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Halogen Cocatalysis in Electrocatalytic Systems.
Yanteng Xiao1, Chenfeng Xia1, Qihang Qian1
1School of Chemistry and Chemical Engineering, State Key Laboratory of Materials Processing and Die & Mould Technology, Key Laboratory of Material Chemistry for Energy Conversion and Storage (Ministry of Education), Hubei Key Laboratory of Material Chemistry and Service Failure, Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology (HUST), 1037 Luoyu Rd, Wuhan, 430074, China.
Halogens enhance electrocatalysis by modifying catalysts and interfaces. This review details their roles in improving reactions and synthesizing valuable halogenated compounds for renewable energy applications.
Area of Science:
- Electrochemistry
- Materials Science
- Green Chemistry
Background:
- Renewable-energy-driven electrocatalysis is key for net-zero emissions.
- Halogens (F, Cl, Br, I) are used in electrocatalysis but their roles are unclear.
- Understanding halogen roles is crucial for optimizing electrocatalytic systems.
Purpose of the Study:
- To provide a comprehensive overview of the cocatalytic roles of halogens in electrocatalysis.
- To elucidate the mechanisms by which halogens influence electrocatalytic performance.
- To discuss future opportunities in halogen-involved electrocatalysis.
Main Methods:
- Review of existing literature on halogen applications in electrocatalysis.
- Analysis of three key roles of halogens: catalyst incorporation, additive effects, and electrolyte ion functions.
- Discussion of challenges and future research directions.
Main Results:
- Halogens incorporated into catalysts tune electronic and physical properties.
- Halogen additives modify catalyst surface and interfacial microenvironments.
- Halide ions enhance performance via adsorption and mediate organic molecule oxidation, enabling synthesis.
Conclusions:
- Halogens play multifaceted cocatalytic roles in electrocatalysis.
- Strategic use of halogens can improve efficiency and enable synthesis of valuable compounds.
- Further research is needed to fully harness halogen potential in sustainable electrochemistry.
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