A FTIR Study of the Acidity of in situ Generated Bronsted Sites on NaY via Displacement Reactions

doi:10.1002/cctc.201900764

GIEC OpenIR

	A FTIR Study of the Acidity of in situ Generated Bronsted Sites on NaY via Displacement Reactions
	Wu, Jingcheng 1,2,3,4,5; Murphy, Brian M.2; Gould, Nicholas S.2; Wang, Chenguang 1,3,4,5; Ma, Longlong1,3,4,5 ; Xu, Bingjun 2
	2019-07-18
发表期刊	CHEMCATCHEM
ISSN	1867-3880
卷号	11 期号:14 页码:3253-3263
通讯作者	Xu, Bingjun(bxu@udel.edu)
摘要	Extrinsic Bronsted acid sites (BAS) on zeolites are generated on NaY upon exposure to organic acids through an ion exchange process. However, the acid-base chemistry of species adsorbed on the zeolites is largely unexplored. In this work, organic acids with varying acidity are employed to investigate the proton-transfer displacement within the micropores of NaY. The direction and degree of the displacement reactions are monitored by in situ transmission Fourier transform infrared (FTIR) spectroscopy. Two organic acids are sequentially introduced to NaY, and the direction and extent of the displacement reaction are followed by the diagnostic vibrational band of the adsorbed carboxylate species, i. e., nu([O-C-O](-)). Stronger acids are able to displace dissociatively adsorbed weaker acids on NaY, which is analogous to the solution-phase acid-base chemistry favoring the formation of weaker acids by stronger acids. The gas phase deprotonation energy correlates more closely with displacement reaction than pK(a), which is explicitly defined in the aqueous solution of acids. A thermochemical cycle is constructed to rationalize the observation that acid-base reactions in the zeolite pores could be predicted with the gas phase acidity of compounds involved in the displacement reactions.
关键词	Born-Haber cycle displacement extrinsic Bronsted acid sites FTIR zeolites
DOI	10.1002/cctc.201900764
关键词[WOS]	METHYL LACTATE ; CATALYTIC DEHYDRATION ; SOLID ACIDS ; ZEOLITES ; ADSORPTION ; SELECTIVITY ; ACETATE ; METHANE
收录类别	SCI
语种	英语
资助项目	National Science Foundation, CBET[CBET-1437129] ; National Key R&D Program of China[2018YFB1501504] ; China Scholarship Council ; CAS Pioneer Hundred Talents plan
WOS研究方向	Chemistry
项目资助者	National Science Foundation, CBET ; National Key R&D Program of China ; China Scholarship Council ; CAS Pioneer Hundred Talents plan
WOS类目	Chemistry, Physical
WOS记录号	WOS:000477986300015
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/25364
专题	中国科学院广州能源研究所
通讯作者	Xu, Bingjun
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, 2 Nengyuan Rd, Guangzhou 510000, Guangdong, Peoples R China 2.Univ Delaware, Ctr Catalyt Sci & Technol, Dept Chem & Biomol Engn, 150 Acad St, Newark, DE 19716 USA 3.Chinese Acad Sci, Key Lab Renewable Energy, 2 Nengyuan Rd, Guangzhou 510000, Guangdong, Peoples R China 4.Chinese Acad Sci, Guangdong Prov Key Lab New & Renewable Energy Res, 2 Nengyuan Rd, Guangzhou 510000, Guangdong, Peoples R China 5.Univ Chinese Acad Sci, Beijing 101408, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Wu, Jingcheng,Murphy, Brian M.,Gould, Nicholas S.,et al. A FTIR Study of the Acidity of in situ Generated Bronsted Sites on NaY via Displacement Reactions[J]. CHEMCATCHEM,2019,11(14):3253-3263.
APA	Wu, Jingcheng,Murphy, Brian M.,Gould, Nicholas S.,Wang, Chenguang,Ma, Longlong,&Xu, Bingjun.(2019).A FTIR Study of the Acidity of in situ Generated Bronsted Sites on NaY via Displacement Reactions.CHEMCATCHEM,11(14),3253-3263.
MLA	Wu, Jingcheng,et al."A FTIR Study of the Acidity of in situ Generated Bronsted Sites on NaY via Displacement Reactions".CHEMCATCHEM 11.14(2019):3253-3263.