期刊
JOURNAL OF CATALYSIS
卷 309, 期 -, 页码 166-173出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2013.09.017
关键词
Pd-Ga nanoalloys; In situ LDH precursor route; Stable dispersion; Partial hydrogenation of acetylene
资金
- 973 Project [2011CBA00506]
- Support Plan Project [2012BAE06B08]
- National Natural Science Foundation
- Beijing Natural Science Foundation [2132032]
- Doctoral Program of the Ministry of Education
An effective and versatile synthetic approach is presented to produce highly dispersed bimetallic Pd-Ga catalysts that can be used as hydrogenation catalysts. Mg-Ga-Al-layered double hydroxide (LDH) was synthesized in situ on the surface of spherical alumina to obtain MgGaAl-LDH@Al2O3 precursor, followed by the introduction of PdCI42-. The positive charge of MgGaAl-LDH layer offers an opportunity to realize uniform dispersion of PdCl42-, which facilitates the formation of bimetallic Pd-Ga nanoalloys. Upon thermal reduction of PdCl42-/MgGaAl-LDH@Al2O3 precursor, highly stable dispersed bimetallic Pd-Ga/MgO-Al2O3 catalysts were obtained. Owing to high dispersion and synergistic effect of bimetallic nanoalloys, Pd-Ga/MgO-Al2O3 catalysts exhibited comparable activity and much higher selectivity compared with the monometallic Pd/MgO-Al2O3 in partial hydrogenation of acetylene. More significantly, this good catalytic performance can be totally retained after three times recycling due to the net trap confinement effect, which suppressed the migration and aggregation of bimetallic Pd-Ga nanoalloys. (C) 2013 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