Exploring the Lanthanide Contraction to Tune the Activity and Stability of Pt

Maria Escudero Escribano, Paolo Malacrida, Martin Hangaard Hansen, Ulrik Grønbjerg Vej-Hansen, Amado Andres Velazquez-Palenzuela, Vladimir Tripkovic, Jakob Schiøtz, Jan Rossmeisl, Ifan Stephens, Ib Chorkendorff

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Abstract

The high platinum loadings required to compensate for the slow kinetics of the oxygen reduction reaction (ORR) impede the widespread uptake of polymer electrolyte membrane fuel cells. In order to improve the ORR kinetics and reduce the Pt loading, we can tailor the electronic properties of the Pt surface atoms by means of alloying Pt with other metals. Researchers have intensively studied alloys of Pt with late transition metals such as Ni and Co during the last decades. However, these compounds typically degrade under fuel cell reaction conditions, due to dealloying. In contrast, alloys of Pt and lanthanides present very negative enthalpy of formation [1,2], which should increase their resistance to degradation.
Original languageEnglish
Article number2403
JournalElectrochemical Society. Meeting Abstracts (Online)
VolumeMA2016-02
ISSN2151-2043
Publication statusPublished - 2016
EventPRiME 2016/230th ECS Meeting - Honolulu, United States
Duration: 2 Oct 20167 Oct 2016
http://prime-intl.org/

Conference

ConferencePRiME 2016/230th ECS Meeting
CountryUnited States
CityHonolulu
Period02/10/201607/10/2016
Internet address

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