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Photothermal CO2 hydrogenation to hydrocarbons over trimetallic Co–Cu–Mn catalysts.
- Source :
- Green Chemistry; 8/21/2021, Vol. 23 Issue 16, p5775-5785, 11p
- Publication Year :
- 2021
-
Abstract
- Photocatalytic CO<subscript>2</subscript> reduction is a highly vital process for converting CO<subscript>2</subscript> into valuable chemicals. However, the reaction always proceeds less efficaciously at low temperature. A combination of optical and thermal conditions is one of the feasible approaches to achieve the reaction with high efficiency and has gained much attention recently. In the present work, we prepared several Co–Cu–Mn trimetallic catalysts via a simple co-precipitation method, which were used in catalyzing photothermal CO<subscript>2</subscript> reduction to hydrocarbons. The metal composition and reduction temperature of the catalysts had important effects on their structural and photoelectrical characteristics and adsorption behaviors, further resulting in diverse catalytic performances. Among the prepared trimetallic catalysts, Co<subscript>7</subscript>Cu<subscript>1</subscript>Mn<subscript>1</subscript>O<subscript>x</subscript>(200), with a Co/Cu/Mn molar ratio of 7/1/1 and reduced at 200 °C in H<subscript>2</subscript> for 2 h, could produce CH<subscript>4</subscript> with an activity of 14.5 mmol g<subscript>cat</subscript><superscript>−1</superscript> h<superscript>−1</superscript> in 10% CO<subscript>2</subscript>/30% H<subscript>2</subscript>/60% N<subscript>2</subscript>, and CH<subscript>4</subscript> and C<subscript>2+</subscript> hydrocarbons with the activities of 15.9 and 7.5 mmol g<subscript>cat</subscript><superscript>−1</superscript> h<superscript>−1</superscript> in 25% CO<subscript>2</subscript>/75% H<subscript>2</subscript>, respectively. The present strategy for constructing trimetallic oxide catalysts for the photothermal reaction not only provides a highly active catalyst for CO<subscript>2</subscript> utilization, but also offers a potential possibility for reducing the high temperature of conventional thermal reactions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14639262
- Volume :
- 23
- Issue :
- 16
- Database :
- Complementary Index
- Journal :
- Green Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 151959334
- Full Text :
- https://doi.org/10.1039/d1gc01152a