Electrocatalytic properties of carbon-supported Pt-Ru catalysts with the high alloying degree for formic acid electrooxidation

被引：75
作者：
Chen, Yu [1 ]
Zhou, Yiming [1 ]
Tang, Yawen [1 ]
Lu, Tianhong [1 ]
机构：
[1] Nanjing Normal Univ, Coll Chem & Environm Sci, Nanjing 210097, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 13期
基金：
中国国家自然科学基金;
关键词：
Pt-Ru/C catalyst; Formic acid electrooxidation; Alloying degree; Bifunctional mechanism; Electronic effect; METHANOL ELECTROOXIDATION; ETHANOL OXIDATION; NANOPARTICLES; TEMPERATURE; PLATINUM; MECHANISM; CO; DECOMPOSITION; REACTIVITY; DEPOSITION;
D O I：
10.1016/j.jpowsour.2010.01.054
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of carbon-supported bimetallic Pt-Ru catalysts with high alloying degree and different Pt/Ru atomic ratio have been prepared by a chemical reduction method in the H2O/ethanol/tetrahydrofuran (THF) mixture solvent. The structural and electronic properties of catalysts are characterized using X-ray reflection (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM). The electrooxidation of formic acid on these Pt-Ru nanoparticles are investigated by using cyclic voltammetry, chronoamperometry and CO-stripping measurements. The results of electrochemical measurements illustrate that the alloying degree and Pt/Ru atomic ratio of Pt-Ru catalyst play an important role in the electrocatalytic activity of the Pt-Ru/C catalyst for formic acid electrooxidation due to the bifunctional mechanism and the electronic effect. Since formic acid is an intermediate in the methanol electrooxidation on Pt electrode in acidic electrolyte, the observation provides an additional fundamental understanding of the structure-activity relationship of Pt-Ru catalyst for methanol electrooxidation. (C) 2010 Elsevier B.V. All rights reserved.
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收藏
页码：4129 / 4134
页数：6
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