Effect of ceria morphology on the catalytic activity of Co/CeO2 catalyst for ammonia synthesis

被引：63

作者：

Lin, Bingyu ^{[1
]}

Liu, Yi ^{[1
]}

Heng, Lan ^{[1
]}

Ni, Jun ^{[1
]}

Lin, Jianxin ^{[1
]}

Jiang, Lilong ^{[1
]}

机构：

[1] Fuzhou Univ, Natl Engn Res Ctr Chem Fertilizer Catalyst, Sch Chem Engn, Fuzhou 350002, Fujian, Peoples R China

来源：

CATALYSIS COMMUNICATIONS | 2017年 / 101卷

基金：

中国国家自然科学基金;

关键词：

Co/CeO2; catalyst; Ceria morphology; Ammonia synthesis; Ce3+ concentration; SUPPORTED COBALT CATALYST; CARBON; OXIDATION; CEO2; CO;

D O I：

10.1016/j.catcom.2017.07.015

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：

A series of Co/CeO2 catalysts with different morphology of CeO2 support were prepared. It was shown that part of Co species could be introduced into the CeO2 lattice and thus a new Co-O bonding would be created for the ceria-supported Co catalysts. The morphology of CeO2 was found to affect the reduction of both the cobalt oxides and CeO2. A larger amount of CeO2 was reduced in the case of Co supported on polyhedral CeO2. Catalytic tests showed that the higher concentration of Ce3+ and the lower binding energy of Co species present in the catalyst are key factors that led to higher ammonia synthesis rates for the Co/CeO2 catalysts.

引用

页码：15 / 19

页数：5

共 25 条

[1]

Aika K.-i., 1995, Ammonia: Catalysis and Manufacture, P103

[2]

[Anonymous], NIST STANDARD REFERE

[3] Morphology Effect of CeO2 Support in the Preparation, Metal-Support Interaction, and Catalytic Performance of Pt/CeO2 Catalysts [J].