期刊
JOURNAL OF CATALYSIS
卷 252, 期 1, 页码 69-76出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2007.09.011
关键词
1,4-butanediol; gamma-butyrolactone; gold catalyst; aerobic oxidation; titania
Au/TiO2 catalysts prepared by the deposition-precipitation method showed excellent activity and selectivity in the oxidative cyclization of 1,4-butanediol to gamma-butyrolactone, with high yields (> 99%) under mild conditions (413 K, 1.25 MPa air). Catalysts with 3-8% gold loading and calcined at 573-673 K were all highly active for the formation of gamma-butyrolactone, as demonstrated by XRD, TEM, XPS, ICP and UV-vis DRS results. It is concluded that highly dispersed small (2-10 nm) gold particles are formed with the surface enrichment of gold. The ratio of cationic gold to metallic gold depends on the treatment temperature. These findings, combined with those of the activity tests, lead to the conclusion that the surface metallic nanosized gold particles are active sites. The catalyst can be reused with no drop in activity or selectivity. (c) 2007 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