Facilitating the reduction of V–O bonds on VOx/ZrO2 catalysts for non-oxidative propane dehydrogenation. Issue 15 (24th March 2020)

• Record Type: Journal Article
• Authors: Xie, Yufei; Luo, Ran; Sun, Guodong; Chen, Sai; Zhao, Zhi-Jian; Mu, Rentao; Gong, Jinlong
• Is Part Of: Chemical science. Volume 11:Issue 15(2020)
• Page Start: 3845
• Page End: 3851
• Publication Date: 2020-03-24
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d0sc00690d
• Languages: English
• ISSNs: 2041-6520

Abstract

Abstract : Low coordinated VO x species on ZrO2 with more reduced V–O bonds leads to improved catalytic activity for propane dehydrogenation. Abstract : Supported vanadium oxide is a promising catalyst in propane dehydrogenation due to its competitive performance and low cost. Nevertheless, it remains a grand challenge to understand the structure–performance correlation due to the structural complexity of VO x -based catalysts in a reduced state. This paper describes the structure and catalytic properties of the VO x /ZrO2 catalyst. When using ZrO2 as the support, the catalyst shows six times higher turnover frequency (TOF) than using commercial γ-Al2 O3 . Combining H2 -temperature programmed reduction, in situ Raman spectroscopy, X-ray photoelectron spectroscopy and theoretical studies, we find that the interaction between VO x and ZrO2 can facilitate the reduction of V–O bonds, including VO, V–O–V and V–O–Zr. The promoting effect could be attributed to the formation of low coordinated V species in VO x /ZrO2 which is more active in C–H activation. Our work provides a new insight into understanding the structure–performance correlation in VO x -based catalysts for non-oxidative propane dehydrogenation.