Structural and electrochemical characterization of carbon supported Pt-Pr catalysts for direct ethanol fuel cells prepared using a modified formic acid method in a CO atmosphere

被引：27

作者：

Corradini, Patricia Gon ^{[1
]}

Antolini, Ermete ^{[2
]}

Perez, Joelma ^{[1
]}

机构：

[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP, Brazil

[2] Scuola Sci Mat, I-16016 Genoa, Italy

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 28期

基金：

巴西圣保罗研究基金会;

关键词：

METHANOL OXIDATION; ELECTROOXIDATION; ELECTROCATALYSTS; SPECTROSCOPY; PERFORMANCE; PT-CEO2/C; ALCOHOLS; ALLOY; CERIA;

D O I：

10.1039/c3cp51183a

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：

Pt-Pr/C electrocatalysts were prepared using a modified formic acid method, and their activity for carbon monoxide and ethanol oxidation was compared to Pt/C. No appreciable alloy formation was detected by XRD analysis. By TEM measurements it was found that Pt particle size increases with an increasing Pr content in the catalysts and with decreasing metal precursor addition time. XPS measurements indicated Pt segregation on the catalyst surface and the presence of Pr2O3 and PrO2 oxides. The addition of Pr increased the electro-catalytic activity of Pt for both CO and CH3CH2OH oxidation. The enhanced activity of Pt-Pr/C catalysts was ascribed to both an electronic effect, caused by the presence of Pr2O3, and the bi-functional mechanism, caused by the presence of PrO2.

引用

页码：11730 / 11739

页数：10

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