Mo₂C Ceramic Electrode Embedded with PtMo₃ Nanograins for Hydrogen Evolution Reaction at High Current Density.

Authors

Anding Huang, Jiahao Li, Chuntian Tan, Sishi Huang, Haisen Huang, Yang Yang, Luyuan Hao, Feihong Wang, Xin Xu, Simeon Agathopoulos

Published in

ACS applied materials & interfaces. Aug 29, 2025. Epub Aug 29, 2025.

Abstract

The scarcity and high price seriously hinder the large-scale industrial application of Pt as the preferred catalyst for the hydrogen evolution reaction (HER). A PtMo₃@Mo₂C catalytic electrode was designed based on a porous Mo₂C ceramic membrane with finger-like holes, where PtMo₃ nanograins were uniformly embedded in the surface of the Mo₂C grains by electrodeposition and thermal reduction. The loading of Pt is as small as 7.8 × 10^-4 g m^-2. The electrode exhibits extraordinary HER catalytic performance with an overpotential of 189 mV to drive a current density of 2.0 A cm^-2 (acidic) and 212 mV to drive a current density of 1.0 A cm^-2 (alkaline). Under ultrahigh current densities, the electrode can operate stably for over 152 h, demonstrating high structural stability and catalytic stability. Theoretical calculations indicate that the formation of Mo₂C(100)/PtMo₃(200) can further optimize the electronic structure of the interface Pt atoms, thereby enhancing the HER performance.

PMID:
40878646
Bibliographic data and abstract were imported from PubMed on 29 Aug 2025.

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