Scalable Defect Engineering of Pt₃Te₄ Nanosheets Activates an Electro-Switchable and Termination-Dependent PtO₂ Skin for Low-Overpotential Hydrogen Evolution.

ABSTRACT: Topological materials are promising electrocatalysts for the hydrogen evolution reaction (HER) because of their protected electronic states and exceptional carrier mobility. Among them, the topological metal Pt₃Te₄ (mitrofanovite) exhibits low Tafel slopes in the nanocrystals. Realizing this potential in scalable catalyst systems requires nanoscale texturing coupled with precise control of the surface chemistry under operating conditions. Herein, we demonstrate that hydrogen peroxide (H₂O₂)-assisted liquid-phase exfoliation (LPE) of bulk Pt₃Te₄ yields nanoporous nanosheets that retain their metallic character and are chemically preconditioned to develop a bias-controlled PtO₂ skin that governs the catalytic activi

SUBMITTER: Dadiani T 

PROVIDER: S-EPMC12903106 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature