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In Situ/Operando Characterization Techniques for Reaction Interface in Electrocatalytic CO2 Reduction.
Zezhong Xie1, Yukai Liu1, Lanqi He2
1MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, The Key Lab of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, School of Chemistry, School of Chemical Engineering and Technology, Instrumental Analysis and Research Center, Sun Yat-sen University, Guangzhou, 510275, P. R. China.
Small (Weinheim an Der Bergstrasse, Germany)
|May 3, 2025
Summary
Understanding the dynamic electrocatalyst interfaces is key for advancing the carbon dioxide reduction reaction (CO2RR). This review highlights in situ/operando techniques for uncovering reaction mechanisms and improving catalyst design for CO2RR.
Area of Science:
- Electrochemistry
- Catalysis
- Materials Science
Background:
- Carbon dioxide reduction reaction (CO2RR) is a vital sustainable technology for carbon capture and utilization.
- Electrocatalyst behavior at the reaction interface under operating conditions is complex and poorly understood.
- Dynamic changes in catalysts hinder mechanistic insights and optimization of CO2RR.
Purpose of the Study:
- To review in situ/operando characterization techniques for studying CO2RR interfaces.
- To discuss insights gained from these advanced techniques.
- To provide guidance for designing improved CO2RR electrocatalysts.
Main Methods:
- Focus on in situ/operando spectroscopic and microscopic techniques.
- Analysis of studies employing these methods to probe catalyst surfaces during CO2RR.
- Correlation of observed interfacial phenomena with catalytic performance.
Main Results:
- In situ/operando methods reveal dynamic structural and chemical changes of electrocatalysts.
- These techniques provide direct evidence of reaction intermediates and active sites.
- Understanding interfacial dynamics is critical for rational catalyst design.
Conclusions:
- Advanced in situ/operando characterization is essential for elucidating CO2RR mechanisms.
- Insights from these techniques enable targeted strategies for enhancing CO2RR efficiency and selectivity.
- Further development and application of these methods will accelerate progress in CO2 conversion.
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