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Assessing the Potential of Co-Pt Bronze for Electrocatalysis in Acidic Media

1
Toyota Central R&D Labs., Inc., Aichi 480-1192, Japan
2
National Institute of Advanced Industrial Science and Technology, Osaka 563-8577, Japan
*
Author to whom correspondence should be addressed.
Catalysts 2018, 8(7), 258; https://doi.org/10.3390/catal8070258
Received: 6 June 2018 / Revised: 20 June 2018 / Accepted: 21 June 2018 / Published: 25 June 2018
(This article belongs to the Special Issue Catalysts for Polymer Membrane Fuel Cells)
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Abstract

An electron-conducting mixed oxide, Co-Pt bronze was synthesized and examined as a candidate for a highly durable electrocatalyst for both the polymer electrolyte fuel cells and electrolyzers. The motivation of this study comes from the fact that this material has not been studied as an electrocatalyst in acidic media, although past studies showed a high electronic conductivity and a high corrosion resistance. Co-Pt bronze without metallic Pt was obtained by solid-state synthesis and hot aqua regia rinsing. The OER activity was found to be among the highest as a material without Ir and Ru in acidic media, and it showed extremely high electrochemical stability in the OER potential range. Its oxygen reduction reaction (ORR) was obtained after potential cycles down to the hydrogen region, which formed a thin Pt metallic layer over the oxide. While its specific activity was not more than that of pure platinum nanoparticles, its durability against the potential cycles was much higher. View Full-Text
Keywords: polymer electrolyte fuel cells; oxygen reduction reaction catalyst; polymer electrolyte water electrolysis; oxygen evolution reaction catalysts; mixed oxide polymer electrolyte fuel cells; oxygen reduction reaction catalyst; polymer electrolyte water electrolysis; oxygen evolution reaction catalysts; mixed oxide
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Kamitaka, Y.; Taguchi, N.; Morimoto, Y. Assessing the Potential of Co-Pt Bronze for Electrocatalysis in Acidic Media. Catalysts 2018, 8, 258.

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