Facet‐Dependent Diversity of Pt−O Coordination for Pt<sub>1</sub>/CeO<sub>2</sub> Catalysts Achieved by Oriented Atomic Deposition
Han Yan, Haofan Lei, Xuetao Qin, Jincheng Liu, Jin‐Cheng Liu, Li‐Hua Cai, Sunpei Hu, Zizhen Xiao, Fenglin Peng, Wei‐Wei Wang, Zhao Jin, Xianfeng Yi, Anmin Zheng, Chao Ma, Chun‐Jiang Jia, Chun‐Jiang Jia, Jie Zeng
Abstract
Abstract The surface chemistry of CeO 2 is dictated by the well‐defined facets, which exert great influence on the supported metal species and the catalytic performance. Here we report Pt 1 /CeO 2 catalysts exhibiting specific structures of Pt−O coordination on different facets by using adequate preparation methods. The simple impregnation method results in Pt−O 3 coordination on the predominantly exposed {111} facets, while the photo‐deposition method achieves oriented atomic deposition for Pt−O 4 coordination into the “nano‐pocket” structure of {100} facets at the top. Compared to the impregnated Pt 1 /CeO 2 catalyst showing normal redox properties and low‐temperature activity for CO oxidation, the photo‐deposited Pt 1 /CeO 2 exhibits uncustomary strong metal‐support interaction and extraordinary high‐temperature stability. The preparation methods dictate the facet‐dependent diversity of Pt−O coordination, resulting in the further activity‐selectivity trade‐off. By applying specific preparation routes, our work provides an example of disentangling the effects of support facets and coordination environments for nano‐catalysts.