Abstract
The surface chemistry of CeO2 is dictated by the well-defined facets, which exert great influence on the supported metal species and the catalytic performance. Here we report Pt1/CeO2 catalysts exhibiting specific structures of Pt–O coordination on different facets by using adequate preparation methods. The simple impregnation method results in Pt–O3 coordination on the predominantly exposed {111} facets, while the photo-deposition method achieves oriented atomic deposition for Pt–O4 coordination into the “nano-pocket” structure of {100} facets at the top. Compared to the impregnated Pt1/CeO2 catalyst showing normal redox properties and low-temperature activity for CO oxidation, the photo-deposited Pt1/CeO2 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.
H. Yan, H. Lei, X. Qin, J.-C. Liu, L. Cai, S. Hu, Z. Xiao, F. Peng, W.-W. Wang, Z. Jin, X. Yi, A. Zheng, C. Ma, C.-J. Jia, J. Zeng, Facet-dependent diversity of Pt–O coordination for Pt 1 /CeO 2 catalysts achieved by oriented atomic deposition, Angewandte Chemie International Edition, n/a (2024) e202411264. DOI: 10.1002/anie.202411264.
