期刊
JOURNAL OF CATALYSIS
卷 281, 期 1, 页码 177-187出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2011.04.015
关键词
Metal-organic frameworks; MIL-53; MIL-101; Esterification; Proton conductivity; Flexibility
资金
- US Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-AC02-98CH10886]
- TUDelft
- European Commission
- Netherlands Science Foundation
A new post-functionalization method for metal-organic frameworks (MOFs) has been developed to introduce acidity for catalysis. Upon treatment with a mixture of triflic anhydride and sulfuric acid, chemically stable MOF structures MIL-101(Cr) and MIL-53(Al) can be sulfated, resulting in a Bronsted sulfoxy acid group attached to up to 50% of the aromatic terephthalate linkers of the structure. The sulfated samples have been extensively characterized by solid-state NMR, XANES, and FTIR spectroscopy. The functionalized acidic frameworks show catalytic activity similar to that of acidic polymers like Nafion (R) display in the esterification of n-butanol with acetic acid (TOF similar to 1 min(-1) @ 343 K). Water adsorbs strongly up to 4 molecules per sulfoxy acid group, and an additional 2 molecules are taken up at lower temperatures in the 1-D pore channels of S-MIL-53(Al). The high water content and Bronsted acidity provide the structure S-MIL-53(Al) a high proton conductivity up to moderate temperatures. (C) 2011 Elsevier Inc. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据