Electrochemical Quartz Crystal Microbalance(EQCM) Characterization of Electrodeposition and Catalytic Activity of Pd-based Electrocatalysts for Ethanol Oxidation

作     者：KE Xi DENG Lu-lu SHEN Pei-kang CUI Guo-feng 

作者机构：State Key Laboratory of Optoelectronic Materials and Technologies School of Physics and Engineering School of Chemistry and Chemical Engineering Sun Yat-Sen University Guangzhou 510275 P. R. China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2010年第26卷第3期

页      面：443-448页

核心收录：

学科分类：081702[工学-化学工艺] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070302[理学-分析化学] 0703[理学-化学] 

基　　金：Supported by the Guangdong Science and Technology Key Projects, China(Nos.2007A010700001, 2007B090400032) Guangzhou Science and Technology Key Projects, China(Nos.2007Z1-D0051, SKT17-11) the Scientific Research Foundation for Young Teachers of the Sun Yat-Sen University, China(No.2006-31000-1131214) 

主　　题：Coulombic efficiency Nucleation and growth mechanism Electrochemical quartz crystal microbalance Palladium Ethanol oxidation 

摘      要：Pd was electrochemically deposited on gold-coated quartz crystals at nanogram-level. The coulombic efficiency and initial nucleation and growth mechanism of potentiostatic Pd deposition were investigated via in situ electrochemical quartz crystal microbalance（EQCM）. The coulombic efficieneies are 84%, 93% and 95% for Pd deposition at 0.3, 0.2 and 0.1 V（vs. SCE）, respectively. The results of chronoamperometric measurements show that the Pd deposition proceeded by an instantaneous nucleation（at 0.3 V） or progressive nucleation（at 0.2 and 0.1 V） in a three-dimensional（3D） growth mode. The catalytic activity of Pd-based electrocatalyst for ethanol oxidation was characterized in an alkaline solution. It was found that the highest mass activity for ethanol oxidation on Pd-based electrocatalyst is 1.8× 10^4 A/（g Pd） deposited at 0.3 V for 5 s.