Chinese Journal of Catalysis ›› 2023, Vol. 48: 195-204.DOI: 10.1016/S1872-2067(23)64424-9

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Enhancing the chemoselective hydrogenation of nitroarenes: Designing a novel surface-strained carbon-based Pt nanocatalyst

Fengwei Zhanga,*,1(), Hefang Guoa,1, Mengmeng Liua, Yang Zhaod, Feng Hongb, Jingjing Lia, Zhengping Dongc,*(), Botao Qiaob,*()   

  1. aInstitute of Crystalline Materials, Institute of Molecular Science, Shanxi University, Taiyuan 030006, Shanxi, China
    bCAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
    cCollege of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China
    dDalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2022-12-07 Accepted:2023-03-01 Online:2023-05-18 Published:2023-04-20
  • Contact: * E-mail: fwzhang@sxu.edu.cn (F. Zhang), dongzhp@lzu.edu.cn (Z. Dong), bqiao@dicp.ac.cn (B. Qiao).
  • About author:First author contact:

    1Contributed equally to this work.

  • Supported by:
    National Natural Science Foundation of China(22272095);National Natural Science Foundation of China(22172067);Shanxi Scholarship Council of China(2022-003);Natural Science Research Foundation of Shanxi Province(20210302123434);Natural Science Foundation of Gansu(21YF5GA101)

Abstract:

Supported Pt nanoparticles (NPs) are highly active catalysts for heterogeneous catalytic hydrogenation reactions; however, controlling their selectivity remains the biggest challenge toward their applicability. Herein, we propose the formation of a highly selective and stable, surface-strained Pt-based nanocatalyst via a facile and scalable thermal reduction treatment. Spherical-aberration-corrected transmission electron microscopy (SACTEM) and various spectral analytic techniques reveal a strong metal-support interaction between the Pt NPs and carbon nanotubes (CNTs) support during the annealing process. Thereafter, a fraction of carbon atoms is etched from the carbon-coated Pt NPs, inducing a compressive strain on the surface of the Pt NPs. Notably, the chemoselectivity of the surface-strained Pt/CNTs-800H catalyst (where 800 represents the heat-treatment temperature; H represents a hydrogen atmosphere) is almost completely different compared to that of its pristine counterpart. This catalyst is used for the hydrogenation reactions of a styrene and nitrobenzene mixture as well as 4-nitrostyrene. Interestingly, similar findings were observed with 5 wt% Pt/C and Pt/rGO catalysts, confirming that this treatment could be generalized. Hence, it has great potential in the design and synthesis of carbon-based catalytic materials.

Key words: Pt-based nanocatalyst, Thermal reduction treatment, Strong metal-support interaction, Compressive strain, Selective hydrogenation