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Catalysts 2018, 8(6), 230; https://doi.org/10.3390/catal8060230

MgO-Templated Mesoporous Carbon as a Catalyst Support for Polymer Electrolyte Fuel Cells

Toyota Central Research & Development Laboratories, Inc., Nagakute 4801192, Japan
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Received: 5 April 2018 / Revised: 28 May 2018 / Accepted: 29 May 2018 / Published: 1 June 2018
(This article belongs to the Special Issue Catalysts for Polymer Membrane Fuel Cells)
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Abstract

An MgO-templated mesoporous carbon, CNovel®, was employed as a catalyst support for the cathode of polymer electrolyte fuel cells (PEFCs) after modifying its dimensional, crystalline, surface and porous structures and the electrochemical oxygen reduction reaction (ORR) activities were examined by the thin-film rotating disk electrode (RDE) method and as well as the membrane electrode assembly (MEA) method. Although the catalytic activity of Pt on CNovel® was comparable with that on a non-porous carbon, Vulcan®, in the RDE configuration without Nafion®, Pt/CNovel showed a considerably higher activity than Pt/Vulcan in the MEA condition with Nafion®. The mechanism inducing this difference was discussed from the results of electrochemical surface area and sulfonic coverage measurements which suggested that Pt particles on inside pores of CNovel® are not covered with Nafion® ionomer while protons can still reach those Pt particles through water network. The MEA performance in the middle and high current-density regions was drastically improved by heat-treatment in air, which modified the pore structure to through-pored ones. View Full-Text
Keywords: polymer electrolyte fuel cells; catalyst layer; mesoporous carbon; catalyst support; ionomer polymer electrolyte fuel cells; catalyst layer; mesoporous carbon; catalyst support; ionomer
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Kamitaka, Y.; Takeshita, T.; Morimoto, Y. MgO-Templated Mesoporous Carbon as a Catalyst Support for Polymer Electrolyte Fuel Cells. Catalysts 2018, 8, 230.

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