单原子铜修饰的铂纳米催化剂制备及性能研究进展

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摘要本文综述了单原子铜修饰的铂纳米催化剂的制备、表征及其在氯代硝基苯、环氧氯丙烷和苯乙炔的选择性加氢反应中的性能研究进展。通过铜单原子对铂纳米粒子修饰方式不同，可分别获得具有电子效应和几何效应的铂-铜催化剂。球差透射电镜、同步辐射和原位XPS表征揭示了铂-铜催化剂的微观结构和电子转移情况。催化性能研究结果表明电子效应可有效抑制氯代硝基苯和环氧氯丙烷催化加氢过程中的脱氯副反应，而几何效应可有效地将苯乙炔选择性还原为苯乙烯。原位红外和理论计算手段用于揭示单原子铜改变铂纳米粒子催化性能的机制。研究结果表明，单原子铜可调节反应分子在催化剂表面的吸附行为和能垒，为进一步探索催化科学理论奠定了基础。

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	梁明会

关键词 ：铜单原子, 铂纳米粒子, 电子效应, 几何效应, 催化

Abstract：This article reviews the preparation, charaterizations and catalytic performance in the selective hydrogenation of para-chloronitrobenzene, epichlorohydrin, and phenylacetylene of the Pt nanocatalysts decorated with Cu single atoms. The Pt-Cu catalysts with electronic effect and geometric effect separately can be obtained by decorating the Pt nanoparticles with Cu single atoms in different ways. The structure and the electronic transfer between Pt and Cu of the Pt-Cu catalysts are revealed by spherical aberration transmission electron microscope (Cs-TEM), synchrotron radiation, and ex-situ XPS charaterizations. The experimental results reveal that the electronic effect can effectively inhibit the dechlorination reactions in the selective hydrogenation of para-chloronitrobenzene and epichlorohydrin, and that geometric effect can help the production of styrene from phenylacetylene. In-situ FT-IR and DFT theoretical calculations are used to reveal the catalytic mechanism that Cu single atoms modify the catalytic performance of Pt nanoparticles. The results reveal that Cu single atoms alter the adsorption behaviors of the reacting molecules and reaction barriers over Pt nanoparticles, which is a solid basis for exploring the catalytic theory.

Key words： Cu single atoms Pt nanoparticles electronic effect geometric effect catalysis

收稿日期: 2024-03-08 出版日期: 2024-06-13

基金资助:国家重点研发计划

通讯作者: 梁明会 E-mail: liangmh@nanoctr.cn

引用本文:

梁明会. 单原子铜修饰的铂纳米催化剂制备及性能研究进展[J]. , 2024, 31(2): 0-0.
Ming-Hui Liang. Progress in the preparation and performance of Pt nanocatalysts decorated with Cu single atoms. , 2024, 31(2): 0-0.

链接本文:

http://edit.chinamet.cn/Jweb_jsgncl/CN/ 或 http://edit.chinamet.cn/Jweb_jsgncl/CN/Y2024/V31/I2/0

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