Design principles for oxygen-reduction activity on perovskite oxide catalysts for fuel cells and metal-air batteries

Jin Suntivich, Hubert A. Gasteiger, Naoaki Yabuuchi, Haruyuki Nakanishi, John B. Goodenough, Yang Shao-Horn

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

2386 Zitate (Scopus)

Abstract

The prohibitive cost and scarcity of the noble-metal catalysts needed for catalysing the oxygen reduction reaction (ORR) in fuel cells and metal-air batteries limit the commercialization of these clean-energy technologies. Identifying a catalyst design principle that links material properties to the catalytic activity can accelerate the search for highly active and abundant transition-metal-oxide catalysts to replace platinum. Here, we demonstrate that the ORR activity for oxide catalysts primarily correlates to σ*-orbital (eg) occupation and the extent of B-site transition-metal-oxygen covalency, which serves as a secondary activity descriptor. Our findings reflect the critical influences of the σ * orbital and metal-oxygen covalency on the competition between O2 2-/OH- displacement and OH- regeneration on surface transition-metal ions as the rate-limiting steps of the ORR, and thus highlight the importance of electronic structure in controlling oxide catalytic activity.

OriginalspracheEnglisch
Seiten (von - bis)546-550
Seitenumfang5
FachzeitschriftNature Chemistry
Jahrgang3
Ausgabenummer7
DOIs
PublikationsstatusVeröffentlicht - Mai 2011

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