Durable tungsten carbide support for Pt-based fuel cells cathodes

Oran Lori; Shmuel Gonen; Omree Kapon; Lior Elbaz

doi:10.1021/acsami.0c20089

Durable tungsten carbide support for Pt-based fuel cells cathodes

Oran Lori, Shmuel Gonen, Omree Kapon, Lior Elbaz

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

In an effort to develop durable, corrosion-resistant catalyst support materials for polymer electrolyte fuel cells, modified polymer-assisted deposition method was used to synthesize tungsten carbide (WC, WC₁−_x), which was later used as a support material for Pt-based oxygen reduction reaction catalyst, as an alternative for the corrosion-susceptible, carbon supports. The Pt-deposited tungsten carbide’s corrosion-resistance, oxygen reduction reaction electrocatalysis, and durability were studied and compared to that of Pt/C. Bulk free carbon was found to be absent from the ceramic matrix which had particle size in the range of 2−25 nm. Tungsten carbide support appears to enhance the oxygen reduction activity on Pt, showing an increase in mass activity (nearly 2-fold at 0.85 V vs RHE) and specific activity (more than 7 times higher), alongside decrease in overpotential, in comparison to Pt/C. A significant increase in durability was also observed with the tungsten carbide-based system.

Original language	English
Pages (from-to)	8315-8323
Number of pages	9
Journal	ACS Applied Materials and Interfaces
Volume	13
Issue number	7
DOIs	https://doi.org/10.1021/acsami.0c20089
State	Published - 24 Feb 2021

Bibliographical note

Publisher Copyright:
© 2021 American Chemical Society.

Funding

We thank the Israel Ministry of Science, the Israeli Ministry of Energy, and the Israeli Science foundation (ISF) for funding this research. In addition, the we express gratitude to Dr. Ilana Perelshtein for assisting with acquiring the TEM and STEM images and Ms. Hilah Clara Honig for assisting with the schematic illustrations and graphical abstract. This work was done in the framework of the Israeli Fuel Cells Consortium (part of Israel National Center for Electrochemical Propulsion), supported by the Fuel Choices and Smart Mobility Initiative at the Israeli Prime Minister’s Office.

Funders	Funder number
Israel Ministry of Science
Israeli Fuel Cells Consortium
Israeli Prime Minister’s Office
Israel Science Foundation
Israel National Research Center for Electrochemical Propulsion
Ministry of Energy, Israel

Keywords

Ceramic materials
Corrosion-resistance
Fuel-cells
ORR
Tungsten carbide

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10.1021/acsami.0c20089

Cite this

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Durable tungsten carbide support for Pt-based fuel cells cathodes

Abstract

Bibliographical note

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Keywords

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