高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (8): 1907.doi: 10.7503/cjcu20130260

• 物理化学 • 上一篇    下一篇

金属-有机骨架化合物为前驱体制备CuO/CeO2催化剂及在富氢条件下催化CO的氧化

徐力1, 陈超1, 王瑞1, 罗家还2, 刘云凌2, 张宁1   

  1. 1. 南昌大学化学系, 南昌 330031;
    2. 吉林大学无机合成与制备国家重点实验室, 长春 130012
  • 收稿日期:2013-03-19 出版日期:2013-08-10 发布日期:2013-07-19
  • 通讯作者: 陈超,男,博士,副教授,主要从事金属-有机骨架化合物的合成与催化研究.E-mail:chaochen@ncu.edu.cn;张宁,男,博士,教授,主要从事多相催化研究.E-mail:nzhang.ncu@163.com E-mail:chaochen@ncu.edu.cn;nzhang.ncu@163.com
  • 基金资助:

    国家自然科学基金(批准号: 21263014和21261017)和无机合成与制备化学国家重点实验室开放课题(批准号: 2013-41)资助.

Preparation of CuO/CeO2 Catalysts from Metal-organic Frameworks Precursor for Preferential CO Oxidation

XU Li1, CHEN Chao1, WANG Rui1, LUO Jia-Huan2, LIU Yun-Ling2, ZHANG Ning1   

  1. 1. Department of Chemistry, Nanchang University, Nanchang 330031, China;
    2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, Changchun 130012, China
  • Received:2013-03-19 Online:2013-08-10 Published:2013-07-19
  • Contact: Ning Zhang E-mail:chaochen@ncu.edu.cn;nzhang.ncu@163.com

摘要:

采用金属-有机骨架化合物(MOFs)Ce(1,3,5-BTC)(H2O)6为前驱体浸渍Cu2+离子后焙烧得到CuO/CeO2催化剂(B系列), 并应用于富氢气氛中CO优先氧化反应(CO-PROX). 通过与CuO/CeO2催化剂(A-600)对比发现, 不同的MOFs前驱体对催化剂铜活性物种的分散程度有很大影响. X射线衍射分析(XRD)、 透射电子显微镜(TEM)和氛气程序升温还原(H2-TPR)等表征均证明B系列催化剂表面铜有聚集现象, 由此增加了催化剂的抗H2O和CO2性能.

关键词: 金属-有机骨架化合物, 前驱体, CuO/CeO2催化剂, CO优先氧化反应

Abstract:

Employing metal-organic frameworks(MOFs)as precursors, a series of CuO/CeO2 catalysts was prepared and applied for CO-PROX(preferential oxidation of CO) in H2-rich stream. Compared with previously reported A-600 catalyst, we can conclude that different precursors lead different catalytic activity. The X-ray diffraction, temperature-programmed reduction in H2(H2-TPR), transmission electron microscope and X-ray photoelectron spectroscopy analysis characterization indicated the as-synthetic catalysts presented more bulk CuO species on the surface than that of the A-600 catalyst, which resulted in the negative catalytic activity for preferential CO oxidation. But this also prevented the deactivation of catalysts in H2O and CO2 steam, indicating that the catalysts were promising in the CO-PROX process for proton exchange membrane fuel cell(PEMFC) application.

Key words: Metal-organic frameworks(MOFs), Precursor, CuO/CeO2 catalyst, Preferential oxidation of CO(CO-PROX)

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