催化学报 ›› 2017, Vol. 38 ›› Issue (11): 1888-1898.DOI: 10.1016/S1872-2067(17)62909-7

• 论文 • 上一篇    下一篇

沉积-沉淀-微波干燥法制备金属氧化物负载的金簇合物及其在CO氧化和硫化物氧化反应中的催化性能

竹岁绚子a,b, 石田玉青a,b, 大桥弘范c, 本间彻生d, 春田正毅a,b,e   

  1. a 首都大学东京大学院都市环境科学研究科金化学研究中心, 南大泽1-1, 八王子市, 东京192-0397, 日本;
    b 首都大学东京大学院都市环境科学研究科分子应用化学领域, 南大泽1-1, 八王子市, 东京192-0397, 日本;
    c 福岛大学共生系统理工学类, 金谷川1, 福岛市, 福岛960-1296, 日本;
    d 日本同步辐射研究所(Ja SRI), 光都1-1-1, 佐用, 兵库县679-5198, 日本;
    e 中国科学院大连化学物理研究所金催化研究中心, 辽宁大连 116023, 中国
  • 收稿日期:2017-07-29 修回日期:2017-09-06 出版日期:2017-11-18 发布日期:2017-11-24
  • 通讯作者: 春田正毅
  • 基金资助:

    JSPS KAKENHI (日本学术振兴会,JP26810098,JP16K17943).

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.

摘要:

采用沉积-沉淀法再辅以微波干燥和焙烧制备了金属氧化物负载的金簇合物和小的金纳米粒子.干燥方法影响了金颗粒尺寸.在炉干燥过程中Au (Ⅲ)因部分还原而致使Au聚集.相反,在微波干燥下,因快速和加热均一而使Au (Ⅲ)得以保持,在Al2O3上负载的Au颗粒尺寸小至1.4 nm.该法可用于具有几种不同微波吸收效率的金属氧化物载体,如MnO2,Al2O3和TiO2.这些催化剂在低温CO氧化和硫化物选择有氧氧化反应中的催化活性比常规方法制备的更高.

关键词: 金纳米粒子, 金簇合物, 微波, 一氧化碳氧化, 有氧氧化

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