Transient Bronsted Acid Sites in Propene Aromatization over Zn-Modified HZSM-5 Detected by Operando Dual-Beam FTIR

doi:10.1021/acs.jpcc.9b01415

	Transient Bronsted Acid Sites in Propene Aromatization over Zn-Modified HZSM-5 Detected by Operando Dual-Beam FTIR
	He, Ning 1,3; Guo, Hongchen 1,3; Liu, Jiaxu 1,3; Lin, Long 1,3; Wang, Jilei 1,3; Zhou, Wei 1,3; Miao, Cuilan 1,3; Liu, Chunyan 1,3; Xin, Qin 2
刊名	JOURNAL OF PHYSICAL CHEMISTRY C
	2019-03-28
卷号	123 期号:12 页码:7283-7289
ISSN号	1932-7447
DOI	10.1021/acs.jpcc.9b01415
通讯作者	Guo, Hongchen(hongchenguo@dlut.edu.cn)
英文摘要	An operando dual-beam Fourier transform infrared spectrometer was developed to identify the transient Bronsted acid sites (BAS) in propene aromatization over acidic HZSM-5 and Zn-modified HZSM-5 catalysts under real reaction conditions. The eliminated signals include gas-phase I molecular vibrations and heat irradiation at reaction temperatures. We directly observed that the initial activation of propene over Zn2+ of Zn-modified HZSM-5 generated a substantial number of transient BAS, which serve as active sites for the subsequent aromatization reactions. Moreover, during Transient Bronsted Acid Sites the propene aromatization process, the desorption of aromatic precursors over the Zn2+ of Zn/HZSM-5 is easier than that over the H+ of HZSM-5, resulting in an enhanced aromatics productivity. A density functional theory calculation certified the priority of the metallic Zn2+ sites over BAS in the competitive activation of propene molecules. The generation of transient BAS is energetically favorable.
资助项目	National Natural Science Foundation of China[21603023] ; Joint Fund Project of NSFC-Liaoning Province[U1508205]
WOS关键词	PROPANE AROMATIZATION ; ACTIVATION ; CATALYSIS ; CATIONS
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000463115500037
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; Joint Fund Project of NSFC-Liaoning Province ; Joint Fund Project of NSFC-Liaoning Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Joint Fund Project of NSFC-Liaoning Province ; Joint Fund Project of NSFC-Liaoning Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Joint Fund Project of NSFC-Liaoning Province ; Joint Fund Project of NSFC-Liaoning Province ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Joint Fund Project of NSFC-Liaoning Province ; Joint Fund Project of NSFC-Liaoning Province
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/165580]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Guo, Hongchen
作者单位	1.Dalian Univ Technol, State Key Lab Fine Chem, 2 Linggong Rd, Dalian 116024, Peoples R China 2.Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 3.Dalian Univ Technol, Sch Chem Engn, 2 Linggong Rd, Dalian 116024, Peoples R China
推荐引用方式 GB/T 7714	He, Ning,Guo, Hongchen,Liu, Jiaxu,et al. Transient Bronsted Acid Sites in Propene Aromatization over Zn-Modified HZSM-5 Detected by Operando Dual-Beam FTIR[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2019,123(12):7283-7289.
APA	He, Ning.,Guo, Hongchen.,Liu, Jiaxu.,Lin, Long.,Wang, Jilei.,...&Xin, Qin.(2019).Transient Bronsted Acid Sites in Propene Aromatization over Zn-Modified HZSM-5 Detected by Operando Dual-Beam FTIR.JOURNAL OF PHYSICAL CHEMISTRY C,123(12),7283-7289.
MLA	He, Ning,et al."Transient Bronsted Acid Sites in Propene Aromatization over Zn-Modified HZSM-5 Detected by Operando Dual-Beam FTIR".JOURNAL OF PHYSICAL CHEMISTRY C 123.12(2019):7283-7289.