A FTIR Study of the Acidity of in situ Generated Bronsted Sites on NaY via Displacement Reactions
文献类型：期刊论文
| 作者 | Wu, Jingcheng1,2,3,4,5; Murphy, Brian M.2; Gould, Nicholas S.2; Wang, Chenguang1,3,4,5; Ma, Longlong1,3,4,5 ; Xu, Bingjun2
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| 刊名 | CHEMCATCHEM
 |
| 出版日期 | 2019-07-18 |
| 卷号 | 11期号:14页码:3253-3263 |
| 关键词 | Born-Haber cycle displacement extrinsic Bronsted acid sites FTIR zeolites |
| ISSN号 | 1867-3880 |
| DOI | 10.1002/cctc.201900764 |
| 通讯作者 | Xu, Bingjun(bxu@udel.edu) |
| 英文摘要 | 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. |
| WOS关键词 | METHYL LACTATE ; CATALYTIC DEHYDRATION ; SOLID ACIDS ; ZEOLITES ; ADSORPTION ; SELECTIVITY ; ACETATE ; METHANE |
| 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000477986300015 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 资助机构 | National Science Foundation, CBET ; National Key R&D Program of China ; China Scholarship Council ; CAS Pioneer Hundred Talents plan |
| 源URL | [http://ir.giec.ac.cn/handle/344007/25363]  |
| 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 |
| 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. |
入库方式： OAI收割
来源：广州能源研究所
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