Effect of oxidative heat-treatment on electrochemical properties and oxygen reduction reaction (ORR) activity of Pd-Co alloy catalysts

被引：55

作者：

Rahul, R. ^{[1
]}

Singh, R. K. ^{[1
]}

Neergat, M. ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Energy Sci & Engn, Bombay 400076, Maharashtra, India

来源：

JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2014年 / 712卷

关键词：

Heat-treatment; Pd oxide-based catalysts; Oxide reduction; ORR; ESA; PALLADIUM ELECTRODE; ELECTROCATALYSTS; ACID; NANOPARTICLES; PLATINUM; ELECTROREDUCTION; SIZE;

D O I：

10.1016/j.jelechem.2013.11.011

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Pd-Co catalysts of various compositions are subjected to heat-treatment in an oxygen-containing atmosphere (5% oxygen and 95% argon by volume) and the catalysts are found to form oxides. On exposure to electrochemical conditions, the oxides get reduced in the potential range of 0.05-0.4 V of the voltammogram and the voltammetric features of the heat-treated catalyst are comparable to that of the corresponding as-prepared catalyst of same composition. The trends in electrochemical surface area (ESA), current due to formation of adsorbed-oxygenated species and activity towards oxygen reduction reaction (ORR) with catalyst composition are similar and they are in the order of Pd << Pd1.5Co < PdCo < Pd6.3Co < Pd2Co < Pd3Co. The ORR activity of the catalyst subjected to the oxidative thermal treatment is higher than that of Pd and the corresponding as-prepared catalyst of same composition. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：223 / 229

页数：7

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