Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 41, Pages 18003-18009Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202007462
Keywords
heterogeneous catalysis; metal oxides; photooxidation; reaction intermediates; surface-enhanced Raman spectroscopy
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Funding
- National Natural Science Foundation of China [21861132016, 21775074]
- Fundamental Research Funds for the Central Universities-Nankai University [000082]
- 111 project [B12015]
- National Key RD Program [2017YFA0206702, 2016YFB0901502]
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This work reports on an assembling-calcining method for preparing gold-metal oxide core-satellite nanostructures, which enable surface-enhanced Raman spectroscopic detection of chemical reactions on metal oxide nanoparticles. By using the nanostructure, we study the photooxidation of Si-H catalyzed by CuO nanoparticles. As evidenced by the in situ spectroscopic results, oxygen vacancies of CuO are found to be very active sites for oxygen activation, and hydroxide radicals (*OH) adsorbed at the catalytic sites are likely to be the reactive intermediates that trigger the conversion from silanes into the corresponding silanols. According to our finding, oxygen vacancy-rich CuO catalysts are confirmed to be of both high activity and selectivity in photooxidation of various silanes.
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