Synergistic Mechanism of Platinum-GaOx Catalysts for Propane Dehydrogenation

Tingting Zhang; Chunlei Pei; Guodong Sun; Sai Chen; Zhi-Jian Zhao; Shijia Sun; Zhenpu Lu; Yiyi Xu; Jinlong Gong

doi:10.1002/anie.202201453

Synergistic Mechanism of Platinum-GaO_x Catalysts for Propane Dehydrogenation

Angew Chem Int Ed Engl. 2022 Aug 26;61(35):e202201453. doi: 10.1002/anie.202201453. Epub 2022 Jul 18.

Authors

Tingting Zhang^{1

2}, Chunlei Pei^{1

2}, Guodong Sun^{1

2}, Sai Chen^{1

2

3}, Zhi-Jian Zhao^{1

2}, Shijia Sun^{1

2}, Zhenpu Lu^{1

2}, Yiyi Xu^{1

2}, Jinlong Gong^{1

2

4

3}

Affiliations

¹ Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China.
² Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072, China.
³ Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Binhai New City, Fuzhou, 350207, China.
⁴ Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China.

PMID: 35849100
DOI: 10.1002/anie.202201453

Abstract

The synergy between metals and metal oxides can effectively improve the heterogeneous catalytic process. This paper describes the intrinsic effect of Pt modification over GaO_x (Pt-GaO_x ) on propane dehydrogenation. The presence of Pt promotes H₂ dissociation and surface coverage of hydrogen species, which is beneficial for the activation of C-H in propane. With excessive Pt, Ga^δ+ can be further reduced to form Pt-Ga alloy with less surface hydrogen species. Consequently, the relative propylene formation rate between Pt-GaO_x and the summed contribution of individual Pt and GaO_x increases linearly with the content of hydrogen species. Optimally, the relative propylene formation rate of Pt-GaO_x with 0.03 wt % Pt exceeds 25 % of the summed contribution of individual components.

Keywords: Gallium Oxide; Platinum; Propane Dehydrogenation; Synergistic Effect.

Grants and funding

22121004/Innovative Research Group Project of the National Natural Science Foundation of China