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Strong Metal–Support Interactions between Pt Single Atoms and TiO 2
Author(s) -
Han Bing,
Guo Yalin,
Huang Yike,
Xi Wei,
Xu Jie,
Luo Jun,
Qi Haifeng,
Ren Yujing,
Liu Xiaoyan,
Qiao Botao,
Zhang Tao
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202003208
Subject(s) - catalysis , metal , adsorption , atom (system on chip) , materials science , chemical physics , nanotechnology , chemistry , organic chemistry , metallurgy , computer science , embedded system
Strong metal–support interaction (SMSI) has gained great attention in the field of heterogeneous catalysis. However, whether single‐atom catalysts can exhibit SMSI remains unknown. Here, we demonstrate that SMSI can occur on TiO 2 ‐supported Pt single atoms but at a much higher reduction temperature than that for Pt nanoparticles (NPs). Pt single atoms involved in SMSI are not covered by the TiO 2 support nor do they sink into its subsurface. The suppression of CO adsorption on Pt single atoms stems from coordination saturation (18‐electron rule) rather than the physical coverage of Pt atoms by the support. Based on the new finding it is revealed that single atoms are the true active sites in the hydrogenation of 3‐nitrostyrene, while Pt NPs barely contribute to the activity since the NP sites are selectively encapsulated. The findings in this work provide a new approach to study the active sites by tuning SMSI.