Revealing the role of HBr in propane dehydrogenation on CeO2(111) via DFT-based microkinetic simulation

doi:10.1039/d2cp00733a

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	Revealing the role of HBr in propane dehydrogenation on CeO2(111) via DFT-based microkinetic simulation
	Jan, Faheem 1,2; Lian, Zan 1,2; Zhi, Shuaike 1,2; Yang, Min 1,2; Si, Chaowei 1,2; Li, Bo 1,2
刊名	PHYSICAL CHEMISTRY CHEMICAL PHYSICS
	2022-04-20
卷号	24 期号:16 页码:9718-9726
ISSN号	1463-9076
DOI	10.1039/d2cp00733a
通讯作者	Li, Bo(boli@imr.ac.cn)
英文摘要	HBr, as a soft oxidant, has been demonstrated to have a good balance between stability and selectivity in catalytic propane dehydrogenation. However, the origin of enhancements induced by HBr (hydrobromic acid) remains elusive. In this study, DFT-based microkinetic simulations were performed to reveal the reaction pathway and performance of propane dehydrogenation catalyzed by CeO2 in the presence of HBr. Three scenarios were under the investigations, which are pristine, dissociated HBr, and Br assisted surface hydroxyl. The calculations indicated that HBr significantly enhanced the adsorption of propane and provided alternative pathways for propene formation. More significantly, the energy barrier of C-H bond activation in propane was reduced with the assistance of HBr. It was very interesting to find that the reactivity of surface hydroxyl remarkably increased for C-H bond activation in the presence of HBr. The positive role of HBr is clearly evident from the microkinetic simulation. The TOFs of both propane conversion and propene formation increased after the introduction of HBr, which correlates with the apparent decreased activation energy. The reaction rate has a first order dependence on C3H8 and zero order dependence on HBr. The current study lays out a solid basis for further optimization of the performance of propane dehydrogenation.
WOS研究方向	Chemistry ; Physics
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000781516300001
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/172981]
专题	金属研究所_中国科学院金属研究所
通讯作者	Li, Bo
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Jan, Faheem,Lian, Zan,Zhi, Shuaike,et al. Revealing the role of HBr in propane dehydrogenation on CeO2(111) via DFT-based microkinetic simulation[J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS,2022,24(16):9718-9726.
APA	Jan, Faheem,Lian, Zan,Zhi, Shuaike,Yang, Min,Si, Chaowei,&Li, Bo.(2022).Revealing the role of HBr in propane dehydrogenation on CeO2(111) via DFT-based microkinetic simulation.PHYSICAL CHEMISTRY CHEMICAL PHYSICS,24(16),9718-9726.
MLA	Jan, Faheem,et al."Revealing the role of HBr in propane dehydrogenation on CeO2(111) via DFT-based microkinetic simulation".PHYSICAL CHEMISTRY CHEMICAL PHYSICS 24.16(2022):9718-9726.