Synthesis, characterization and electrochemical studies of nanostructured CaWO4 as platinum support for oxygen reduction reaction

被引：15
|
作者：
Farsi, Hossein [1 ,2 ]
Barzgari, Zahra [1 ]
机构：
[1] Univ Birjand, Dept Chem, Birjand 97175615, Iran
[2] Univ Birjand, Solar Energy Res Dept, Birjand, Iran
来源：
MATERIALS RESEARCH BULLETIN | 2014年 / 59卷
关键词：
Nanostructures; Chemical synthesis; Electrochemical measurements; Catalytic properties; PEM FUEL-CELL; THIN-FILMS; CATALYST SUPPORT; TUNGSTEN-OXIDE; MEMBRANE; CA; OXIDATION; SRWO4; SR; ELECTROCATALYST;
D O I：
10.1016/j.materresbull.2014.07.014
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In the present work, we employed nanostructured calcium tungstate as a supporting material for platinum, a well-known electrocatalyst for oxygen reduction. The co-precipitation method has been utilized to synthesize nanostructured calcium tungstate from aqueous solution. The structure and morphology of the obtained CaWO4 were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Preparation of the Pt/CaWO4-graphite catalyst was carried out by electrodeposition of Pt onto the surface of CaWO4/graphite electrode. The physical properties of the catalyst were determined by scanning electron microscopy analysis and energy dispersive X-ray (SEM/EDX). The electrochemical activity of the Pt/CaWO4-graphite for the oxygen reduction reaction (ORR) was investigated in acid solution by cyclic voltammetry measurements, linear sweep voltammetry, and electrochemical impedance spectroscopy. The results revealed that the Pt/CaWO4-graphite has higher electrocatalytic activity for oxygen reduction in comparison with Pt/graphite catalyst. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：261 / 266
页数：6
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