Ordered clustering of single atomic Te vacancies in atomically thin PtTe₂ promotes hydrogen evolution catalysis.

ABSTRACT: Exposing and stabilizing undercoordinated platinum (Pt) sites and therefore optimizing their adsorption to reactive intermediates offers a desirable strategy to develop highly efficient Pt-based electrocatalysts. However, preparation of atomically controllable Pt-based model catalysts to understand the correlation between electronic structure, adsorption energy, and catalytic properties of atomic Pt sites is still challenging. Herein we report the atomically thin two-dimensional PtTe₂ nanosheets with well-dispersed single atomic Te vacancies (Te-SAVs) and atomically well-defined undercoordinated Pt sites as a model electrocatalyst. A controlled thermal treatment drives the migration of the Te-SAVs to form thermodynamically stabilized, ordered Te-SAV clusters, which decreases bot

SUBMITTER: Li X 

PROVIDER: S-EPMC8060321 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature