Zhang Kaifu, Yang Ling, Hu Yanfang, Fan Chenghao, Zhao Yaran, Bai Lu, Li Yonglong, Shi Faxing, Liu Jun, Xie Wei
Key Lab of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, Weijin Rd. 94, Tianjin, 300071, China.
Angew Chem Int Ed Engl. 2020 Oct 5;59(41):18003-18009. doi: 10.1002/anie.202007462. Epub 2020 Aug 18.
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.
本工作报道了一种制备金-金属氧化物核-卫星纳米结构的组装-煅烧方法，该方法能够对金属氧化物纳米颗粒上的化学反应进行表面增强拉曼光谱检测。通过使用这种纳米结构，我们研究了由氧化铜纳米颗粒催化的硅氢光氧化反应。原位光谱结果表明，氧化铜的氧空位是氧活化的非常活跃的位点，吸附在催化位点的羟基自由基（*OH）可能是触发硅烷转化为相应硅醇的反应中间体。根据我们的发现，富含氧空位的氧化铜催化剂在各种硅烷的光氧化反应中被证实具有高活性和选择性。
