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Improved Catalytic Activity and Chemical Stability of Defective TiO2 Catalysts by Doping Rare Earth Metal Sc for Propane Dehydrogenation

  • Qing-He Shang
    Qing-He Shang
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Joint International Research Laboratory of Resource Chemistry, Ministry of Education, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
  • Jing-Nan Liu
    Jing-Nan Liu
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Joint International Research Laboratory of Resource Chemistry, Ministry of Education, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
    More by Jing-Nan Liu
  • Wan-Zhong Lang*
    Wan-Zhong Lang
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Joint International Research Laboratory of Resource Chemistry, Ministry of Education, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
    *Email: [email protected]
  • Xi Yan
    Xi Yan
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Joint International Research Laboratory of Resource Chemistry, Ministry of Education, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
    More by Xi Yan
  • Xiao-Jing Guo
    Xiao-Jing Guo
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Joint International Research Laboratory of Resource Chemistry, Ministry of Education, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
  • , and 
  • Ya-Jun Guo*
    Ya-Jun Guo
    The Education Ministry Key Laboratory of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, and Joint International Research Laboratory of Resource Chemistry, Ministry of Education, Shanghai Normal University, 100 Guilin Road, Shanghai 200234, China
    *Email: [email protected]
    More by Ya-Jun Guo
Cite this: Ind. Eng. Chem. Res. 2021, 60, 35, 12811–12820
Publication Date (Web):August 30, 2021
https://doi.org/10.1021/acs.iecr.1c01568
Copyright © 2021 American Chemical Society
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Abstract

Herein, scandium (Sc)-doped TiO2 (nSc/TiOx) catalysts were synthesized to investigate the impact of the doped rare earth metal Sc on its catalytic performance. It is found that appropriate Sc addition can facilitate the formation of oxygen vacancies (OVs) and active sites for the propane dehydrogenation (PDH) reaction, and the catalytic performance is evidently enhanced. However, excessive Sc clusters occur on the surface of the sample in the form of metal oxides as the amount of doped Sc increases, resulting in the decline of catalytic performance. The catalytic activity for the PDH reaction is closely related to the acidity of the Lewis acidic sites in nSc/TiOx catalysts. The introduction of Sc ions indeed enhances the lattice stability of the catalyst due to the formation of Ti–O–Sc bonds.

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The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.iecr.1c01568.

  • Low-temperature N2 adsorption/desorption isotherms and textural properties; energy-dispersive spectroscopy (EDS) elemental content images; HRTEM images; EPR spectra of bare TiO2 and TiO2(sol–gel) catalysts; semiquantitative XPS elemental analysis; corresponding semiquantitative analysis of NH3-TPD measurements; TGA profiles of spent catalysts; C3H8-TPD curves; UV/vis spectra and NH3-TPD patterns of 1.5 Sc/TiOx catalysts at different calcination temperatures; and elemental analysis of nSc/TiOx catalysts (PDF)

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Cited By


This article is cited by 1 publications.

  1. Weiyu Song, Kuichao Yu, Xiangyang Ji, Bowen Liu, Zhi Li, Yanjun Chen, Jian Liu. Computational Screening and Experimental Synthesis of Doped TiO2 for Propane Dehydrogenation. Energy & Fuels 2021, 35 (23) , 19624-19633. https://doi.org/10.1021/acs.energyfuels.1c03200