液中的腐蚀,在其表面包裹一层惰性TiO2保护层,这层TiO2保护层能有效减缓Ni-Co-P在水中的腐蚀,增强其稳定性。 展开更多
关键词 双金属磷化物 水溶液 稳定性 TiO2保护层
暂未订购 下载PDF
Effect of WS_2 addition on electrical sliding wear behaviors of Cu-graphite-WS_2 composites 认领 引用 被引量：8
17
作者 钱刚 凤仪 +3 位作者 陈阳明 莫飞 王雨晴 刘文宏 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第6期1986-1994,共9页
Four kinds of Cu-based composites with different mass ratios of graphite and WS2 as lubricants were fabricated by hot-pressing method. Electrical sliding wear behaviors of the composites were investigated using a bloc... Four kinds of Cu-based composites with different mass ratios of graphite and WS2 as lubricants were fabricated by hot-pressing method. Electrical sliding wear behaviors of the composites were investigated using a block-on-ring tribometer rubbing against Cu-5%Ag alloy ring. The results demonstrated that 800 ~C was the optimum sintering temperature for Cu-graphite-WS2 dual-lubricant composites to obtain the best comprehensive properties of mechanical strength and lubrication performance. Contact voltage drops of the Cu-based composites increased with increasing the mass ratio of WS2 to graphite. The Cu-based composite with 20% graphite and 10% WS2 showed the best wear resistance due to the excellent synergetic lubricating effect of graphite and WS2. The reasonable addition of WS2 into the Cu-graphite composite can remarkably improve the wear resistance without much rise of electrical energy loss which provides a novel principle of designing suitable sliding electrical contact materials for industrial applications. 展开更多
关键词 Cu-based composites graphite WS2 synergetie lubrication wear rate contact voltage drop
暂未订购 下载PDF
Absorption and Photocataly tic Degradation of Machine Oil by Exfoliated Graphite-Supported Nanometer TiO2 Material 认领 引用 被引量：2
18
作者 CAO Hong MA Enbao +2 位作者 WANG Xuehua CHEN Jiazang BIN Xiaobei 《Acta Geologica Sinica(English Edition)》 SCIE CAS 2006年第2期285-289,共5页
By loading nanometer anatase onto exfoliated graphite with the sol-gel method, exfoliated graphite-TiO2 composite （EG-TiO2） can be prepared, which can adsorb oil and can also degrade oil. In a technologic condition ... By loading nanometer anatase onto exfoliated graphite with the sol-gel method, exfoliated graphite-TiO2 composite （EG-TiO2） can be prepared, which can adsorb oil and can also degrade oil. In a technologic condition for preparing EG-TiO2, the impregnated number of times is the most important factor to influence oil-adsorbing capability, that is, when the impregnated number of times increases, the amount of saturation-adsorbed oil decreases. The study of EG-TiO2 photocatalytic degradation of machine oil based on the weight-loss method and infrared spectrum method indicates that EG-TiO2 has obvious effect of photocatalytic degradation for machine oil. Its performance is superior to pure nanometer TiO2 powder because nanometer TiO2 in EG-TiO2 has three-dimension laminar structure and comparatively high adsorption capability. 展开更多
关键词 exfoliated graphite nanometer TiO2 photocatalysis degradation machine oil
暂未订购 下载PDF
Formation of NiFe_2O_4/Expanded Graphite Nanocomposites with Superior Lithium Storage Properties 认领 引用 被引量：11
19
作者 Yinglin Xiao Jiantao Zai +1 位作者 Bingbing Tian Xuefeng Qian 《Nano-Micro Letters》 SCIE EI CAS 2017年第3期101-108,共8页
A Ni Fe_2O_4/expanded graphite(Ni Fe_2O_4/EG)nanocomposite was prepared via a simple and inexpensive synthesis method. Its lithium storage properties were studied with the goal of applying it as an anode in a lithium-... A Ni Fe_2O_4/expanded graphite(Ni Fe_2O_4/EG)nanocomposite was prepared via a simple and inexpensive synthesis method. Its lithium storage properties were studied with the goal of applying it as an anode in a lithium-ion battery. The obtained nanocomposite exhibited a good cycle performance, with a capacity of 601 m Ah g-1at a current of 1 A g-1after 800 cycles. This good performance may beattributed to the enhanced electrical conductivity and layered structure of the EG. Its high mechanical strength could postpone the disintegration of the nanocomposite structure,efficiently accommodate volume changes in the Ni Fe_2O_4-based anodes, and alleviate aggregation of Ni Fe_2O_4 nanoparticles. 展开更多
关键词 NiFe2O4 Expanded graphite Anode materials Lithium-ion batteries
暂未订购 下载PDF
Constructing graphite-CeO2interfaces to enhance the photothermal activity for solar-driven dry reforming of methane 认领 引用
20
作者 LI Ruitao GONG Kun +3 位作者 DAI Yuanyuan NIU Qiang LIN Tiejun ZHONG Liangshu 《燃料化学学报（中英文）》 EI CAS CSCD 北大核心 2025年第8期1137-1147,共11页
CeO2 based semiconductor are widely used in solar-driven photothermal catalytic dry reforming of methane(DRM)reaction,but still suffer from low activity and low light utilization efficiency.This study developed gra... CeO2 based semiconductor are widely used in solar-driven photothermal catalytic dry reforming of methane(DRM)reaction,but still suffer from low activity and low light utilization efficiency.This study developed graphite-CeO2 interfaces to enhance solar-driven photothermal catalytic DRM.Compared with carbon nanotubes-modified CeO2(CeO2-CNT),graphite-modified CeO2(CeO2-GRA)constructed graphite-CeO2 interfaces with distortion in CeO2,leading to the formation abundant oxygen vacancies.These graphite-CeO2 interfaces with oxygen vacancies enhanced optical absorption and promoted the generation and separation of photogenerated carriers.The high endothermic capacity of graphite elevated the catalyst surface temperature from 592.1−691.3℃,boosting light-to-thermal conversion.The synergy between photogenerated carriers and localized heat enabled Ni/CeO2-GRA to achieve a CO production rate of 9985.6 mmol/(g·h)(vs 7192.4 mmol/(g·h)for Ni/CeO2)and a light-to-fuel efficiency of 21.8%(vs 13.8%for Ni/CeO2).This work provides insights for designing graphite-semiconductor interfaces to advance photothermal catalytic efficiency. 展开更多
关键词 dry reforming of methane photothermal catalysis CeO2 graphite interfaces
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 250 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈