Electronic structure modulating for supported Rh catalysts toward CO2 methanation

被引：29

作者：

Jiang, Yueyue ^{[1
]}

Lang, Junyu ^{[1
]}

Wu, Xuechen ^{[1
]}

Hu, Yun Hang ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

[2] Michigan Technol Univ, Dept Mat Sci & Engn, Houghton, MI 49931 USA

来源：

CATALYSIS TODAY | 2020年 / 356卷

关键词：

CO2; methanation; Rh catalysts; Oxide supports; Electronic structure; LOW-TEMPERATURE; CARBON-DIOXIDE; SELECTIVE METHANATION; HYDROGENATION; REDUCTION; RH/TIO2; TIO2; PHOTOCATALYST; NANOPARTICLES; PERFORMANCE;

D O I：

10.1016/j.cattod.2020.01.029

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Methanation of carbon dioxide is a promising approach to ameliorate greenhouse effect. Rhodium based catalysts have been intensively investigated due to its ability in cleavage of C-O bond, but the role of support in the catalysts was underestimated. In this regard, we explored the methanation of CO2 over Rh catalysts with three metal oxide supports (TiO2, Al2O3, and ZnO). It was found that Rh/TiO2 exhibited the highest catalytic activity with product yield of 455 mmol g(cat)-(1) h(-1) (CH4 and CO) at 370 degrees C and 2 MPa, which is 2 and 14 times higher than Rh/Al2O3 and Rh/ZnO, respectively. Moreover, the CH4 selectivity over Rh/TiO2 was higher than 95 %. The superior catalytic performance of Rh/TiO2 can be mainly attributed to its unique electronic structure associated with stronger Rh-TiO2 interaction and the existence of Ti3+ ions on TiO2.

引用

页码：570 / 578

页数：9

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