▎ 摘　　要

Graphene can be widely utilized as a substrate to support various transition metal (TM) nanoclusters or nanoparticles for surfaced-supported catalysis, such as electrocatalysis or photovoltaics. The subtle interactions between TM and graphene carbon atoms are expected to be crucial in TM-graphene nanocomposites to affect their growth morphologies and final functionalities. Here, the morphology evolution and catalytic ability of five ultrafine TM (Zn, Cu, Fe, Ni, and Ru) clusters with 48 atoms on graphene etching are investigated by using ab initio molecular dynamics (AIMD) simulations. It is found that three factors, i.e., TM cluster type, operation temperature, and graphene edge type, play important roles in the catalytic behaviors of TM clusters for heat-induced graphene etching. The results are helpful in locating the catalytic performance of TM clusters in graphene cutting and ensuring stability of TM-graphene nanocomposites in device applications.