High-Activity, Durable Oxygen Reduction Electrocatalyst: Nanoscale Composite of Platinum-Tantalum Oxyphosphate on Vulcan Carbon

被引：32

作者：

Garsany, Yannick ^{[1
,2
]}

Epshteyn, Albert ^{[1
]}

Purdy, Andrew P. ^{[1
]}

More, Karren L. ^{[3
]}

Swider-Lyons, Karen E. ^{[1
]}

机构：

[1] USN, Res Lab, Div Chem, Washington, DC 20375 USA

[2] EXCET INC, Springfield, VA 22151 USA

[3] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2010年 / 1卷 / 13期

关键词：

FUEL-CELLS; CATALYSTS; PEMFCS; ALLOY; PT/C; STABILITY; MOOX;

D O I：

10.1021/jz100681g

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：

A new oxygen reduction electrocatalyst for proton-exchange membrane fuel cells (PEMFCs) is synthesized by dispersing nanoscale Pt on a nanoscale tantalum oxyphosphate phase on a Vulcan carbon support, designated as Pt/[TaOPO4/VC]. Electrocatalytic activity is measured by the thin-film rotating disk electrode methodology in 0.1 M HClO4 electrolyte. The Pd[TaOPO4/VC] electrocatalyst has a high mass-specific activity of 0.46 A mg(Pt)(-1) compared to 0.20 A mg(Pt)(-1) for a Pt/Vulcan carbon standard and has met the 2015 DOE goal of 0.44 A mg(Pt)(-1). This tantalum-containing electrocatalyst is twice as durable as the standard Pt/carbon in terms of its loss of Pt electrochemical surface area after aggressive electrochemical cycling.

引用

页码：1977 / 1981

页数：5

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