Preparation and characterization of carbon-supported PtTi alloy electrocatalysts

被引：55

作者：

Ding, Errun ^{[1
]}

More, Karren L. ^{[2
]}

He, Ting ^{[1
]}

机构：

[1] Honda Res Inst USA Inc, Columbus, OH 43212 USA

[2] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

来源：

JOURNAL OF POWER SOURCES | 2008年 / 175卷 / 02期

关键词：

PtTi; electrocatalysts; alloys; oxygen reduction reaction; nanoparticles;

D O I：

10.1016/j.jpowsour.2007.10.010

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：

Carbon-supported PtTi alloy nanoparticles with well-controlled particle size, dispersity, and composition uniformity, have been synthesized by thermal decomposition and reduction of Pt and Ti precursors at elevated temperatures. The synthesized alloy nanoparticles were characterized by X-ray diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, and energy-dispersive spectroscopy. The catalytic activities of these alloys towards molecular oxygen electro-reduction were screened by the hydrodynamic RDE technique. Among the compositions tested, Pt75Ti25 displayed the highest catalytic activity and had a twofold improvement in catalytic performance as compared to a benchmark Pt/C catalyst. (C) 2007 Elsevier B.V. All rights reserved.

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页码：794 / 799

页数：6

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