Platinum decorated Ru/C: Effects of decorated platinum on catalyst structure and performance for the methanol oxidation reaction

被引：23

作者：

Gao, Haili ^{[1
]}

Liao, Shijun ^{[1
]}

Zeng, Jianhuang ^{[1
]}

Xie, Yichun ^{[1
]}

机构：

[1] S China Univ Technol, Sch Chem & Chem Engn, Guangzhou 510641, Guangdong, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 01期

关键词：

Catalysts; Platinum decoration; Ruthenium; Methanol oxidation; CORE-SHELL NANOPARTICLES; CARBON NANOTUBES; FUEL-CELLS; PTRU NANOPARTICLES; ALKALINE MEDIA; ELECTROCATALYSTS; ELECTROOXIDATION; REDUCTION; ELECTRODES;

D O I：

10.1016/j.jpowsour.2010.07.040

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：

Platinum decorated Ru/C catalysts are prepared by successive reduction of a platinum precursor on preformed Ru/C. Pt:Ru atomic ratios are varied from 0.13:1 to 0.81:1 to investigate the platinum decoration effects on the catalyst's structure and electrochemical performance towards the methanol oxidation reaction (MOR) at room temperature. The catalysts are extensively characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Ru@Pt/C catalysts show enhanced mass-normalized activity and specific activity for the MOR relative to Pt/C. For the anodic oxidation of methanol, the ratio of forward to reverse oxidation peak current R (I-f/I-b,) varies considerably: R decreases from 5.8 to 0.8 when the Pt:Ru ratio increases from 0.13:1 to 0.81:1. When the ratio of Pt:Ru is 0.42:1, R reaches 0.99 (close to that of Pt/C), and further increase of the Pt:Ru ratio leads to almost no decrease in R. Coincidentally, maximum mass-normalized activity is also obtained when Pt:Ru is 0.42:1. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：54 / 61

页数：8

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