Tuning product selectivity in CO2 hydrogenation over metal-based catalysts
Ling-Xiang Wang1, Liang Wang2, Feng-Shou Xiao2
1Department of Chemistry, Zhejiang University Hangzhou 310028 China.
Chemical Science
|November 25, 2021
Summary
Converting carbon dioxide (CO2) into chemicals via hydrogenation is challenging due to complex pathways and low selectivity. New catalysts offer a promising strategy to control product selectivity, favoring the reverse water-gas shift (RWGS) reaction for improved CO2 utilization.
Area of Science:
- Catalysis
- Chemical Engineering
- Materials Science
Background:
- CO2 conversion into chemicals is crucial for utilization but faces challenges in reaction pathways and product selectivity.
- Reverse water-gas shift (RWGS) and methanation are key competing reactions influencing selectivity in CO2 hydrogenation.
- Metal-based catalysts with tunable metal-support interactions, surface structure, and active site environments have been developed.
Purpose of the Study:
- To review recent advances in understanding CO2 hydrogenation reactions.
- To highlight emerging catalysts that regulate structure and switch reaction pathways.
- To discuss strategies for minimizing deep hydrogenation and favoring the RWGS reaction.
Main Methods:
- Focus on fundamental understanding of RWGS and methanation reactions in CO2 hydrogenation.
- Analysis of catalyst properties including strong metal-support interactions, metal surface structure, and local active site environment.
- Examination of catalyst design strategies for controlling product selectivity.
Main Results:
- Emerging catalysts can effectively regulate catalytic structure and switch reaction pathways in CO2 hydrogenation.
- Strong metal-support interactions, metal surface structure, and local active site environment are critical for tuning selectivity.
- Strategies discussed enable minimization of deep hydrogenation and promotion of the RWGS reaction.
Conclusions:
- Catalyst design based on understanding metal-support interactions, surface structure, and active site environments is key for selective CO2 hydrogenation.
- These strategies hold potential for improving the performance of industrial catalysts for CO2 utilization.
- Further research can lead to more efficient and selective catalysts for converting CO2 into valuable chemicals.
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