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金修饰纳米多孔Pd催化剂对甲酸氧化的电催化活性
引用本文:牛凤娟,易清风,刘云清.金修饰纳米多孔Pd催化剂对甲酸氧化的电催化活性[J].中国有色金属学报,2011(8).
作者姓名:牛凤娟  易清风  刘云清
作者单位:湖南科技大学化学化工学院;中南大学化学化工学院;
基金项目:国家自然科学基金资助项目(20876038); 湖南省科技发展项目(2009GK3084); 湖南省自然科学省市联合基金资助项目(10JJ9003)
摘    要:以水热法制备出纳米多孔网状钯催化剂(nanoPd),采用电位扫描在其上沉积金,制成金修饰纳米钯电极(Au/nanoPd),运用循环伏安法(CV)、线性扫描(LSV)和交流阻抗谱(EIS)比较nanoPd和Au/nanoPd电极对甲酸氧化反应的电催化活性。CV和LSV结果表明:金在nanoPd表面的沉积促进钯对甲酸氧化的电催化活性,起始电位提前,电流密度更高。EIS研究结果也表明:在Au/nanoPd电极上,甲酸氧化反应的电荷传递电阻更低。结果表明:金修饰纳米钯电极(Au/nanoPd)对甲酸氧化具有较高的电催化活性。

关 键 词:纳米钯  金修饰  甲酸氧化  燃料电池  

Electrocatalytic activity of Au modified nanoporous palladium electrode for formic acid oxidation
NIU Feng-juan,YI Qing-feng,LIU Yun-qing.Electrocatalytic activity of Au modified nanoporous palladium electrode for formic acid oxidation[J].The Chinese Journal of Nonferrous Metals,2011(8).
Authors:NIU Feng-juan  YI Qing-feng  LIU Yun-qing
Institution:NIU Feng-juan1,YI Qing-feng1,LIU Yun-qing2 (1.School of Chemistry and Chemical Engineering,Hunan University of Science and Technology,Xiangtan 411201,China,2.School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China)
Abstract:A novel nanoporous network palladium electrode(nanoPd) was successfully prepared by a hydrothermal method,then a gold-modified nanoparticle palladium electrode(Au/nanoPd) was subsequently fabricated through electrodepositing gold on the nanoPd electrode using a potential scan process.The electrocatalytic activities of the nanoPd and Au/nanoPd towards formic acid in alkaline solution were evaluated by cyclic voltammetry(CV) and electrochemical impedance spectroscopy(EIS).CV results reveal that Au/nanoPd pres...
Keywords:nanoporous palladium  gold-modified  formic acid oxidation  fuel cell  
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