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Single‐Site Au I Catalyst for Silane Oxidation with Water
Author(s) -
Chen Zheng,
Zhang Qi,
Chen Wenxing,
Dong Juncai,
Yao Hurong,
Zhang Xiangbo,
Tong Xuanjue,
Wang Dingsheng,
Peng Qing,
Chen Chen,
He Wei,
Li Yadong
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201704720
Subject(s) - catalysis , silanes , silane , materials science , active site , homogeneous , dispersion (optics) , nitrogen , absorption (acoustics) , photochemistry , carbon fibers , inorganic chemistry , chemistry , organic chemistry , physics , composite number , optics , composite material , thermodynamics
Single‐site Au anchored on mpg‐C 3 N 4 (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‐C 3 N 4 . The coordination of the catalytically active Au I 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 Au I highly active, which is completely different than homogeneous Au I species.