化工进展 ›› 2020, Vol. 39 ›› Issue (7): 2639-2647.DOI: 10.16085/j.issn.1000-6613.2019-1546

• 工业催化 • 上一篇    下一篇

Cu基CO2合成甲醇催化剂载体的研究进展

侯瑞君(), 邱瑞, 孙克宁()   

  1. 北京理工大学化学与化工学院,化学电源与绿色催化北京市重点实验室,北京 100081
  • 出版日期:2020-07-05 发布日期:2020-07-10
  • 通讯作者: 孙克宁
  • 作者简介:侯瑞君(1988—),博士,硕士生导师,研究方向为多相催化。E-mail:hourj@bit.edu.cn
  • 基金资助:
    国家自然科学基金(21606017)

Progress in the Cu-based catalyst supports for methanol synthesis from CO2

Ruijun HOU(), Rui QIU, Kening SUN()   

  1. Beijing Key Laboratory for Chemical Power Source and Green Catalysis, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
  • Online:2020-07-05 Published:2020-07-10
  • Contact: Kening SUN

摘要:

氧化物载体与Cu之间的相互作用、CO2的活化位点、表面反应机理、表面反应路径直接影响CO2催化加氢的产物分布。因此,探明不同金属–载体的相互作用和界面微观结构至关重要。本文综述了CO2催化加氢合成甲醇Cu基催化剂载体的研究现状,重点综述了ZnO、ZrO2、CeO2、TiO2这4种具有氧空位的载体,并简单总结了SiO2、Al2O3、Zn-Zr、Ce-Zr、钙钛矿等其他氧化物载体。Cu与ZnO之间的强金属相互作用(SMSI)所形成的Cu/ZnOx是主要的活性位点,对其微观结构与反应机理研究得较为充分;对Cu/ZrO2的研究主要集中在ZrO2晶相的影响,不同的研究者所获得的结论尚存在争议;对Cu/CeO2的机理研究停留在反向CeO2/Cu(111)模型表面,负载型催化剂上不同晶面的CeO2与Cu的相互作用强度不同,并影响反应性能;Cu/TiO2中TiO2的影响因素较多,如晶型、晶面等,目前对其研究尚不全面。最后,本文分析并展望了CO2加氢制甲醇催化剂载体的研究方向,未来将采用与实际催化剂一致的正向模型表面进行基础研究,并基于原位表征手段对反应过程中催化剂的结构变化进行探索,最终设计高效、低成本的多元复合物载体的Cu基催化剂。

关键词: 二氧化碳, 催化, 加氢, 甲醇, 金属-载体相互作用, Cu基催化剂

Abstract:

In the hydrogenation of CO2, the product distribution is mainly affected by the interaction between oxide supports and Cu, the active sites for CO2 activation, surface reaction mechanism, and surface reaction pathway, where the microstructure of the metal-support interface is important. This paper summarized the progress in the Cu-based catalyst supports for methanol synthesis from CO2, and the emphasis was placed on ZnO, ZrO2, CeO2, and TiO2 which possess oxide vacancies during the reaction. Then the supports effects of SiO2, Al2O3, Zn-Zr, Ce-Zr, and perovskite were briefly introduced. The Cu/ZnOx interface formed by strong metal-support interaction(SMSI) is the main active site for CO2 hydrogenation, and its microstructure and reaction mechanism have been extensively investigated. The researches on Cu/ZrO2 have been focused on the crystalline phase of ZrO2, but there remains debate in the conclusions. The reaction mechanism study of Cu/CeO2 is still limited to the reverse CeO2/Cu(111) model and the morphology of CeO2 affects the interaction between Cu and the supports, and hence affects the product distribution. There are a variety of factors such as crystalline phase and facet that affect the catalytic properties of Cu/TiO2 but the current research is not complete. Finally, this paper outlined the research should be conducted in future, i.e. The obverse model surface which are consistent with the real catalyst surface is used for fundamental research and the structural changes of the catalysts during reaction are explored via in-situ characterization so that the efficient and low-cost Cu based catalyst supported on multicomponent oxide can be ultimately designed.

Key words: carbon dioxide, catalysis, hydrogenation, methanol, metal-support interaction, Cu-based catalyst

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