Development of enhanced corrosion resistant carbon supports for Pt/C catalysts for the oxygen electroreduction reaction

V. A. Golovin, E. N. Gribov, A. G. Okunev, P. A. Simonov, I. N. Voropaev, A. N. Kuznetsov

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

Abstract

A sharp increase in the cathode potential (up to 1.4 V. vs. RHE) due to the simultaneous presence of oxygen (air) and hydrogen in the anode side is the main degradation cause of Pt/C catalysts for polymer electrolyte fuel cells (PEMFC) using as a power source for cars. This potential is much higher than the carbon oxidation potential, so the corrosion resistance of a carbon support is an important parameters of the PEMFC effective operation. In this paper, the stability of commercial carbon supports was improved by modifying the surface under different conditions. A series of the 50 % Pt/C catalysts were synthesized and their stabilities (electrochemical surface area of Pt) were investigated using "start-stop cycling" in an electrochemical cell at 1.0-1.5 vs. RHE potentials with a sweep rate of 0.5 V/s for 60,000 cycles. Commercial 40%Pt/Vulcan XC- 72 and catalysts were selected for a comparison. It is shown that the support carbonization with propane-butane mixture at 750°C increases, while the activation in air with subsequent treatment at 800°C lowers the corrosion resistance of Pt/C catalysts.

Original languageEnglish
Title of host publication20th World Hydrogen Energy Conference, WHEC 2014
PublisherCommittee of WHEC2014
Pages683-688
Number of pages6
Volume1
ISBN (Electronic)9780000000002
Publication statusPublished - 2014
Event20th World Hydrogen Energy Conference, WHEC 2014 - Gwangju, Korea, Republic of
Duration: 15 Jun 201420 Jun 2014

Conference

Conference20th World Hydrogen Energy Conference, WHEC 2014
CountryKorea, Republic of
CityGwangju
Period15.06.201420.06.2014

Keywords

  • Carbon supports
  • Fuel cells
  • Platinum

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