Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (4): 547-556.DOI: 10.19894/j.issn.1000-0518.230346

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Preparation and Catalytic Performance of the Confined Pt Catalyst by Atomic Layer Deposition

Mei-Hua WANG1, Yu FENG1, Yun-Kun WANG1, Xu-Dong ZHAO1, Wen YANG1(), Chuan DONG2()   

  1. 1.Instrumental Analysis Center,School of Material Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China
    2.Institute of Environmental Science,Shanxi University,Taiyuan 030006,China
  • Received:2023-11-06 Accepted:2024-02-20 Published:2024-04-01 Online:2024-04-28
  • Contact: Wen YANG,Chuan DONG
  • About
  • Supported by:
    Shanxi Province Science and Technology Innovation Talent Team Special Project(202204051001002);Shanxi Province Basic Research Program Funding Project(20210302124471);the National Natural Science Foundation of China(22208230);Shanxi Provincial Excellent Support Program for Returned Overseas Scholars(20230033)


It is of great significance to select appropriate supports to support Pt nanoparticles for the preparation of efficient phenol hydrogenation catalysts. In this paper, Pt nanoparticles confined into the inner wall of titanium oxide nanotubes were prepared by template assisted method of atomic layer deposition technology. The specific preparation method was to use carbon nanofibers as templates, successively depositing Pt nanoparticles and thick titanium oxide shell on the templates surface. Then, the templates were removed by high-temperature sintering, through which Pt nanoparticles confined into the inner wall of titanium oxide nanotubes can be obtained. The particle size of the Pt nanoparticles ranged from 2.0 to 3.2 nm at a sintering temperature of 500 ℃, with an average size of 2.6 nm. Transmission electron microscopy results confirmed that Pt nanoparticles with highly uniform size were evenly dispersed and embedded into the inner wall of the hollow channel of titanium oxide nanotubes. The results of the catalytic performance of phenol hydrogenation show that the small-size Pt nanoparticles have the best phenol hydrogenation activity, with a Turnover Frequency (TOF) value of 482.1 h-1 at a sintering temperature of 500 ℃. In addition, compared with the conventional Pt nanoparticles with the same size supported on the outer wall of titanium oxide nanotubes, it is found that the confined catalyst shows better catalytic activity. Furthermore, due to the protective effect of titanium oxide nanotubes, it can effectively prevent the aggregation and falling off of Pt nanoparticles in the reaction process. After the reaction, the Pt content only decreased by 4.52%, and there were no significant changes in the morphology observed, thus the confined catalyst showing excellent catalytic stability compared with the supported catalyst.

Key words: Atomic layer deposition, Confined catalyst, Pt catalyst, Phenol hydrogenation

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