Chinese Journal of Catalysis ›› 2017, Vol. 38 ›› Issue (11): 1888-1898.DOI: 10.1016/S1872-2067(17)62909-7

• Articles • Previous Articles     Next Articles

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

Ayako Taketoshia,b, Tamao Ishidaa,b, Hironori Ohashic, Tetsuo Honmad, Masatake Harutaa,b,e   

  1. 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:2017-07-29 Revised:2017-09-06 Online:2017-11-18 Published:2017-11-24
  • Contact: 10.1016/S1872-2067(17)62909-7
  • Supported by:

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

Abstract:

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.

Key words: Gold nanoparticles, Gold clusters, Microwave, CO oxidation, Aerobic oxidation