摘要
钯催化剂对碱性溶液的乙醇电催化氧化反应表现较好的催化活性.本文通过简单的化学沉积法,将钯原子成功修饰到金纳米颗粒表面,制备的催化剂对乙醇电催化氧化反应表现出比钯更好的催化性能.研究发现,钯原子不均匀地覆盖在金核表面,部分金原子暴露在外层.制备的催化剂的峰电流密度是钯催化剂的4.6倍,起始电势低100 m V.该催化剂较好的催化性能可能归因于金核的电子效应和表面双功能电催化反应机制.
Palladium(Pd) is a good catalyst for ethanol electro-oxidation in alkaline solutions.The activity of Pd is further improved in this study by modifying the gold(Au) nanoparticles with Pd adatoms using a simple spontaneous deposition process.The Pd overlayer on the Au core(Au@Pd) is un-uniform with some Au atoms exposed to the electrolyte.The activity of Au@Pd/C toward ethanol oxidation reaction(EOR) is much higher than that of Pd/C in an alkaline solution.The peak current density of Au@Pd/C is 4.6 times higher than that of Pd/C with a 100 mV lower onset potential.The enhanced activity may be due to the electronic effect from the Au core,and the bifunctional reaction mechanism.
作者
陈慧梅
朱尚乾
黄加乐
邵敏华
CHEN Hui-mei;ZHU Shang-qian;HUANG Jia-le;SHAO Min-hua(Department of Pharmaceutical Engineering,Zhejiang Pharmaceutical College,Ningbo 315100,Zhejiang, P.R.China;Department of Chemical and Biological Engineering,The Hong Kong University of Science and Technology,Clear Water Bay,Kowloon,Hong Kong 999077,P.R.China;Department of Chemical and Biochemical Engineering,College of Chemistry and Chemical Engineering, Xiamen University,Xiamen 361005,Fujian,P.R.China)
出处
《电化学》
CAS
CSCD
北大核心
2018年第6期740-747,共8页
Journal of Electrochemistry
基金
support from Research Grant Council(No.26206115) of the Hong Kong Special Administrative Region
Scientific Research Fund of Zhejiang Provincial Education Department(No.Y201840545).
作者简介
Corresponding author,邵敏华,Tel:(+852)34692269,E-mail:kemshao@ust.hk.
