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Issue 5, 2012
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Understanding the electrocatalysis of oxygen reduction on platinum and its alloys

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Abstract

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.

Graphical abstract: Understanding the electrocatalysis of oxygen reduction on platinum and its alloys

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Publication details

The article was received on 30 Dec 2011, accepted on 24 Feb 2012 and first published on 07 Mar 2012


Article type: Perspective
DOI: 10.1039/C2EE03590A
Citation: Energy Environ. Sci., 2012,5, 6744-6762
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    Understanding the electrocatalysis of oxygen reduction on platinum and its alloys

    I. E. L. Stephens, A. S. Bondarenko, U. Grønbjerg, J. Rossmeisl and I. Chorkendorff, Energy Environ. Sci., 2012, 5, 6744
    DOI: 10.1039/C2EE03590A

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