Trends in the catalytic reduction of CO2 by hydrogen over supported monometallic and bimetallic catalysts

被引：161
|
作者：
Porosoff, Marc D. [1 ]
Chen, Jingguang G. [2 ]
机构：
[1] Univ Delaware, Dept Chem Engn, CCST, Newark, DE 19716 USA
[2] Columbia Univ, Dept Chem Engn, New York, NY 10027 USA
来源：
JOURNAL OF CATALYSIS | 2013年 / 301卷
基金：
美国国家科学基金会;
关键词：
CO2; conversion; Bimetallic catalysts; Oxide supports; d-Band center; GAS-SHIFT REACTION; LOW-TEMPERATURE HYDROGENATION; CARBON-DIOXIDE; SURFACE; METHANATION; TRANSIENT; BENZENE; MODEL; PTCO;
D O I：
10.1016/j.jcat.2013.01.022
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The reduction of CO2 by hydrogen has been conducted on supported catalysts in a batch reactor. Catalysts synthesized on a reducible support (CeO2) showed higher activity than on an irreducible support (gamma-Al2O3). The active metal also played an important role in controlling the selective reduction of CO2 to CO instead of CH4. Extended X-ray absorption fine structure (EXAFS) and transmission electron microscopy (TEM) confirmed the formation of uniform, bimetallic particles. Among the monometallic and bimetallic catalysts evaluated in the current study, PdNi/CeO2 was the most active bimetallic catalyst, but also formed the greatest amount of CH4, while PtCo/gamma-Al2O3 showed the highest selectivity to CO with little CH4 production. The selectivity was correlated with electronic properties of the supported catalysts by using values of surface d-band center. The general trends observed should provide insights in identifying desirable catalysts for the reduction of CO2. (C) 2013 Elsevier Inc. All rights reserved.
引用
收藏
页码：30 / 37
页数：8
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