Surface topology of MXene flakes induces the selection of the sintering mechanism for supported Pt nanoparticles.

ABSTRACT: Sintering of metal nanocatalysts leading to particle growth and subsequent performance deactivation is a primary issue that hinders their practical applications. While metal-support interaction (MSI) is considered as the critical factor which influences the sintering behavior, the underlying microscopic mechanism and kinetics remain incompletely understood. Here, by using in situ scanning transmission electron microscopy (STEM) and theoretical analysis, we reveal the selection rule of the sintering mechanism for Pt nanoparticles on a two-dimensional (2D) MXene (Ti₃C₂T _x ) support, which relies on the surface topology of MXene flakes. It is demonstrated that the sintering of Pt nanoparticles proceeds via Ostwald ripening (OR) in the surf

SUBMITTER: Huang J 

PROVIDER: S-EPMC11333939 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature