Facet‐Dependent Diversity of Pt−O Coordination for Pt1/CeO2 Catalysts Achieved by Oriented Atomic Deposition

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.