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Updated: Dec 18, 2025

Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
Published on: April 10, 2018
Efficient wettability-controlled electroreduction of CO2 to CO at Au/C interfaces.
Run Shi1, Jiahao Guo1,2, Xuerui Zhang1,2
1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
Controlling the interface wettability of gas diffusion electrodes is key for efficient electrochemical CO2 reduction. The Cassie-Wenzel state optimizes CO2 supply to active sites, enabling high-performance carbon-containing chemical synthesis.
Area of Science:
- Electrochemistry
- Materials Science
- Chemical Engineering
Background:
- Electrochemical CO2 reduction (CO2RR) offers a sustainable route for synthesizing carbon chemicals.
- Advancements in electrocatalyst design have been significant, yet interfacial phenomena remain underexplored.
- The role of wettability-controlled interfaces in CO2RR is a critical, understudied area.
Purpose of the Study:
- To systematically investigate the impact of wettability-modified gas-liquid-solid interfaces on CO2RR.
- To reveal the contribution of interfacial structures to CO2 transportation and electroreduction.
- To establish optimal interfacial conditions for efficient CO2RR at high current densities.
Main Methods:
- Systematic modification of wettability on a gold/carbon (Au/C) gas diffusion electrode.
- Confocal laser scanning microscopy (CLSM) to analyze gas-liquid-solid interface structures.
- Development and application of an in-situ fluorescence electrochemical spectroscopy method for quantitative analysis.
Main Results:
- The Cassie-Wenzel coexistence state was identified as the ideal interface structure for continuous CO2 supply.
- This optimal structure facilitates high current densities by ensuring efficient CO2 transport to Au active sites.
- Quantitative analysis revealed the critical role of interfacial structure in stabilizing interfacial CO2 concentration.
Conclusions:
- Interfacial wettability engineering is crucial for optimizing CO2RR performance.
- The Cassie-Wenzel state provides necessary CO2 mass transfer conditions for high-performance CO2RR.
- Understanding and controlling interfacial structures are vital for advancing sustainable CO2 utilization technologies.
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