▎ 摘　　要

We investigated the erosion of graphene due to hydrogen atom adsorption using a molecular dynamics simulation with the modified Brenner's reactive empirical bond order potential. We found that a C-C bond that has adsorbed two hydrogen atoms on the opposite side of the graphene surface (para-overhang C-C bond) is broken first; the para-overhang C-C bond is considered to trigger the erosion. With time, the type of C-C bond that breaks changes from the para-overhang C-C bond to a C-C bond that has adsorbed one hydrogen atom, the mono-overhang C-C bond. In contrast, the C-C bond that has adsorbed two hydrogen atoms on the same side of the graphene surface (ortho-overhang) and the C-C bond without hydrogen atoms (flat C-C bond) are stable during the erosion process.