Issue 33, 2022

Support stabilized PtCu single-atom alloys for propane dehydrogenation

Abstract

PtCu single-atom alloys (SAAs) open an extensive prospect for heterogeneous catalysis. However, as the host of SAAs, Cu suffers from severe sintering at elevated temperature, resulting in poor stability of catalysts. This paper describes the suppression of the agglomeration of Cu nanoparticles under high temperature conditions using copper phyllosilicate (CuSiO3) as the support of PtCu SAAs. Based on quasi in situ XPS, in situ CO-DRIFTS, in situ Raman spectroscopy and in situ XRD, we demonstrated that the interfacial Cu+–O–Si formed upon reduction at 680 °C serves as the adhesive between Cu nanoparticles and the silicon dioxide matrix, strengthening the metal–support interaction. Consequently, the resistance to sintering of PtCu SAAs was improved, leading to high catalytic stability during propane dehydrogenation without sacrificing conversion and selectivity. The optimized PtCu SAA catalyst achieved more than 42% propane conversion and 93% propylene selectivity at 580 °C for at least 30 hours. It paves a way for the design and development of highly active supported single-atom alloy catalysts with excellent thermal stability.

Graphical abstract: Support stabilized PtCu single-atom alloys for propane dehydrogenation

Supplementary files

Article information

Article type
Edge Article
Submitted
04 iyl 2022
Accepted
22 iyl 2022
First published
22 iyl 2022
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2022,13, 9537-9543

Support stabilized PtCu single-atom alloys for propane dehydrogenation

X. Liu, X. Wang, S. Zhen, G. Sun, C. Pei, Z. Zhao and J. Gong, Chem. Sci., 2022, 13, 9537 DOI: 10.1039/D2SC03723H

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