Issue 14, 2024

Constructing tri-coordinated Al (AlIII) sites to boost complete propane oxidation of the Pt/Al2O3 catalyst

Abstract

Complete oxidation of propane has drawn great attention in the fields of automotive emission control and volatile organic compound elimination. However, it is challenging to achieve high activity of this reaction due to the stability of propane. We here utilize a facile solvothermal method to construct tri-coordinated Al (AlIII) sites on the as-synthesized ST-Al2O3 support to alter the properties of supported Pt species. It is demonstrated that AlIII sites facilitate the dispersion and electron enrichment of supported Pt sites. Thus, Pt/ST-Al2O3 exhibits a superior activity toward complete propane oxidation, showing a 6.7-fold improvement in the turnover frequency over commercial Pt/Al2O3 catalysts. Meanwhile, Pt/ST-Al2O3 possesses a distinct reaction route originating from its stronger C–H and C–C cleavage capability, while having excellent activity not only in complete propane oxidation but also in the complete oxidation of other alkanes (CH4, C2H6, and n-C4H10). In addition, the AlIII construction strategy is successfully extended to more cases, e.g., Pd/ST-Al2O3 with higher Pd dispersion and electron density. This work provides a promising strategy for the control of the oxide support for advanced design and synthesis of alkane oxidation catalysts.

Graphical abstract: Constructing tri-coordinated Al (AlIII) sites to boost complete propane oxidation of the Pt/Al2O3 catalyst

Supplementary files

Article information

Article type
Paper
Submitted
06 May 2024
Accepted
07 Jun 2024
First published
10 Jun 2024

Catal. Sci. Technol., 2024,14, 4058-4067

Constructing tri-coordinated Al (AlIII) sites to boost complete propane oxidation of the Pt/Al2O3 catalyst

Y. You, A. Xu, Y. Lv, L. Yang, X. Tang, J. Tang, Y. Guo, Y. Cui, W. Zhan, L. Wang, Y. Guo and S. Dai, Catal. Sci. Technol., 2024, 14, 4058 DOI: 10.1039/D4CY00582A

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