Beneficial effects of rhodium and tin oxide on carbon supported platinum catalysts for ethanol electrooxidation

被引：49

作者：

Soares, Layciane A. ^{[1
]}

Morais, Claudia ^{[2
]}

Napporn, Teko W. ^{[2
]}

Kokoh, K. Boniface ^{[2
]}

Olivi, Paulo ^{[1
]}

机构：

[1] Univ Sao Paulo, Dept Quim, Fac Filosofia Ciencias & Letras Ribeirao Preto, Ave Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP, Brazil

[2] Univ Poitiers, UMR CNRS 7285, 4,Rue Michel Brunet,B27,TSA 51106, F-86073 Poitiers 09, France

来源：

JOURNAL OF POWER SOURCES | 2016年 / 315卷

基金：

巴西圣保罗研究基金会;

关键词：

Pechini method; Microwave-assisted method; Ethanol electrooxidation; Electrocatalysis; PEM FUEL-CELLS; ELECTROCATALYTIC ACTIVITY; INFRARED-SPECTROSCOPY; BIMETALLIC CATALYSTS; METHANOL OXIDATION; ALKALINE MEDIA; PT-RH; CO; NANOPARTICLES; SURFACES;

D O I：

10.1016/j.jpowsour.2016.03.013

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：

This work investigates ethanol electrooxidation on Pt/C, PtxRhy/C, Pt-SnO2/C, and PtxRhy-SnO2/C catalysts synthesized by the Pechini and microwave-assisted polyol methods. The catalysts are characterized by energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), and X-ray diffraction (XRD) techniques. The electrochemical properties of these electrode materials are examined by cyclic voltammetry and chronoamperometry experiments in acid medium. The products obtained during ethanol electrolysis are identified by high performance liquid chromatography (HPLC). The adsorbed intermediates are evaluated by an in situ reflectance Infrared Spectroscopy technique combined with cyclic voltammetry. Catalysts performance in a direct ethanol fuel cell (DEFC) is also assessed. The electrical performance of the electrocatalysts in a single DEFC at 80 degrees C decreases in the following order Pt70Rh30SnO2 > Pt80Rh20SnO2 > Pt60Rh40SnO2 similar to PtSnO2 > PtxRhy similar to Pt, showing that the presence of SnO2 enhances the ability of Pt to catalyze ethanol electrooxidation. (C) 2016 Elsevier B.V. All rights reserved.

引用

页码：47 / 55

页数：9

共 49 条

[1] An Optimization Study of PtSn/C Nanocatalysts Prepared by Microwave-assisted Heating and Their Application in Direct Ethanol Fuel Cell: A Comparative Study of PtSn/C Nanocatalysts [J].