Single‐Site AuI Catalyst for Silane Oxidation with Water |
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| Authors: | Zheng Chen Qi Zhang Wenxing Chen Juncai Dong Hurong Yao Xiangbo Zhang Xuanjue Tong Dingsheng Wang Qing Peng Chen Chen Wei He Yadong Li |
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| Affiliation: | 1. Department of Chemistry, Tsinghua University, Beijing, China;2. School of Pharmaceutical Sciences, Tsinghua University, Beijing, China;3. Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China;4. CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China |
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| Abstract: | Single‐site Au anchored on mpg‐C3N4 (519 ppm Au loading) is developed as a highly active, selective, and stable catalyst for the oxidation of silanes with water with a turnover frequency as high as 50 200 h?1, far exceeding most known catalysts based on total gold content. Other hydrosilanes bearing unsaturated functional groups also lead to corresponding silanols under mild reaction conditions without formation of any side products in good or excellent yields. The spherical aberration correction electron microscopy and extended X‐ray absorption fine structure measurements both confirm the atomic dispersion of Au atoms stabilized by mpg‐C3N4. The coordination of the catalytically active AuI by three nitrogen or carbon atoms in the tri‐s‐triazine repeating units not only prevents the Au atoms from aggregation, but also renders the surface AuI highly active, which is completely different than homogeneous AuI species. |
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| Keywords: | carbon nitrides coordination environments gold mesoporous single‐site catalysis |
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