▎ 摘　　要

The geometry, electronic structure, and catalytic properties for CO oxidation of Pt atom supported on pri-graphene (PG), Haeckelite (H), and Stone-Wales-defect-graphene are investigated by density functional theory (DFT) calculations. In contrast to a Pt atom on PG, defective graphene, especially the Haeckelite, strongly stabilises the Pt atom and makes it more positive and thus the CO poisoning. At the same time the catalytic activities are as high as the pristine one. Langmuir-Hinshelwood mechanisms are favoured as the starting state and are followed by the Eley-Rideal reaction. The results indicate the benefit of Haeckelite as a substrate for the Pt atom and validate the reactivity of catalysts on the atomic scale with low cost and high activity.