 The study shows that a polarization electric field can regulate single-atom permutations and form periodic one-dimensional AU single-atom arrays on ferroelectric by 4T3O12 nano sheets, which greatly lowers the Gibbs free energy for CO2 conversion via AUO equals C equals OAU dual-site adsorption compared to that for AUO equals C equals O single-site adsorption on AU isolated single atoms. Additionally, the AU single-atom array suppressed the depolarization of by 4T3O12, so it maintains a stronger driving force for separation and transfer of photo-generated charges. The polarization electric field proves to be a general tactic for the synthesis of one-dimensional PT, AG, FE, CO and Ni single-atom arrays on the by 4T3O12 surface. This article was authored by Liz Hen Liu, Jing Seng Hu, Xiao Yu Ma, and others.