催化作用
吸附
金属
材料科学
化学
Atom(片上系统)
纳米技术
化学物理
物理化学
有机化学
冶金
计算机科学
嵌入式系统
作者
Bing Han,Yalin Guo,Yike Huang,Wei Xi,Jie Xu,Jun Luo,Haifeng Qi,Yujing Ren,Xiaoyan Liu,Botao Qiao,Tao Zhang
标识
DOI:10.1002/anie.202003208
摘要
Abstract 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.
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