钯原子修饰的金纳米颗粒乙醇氧化电催化剂

doi:10.13208/j.electrochem.180841

摘要/Abstract

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 mV. 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.

关键词: 乙醇氧化, 核壳, 电催化作用, 燃料电池, 表面原子

Abstract: 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.

Key words: ethanol oxidation, core-shell, electrocatalysis, fuel cells, adatoms

中图分类号:

陈慧梅，朱尚乾，黄加乐，邵敏华. 钯原子修饰的金纳米颗粒乙醇氧化电催化剂[J]. 电化学（中英文）, 2018, 24(6): 740-747.

CHEN Hui-mei, ZHU Shang-qian, HUANG Jia-le, SHAO Min-hua. Palladium Adatoms on Gold Nanoparticles as Electrocatalysts for Ethanol Electro-Oxidation in Alkaline Solutions[J]. Journal of Electrochemistry, 2018, 24(6): 740-747.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.180841

https://electrochem.xmu.edu.cn/CN/Y2018/V24/I6/740

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