Citation: Ayako Taketoshi, Tamao Ishida, Hironori Ohashi, Tetsuo Honma, Masatake Haruta. Preparation of gold clusters on metal oxides by deposition-precipitation with microwave drying and their catalytic performance for CO and sulfide oxidation[J]. Chinese Journal of Catalysis, ;2017, 38(11): 1888-1898. doi: 10.1016/S1872-2067(17)62909-7 shu

Preparation of gold clusters on metal oxides by deposition-precipitation with microwave drying and their catalytic performance for CO and sulfide oxidation

a Research Center for Gold Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji, Tokyo 192-0397, Japan;
b Department of Applied Chemistry, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minami-osawa, Hachioji, Tokyo 192-0397, Japan;
c Faculty of Symbiotic Systems Science, Fukushima University, 1 Kanayagawa, Fukushima, Fukushima 960-1296, Japan;
d Japan Synchrotron Radiation Research Institute(JASRI), 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan;
e Gold Catalysis Research Center, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China

Received Date: 29 July 2017
Revised Date: 6 September 2017

Fund Project: This work was supported by JSPS KAKENHI Grant Numbers JP26810098 and JP16K17943.

Gold clusters and small nanoparticles supported on metal oxides could be prepared by deposi-tion-precipitation followed by microwave irradiation as a drying method and then calcination. The drying method influenced the size of the Au particles. Au(Ⅲ) was partly reduced during conven-tional oven drying, resulting in Au aggregates. In contrast, Au(Ⅲ) was preserved during microwave drying owing to rapid and uniform heating, and the Au diameter was minimized to 1.4 nm on Al₂O₃. This method can be applied to several metal oxide supports having different microwave absorption efficiencies, such as MnO₂, Al₂O₃, and TiO₂. These catalysts exhibited higher catalytic activities for CO oxidation at low temperature and for selective aerobic oxidation of sulfide than those prepared by conventional methods.
- Gold nanoparticles,
- Gold clusters,
- Microwave,
- CO oxidation,
- Aerobic oxidation
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