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    谢晴

    • 高级工程师    
    • 主要任职:无
    • 性别:女
    • 毕业院校:大连理工大学
    • 学位:博士
    • 在职信息:在职
    • 所在单位:环境学院
    • 学科:环境工程
    • 办公地点:环境楼A315
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    Fabrication of active Cu-Zn nanoalloys on H-ZSM5 zeolite for enhanced dimethyl ether synthesis via syngas

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    论文类型:期刊论文

    第一作者:Sun, Jian

    通讯作者:Tsubaki, N (reprint author), Toyama Univ, Sch Engn, Dept Appl Chem, Gofuku 3190, Toyama 9308555, Japan.

    合写作者:Yang, Guohui,Ma, Qingxiang,Ooki, Issei,Taguchi, Akira,Abe, Takayuki,Xie, Qing,Yoneyama, Yoshiharu,Tsubaki, Noritatsu

    发表时间:2014-06-21

    发表刊物:JOURNAL OF MATERIALS CHEMISTRY A

    收录刊物:SCIE、EI、Scopus

    卷号:2

    期号:23

    页面范围:8637-8643

    ISSN号:2050-7488

    摘要:One-step conversion of CO and H-2 to dimethyl ether (DME) is still challenging to date. This work describes a promising bifunctional Cu/ZnO/H-ZSM5 catalyst prepared by a novel bimetallic sputtering method for such conversions. The sputtered catalyst consisted of well-dispersed Cu-ZnO nanoparticles of about 5 nm, which were physically anchored on an acidic zeolite support. The weak interaction between the deposited metal and zeolite clearly lowered the reduction temperature by 50 degrees C. After H-2 reduction, a unique Cu-Zn nanoalloy layer was observed on the surface of the Cu-ZnO nanoparticles, reducing the activation energy of CO adsorption. The surface alloy layer and inner Cu-ZnO sites play a cooperative catalytic role in improving the CO conversion and promoting DME selectivity. Compared to conventional impregnated catalysts, the CO conversion was enhanced by almost four times and the DME selectivity was promoted to as high as 92.1%. The proposed concept is beneficial for developing highly-active catalysts with bimetallic components supported on a functional support.