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Carbon-Confined Indium Oxides for Efficient Carbon Dioxide Reduction in a Solid-State Electrolyte Flow Cell
Zhitong Wang1, Yansong Zhou1, Dongyu Liu2,3
1School of Chemistry and Chemical Engineering, Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Hubei Engineering Research Center for Biomaterials and Medical Protective Materials, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology (HUST), 1037 Luoyu Rd, Wuhan, 430074, China.
A new carbon-confined indium oxide electrocatalyst enhances carbon dioxide (CO2) reduction to valuable chemicals. This stable and efficient catalyst achieves over 90% formate selectivity and demonstrates continuous formic acid production.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Electrochemical carbon dioxide (CO2) reduction is crucial for producing valuable chemicals and achieving carbon neutrality.
- Developing efficient and stable electrocatalysts and integrated devices remains a significant challenge.
Purpose of the Study:
- To develop a carbon-confined indium oxide electrocatalyst for enhanced CO2 reduction.
- To investigate the role of carbon confinement in improving catalyst stability and selectivity.
- To demonstrate the performance of the catalyst in both liquid-phase flow cells and solid-state reactors.
Main Methods:
- Synthesis of carbon-confined indium oxide electrocatalyst.
- Electrochemical characterization in a liquid-phase flow cell.
- Performance evaluation in a solid-state electrolyte mediated reactor.
Main Results:
- Carbon confinement prevents reductive corrosion of indium oxide, enhancing stability.
- The carbon layer optimizes intermediate adsorption, leading to high selectivity (>90%) and activity for CO2 reduction to formate.
- Continuous production of 0.12 M formic acid solution was achieved at 30 mA cm-2 in a solid-state reactor.
Conclusions:
- Carbon-confined indium oxide is a promising electrocatalyst for efficient and selective CO2 reduction.
- This approach offers significant insights for the parallel development of electrocatalysts and devices for carbon-neutral technologies.
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