Electrocatalytic Measurement Methodology of Oxide Catalysts Using a Thin-Film Rotating Disk Electrode
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Shao-Horn_Electrocatalytic measurement.pdf
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Author(s)
Suntivich, Jin
Gasteiger, Hubert A.
Yabuuchi, Naoaki
Shao-Horn, Yang
Date Issued
July 2010
Journal
Journal of The Electrochemical Society
Publisher
The Electrochemical Society
Citation
Suntivich, Jin et al. “Electrocatalytic Measurement Methodology of Oxide Catalysts Using a Thin-Film Rotating Disk Electrode.” Journal of The Electrochemical Society 157.8 (2010): B1263. © 2010 ECS - The Electrochemical Society
Version
Final published version
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 LaNiO[subscript 3], LaCu[subscript 0.5]Mn[subscript 0.5]O[subscript 3], and La[subscript 0.75]Ca[subscript 0.25]FeO[subscript 3] 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 LaNiO[subscript 3] was much higher than that of La[subscript 0.75]Ca[subscript 0.25]FeO[subscript 3] and LaCu[subscript 0.5]Mn[subscript 0.5]O[subscript 3]. The projection of LaNiO[subscript 3] in the actual fuel cell cathode was presented, which was shown to be competitive with current platinum-based cathodes.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Massachusetts Institute of Technology. Department of Mechanical Engineering
Massachusetts Institute of Technology. Electrochemical Energy Laboratory
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DOI of Published Version
https://doi.org/10.1149/1.3456630
