Understanding the electrocatalysis of oxygen reduction on platinum and its alloys

被引：1034

作者：

Stephens, Ifan E. L. ^{[1
]}

Bondarenko, Alexander S. ^{[1
]}

Gronbjerg, Ulrik ^{[1
]}

Rossmeisl, Jan ^{[2
]}

Chorkendorff, Ib ^{[1
]}

机构：

[1] Tech Univ Denmark, Ctr Individual Nanoparticle Funct, Dept Phys, DK-2800 Lyngby, Denmark

[2] Tech Univ Denmark, Ctr Atom Scale Mat Design, Dept Phys, DK-2800 Lyngby, Denmark

来源：

ENERGY & ENVIRONMENTAL SCIENCE | 2012年 / 5卷 / 05期

基金：

新加坡国家研究基金会;

关键词：

DENSITY-FUNCTIONAL THEORY; SINGLE-CRYSTAL SURFACES; SCANNING-TUNNELING-MICROSCOPY; EVANS-POLANYI RELATION; MEMBRANE FUEL-CELLS; DEALLOYED PT-CU; IN-SITU; PARTICLE-SIZE; CATHODE CATALYST; MONOLAYER ELECTROCATALYSTS;

D O I：

10.1039/c2ee03590a

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The high cost of low temperature fuel cells is to a large part dictated by the high loading of Pt required to catalyse the oxygen reduction reaction (ORR). Arguably the most viable route to decrease the Pt loading, and to hence commercialise these devices, is to improve the ORR activity of Pt by alloying it with other metals. In this perspective paper we provide an overview of the fundamentals underlying the reduction of oxygen on platinum and its alloys. We also report the ORR activity of Pt5La for the first time, which shows a 3.5- to 4.5-fold improvement in activity over Pt in the range 0.9 to 0.87 V, respectively. We employ angle resolved X-ray photoelectron spectroscopy and density functional theory calculations to understand the activity of Pt5La.

引用

页码：6744 / 6762

页数：19

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