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Ultrafine Pt cluster and RuO2 heterojunction anode catalysts designed for ultra-low Pt-loading anion exchange membrane fuel cells

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Abstract

Development of high-performance hydrogen oxidation catalysts with ultralow precious metal loading is critical to the development of next-generation anion-exchange membrane fuel cells. Here, a novel Ru-rich Pt–RuO2 heterojunction catalyst was synthesized via a solvothermal process followed by thermal treatment. The Pt–RuO2 catalyst has ultrafine Pt clusters and a heterojunction interface between Pt and RuO2, which facilitates high hydrogen oxidation activity while minimizing adverse adsorption of the phenyl group in the polymer electrolyte. The performance of a membrane electrode assembly employing the Pt–RuO2/C reached a peak power density of 0.77 W cm−2 with an anode Pt loading of 25 μgPt cm−2, achieving a specific power of 31 W mgPt−1 under H2/O2 conditions. The combined analysis of electrode performance and cost indicates that Pt–RuO2/C is one of the most promising catalysts that is approaching the U.S. DOE 2020 performance and cost targets for transportation applications.

Graphical abstract: Ultrafine Pt cluster and RuO2 heterojunction anode catalysts designed for ultra-low Pt-loading anion exchange membrane fuel cells

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Publication details

The article was received on 09 Aug 2019, accepted on 04 Oct 2019 and first published on 04 Oct 2019


Article type: Communication
DOI: 10.1039/C9NH00533A
Nanoscale Horiz., 2019, Advance Article

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    Ultrafine Pt cluster and RuO2 heterojunction anode catalysts designed for ultra-low Pt-loading anion exchange membrane fuel cells

    R. Wang, D. Li, S. Maurya, Y. S. Kim, Y. Wu, Y. Liu, D. Strmcnik, N. M. Markovic and V. R. Stamenkovic, Nanoscale Horiz., 2019, Advance Article , DOI: 10.1039/C9NH00533A

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