Electrocatalytic measurement methodology of oxide catalysts using a thin-film rotating disk electrode

Jin Suntivich, Hubert A. Gasteiger, Naoaki Yabuuchi, Yang Shao-Horn

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

354 Zitate (Scopus)

Abstract

Transition-metal oxides can exhibit high electrocatalytic activity for reactions such as the oxygen reduction reaction (ORR) in alkaline media. It is often difficult to measure and compare the activities of oxide catalysts on either per mass or per surface area basis, because of the poorly defined oxygen transport to and within porous oxide electrodes of several tens of micrometers thickness. In this study, a methodology was developed to compare the ORR activities of submicrometer-sized transition-metal oxides. Thin films of LaNiO3, LaCu0.5Mn0.5O3, and La 0.75 Ca0.25 FeO3 oxide particles were bonded to glassy carbon via an ion-exchanged Nafion binder, and their mass and specific ORR activities were extracted from rotating disk electrode measurements. We found that the specific activity of LaNiO3 was much higher than that of La0.75 Ca0.25 FeO3 and LaCu 0.5Mn0.5O3. The projection of LaNiO3 in the actual fuel cell cathode was presented, which was shown to be competitive with current platinum-based cathodes.

OriginalspracheEnglisch
Seiten (von - bis)B1263-B1268
FachzeitschriftJournal of the Electrochemical Society
Jahrgang157
Ausgabenummer8
DOIs
PublikationsstatusVeröffentlicht - 2010

Fingerprint

Untersuchen Sie die Forschungsthemen von „Electrocatalytic measurement methodology of oxide catalysts using a thin-film rotating disk electrode“. Zusammen bilden sie einen einzigartigen Fingerprint.

Dieses zitieren