Unveiling the Mechanisms Ruling the Efficient Hydrogen Evolution Reaction with Mitrofanovite Pt3Te4

Danil W. Boukhvalov, Jia Cheng, Gianluca D'Olimpio, François C. Bocquet, Chia Nung Kuo, Anan Bari Sarkar, Barun Ghosh, Ivana Vobornik, Jun Fujii, Kuan Hsu, Li Min Wang, Ori Azulay, Gopi Nath Daptary, Doron Naveh, Chin Shan Lue, Mykhailo Vorokhta, Amit Agarwal, Lixue Zhang, Antonio Politano

Research output: Contribution to journalArticlepeer-review

Abstract

By means of electrocatalytic tests, surface-science techniques and density functional theory, we unveil the physicochemical mechanisms ruling the electrocatalytic activity of recently discovered mitrofanovite (Pt3Te4) mineral. Mitrofanovite represents a very promising electrocatalyst candidate for energy-related applications, with a reduction of costs by 47% compared to pure Pt and superior robustness to CO poisoning. We show that Pt3Te4 is a weak topological metal with the Z2 invariant, exhibiting electrical conductivity (∼4 × 106 S/m) comparable with pure Pt. In hydrogen evolution reaction (HER), the electrode based on bulk Pt3Te4 shows a very small overpotential of 46 mV at 10 mA cm-2 and a Tafel slope of 36-49 mV dec-1 associated with the Volmer-Heyrovsky mechanism. The outstanding ambient stability of Pt3Te4 also provides durability of the electrode and long-term stability of its efficient catalytic performances.

Original languageEnglish
Pages (from-to)8627-8636
Number of pages10
JournalJournal of Physical Chemistry Letters
DOIs
Publication statusAccepted/In press - 2021

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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