Renaissance of Chlorine Evolution Reaction: Emerging Theory and Catalytic Materials
Jinjong Kim1, Muhammad Usama2,3, Kai S Exner2,3,4
1Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea.
Angewandte Chemie (International Ed. in English)
|October 7, 2024
Summary
Researchers are developing new, cost-effective catalysts for the chlorine evolution reaction (CER) beyond traditional platinum-based materials. This advancement aims to improve efficiency and selectivity in industrial chlorine production.
Area of Science:
- Electrochemistry
- Materials Science
- Chemical Engineering
Background:
- Chlorine (Cl2) is a vital industrial chemical produced mainly through the chlorine evolution reaction (CER) in chlor-alkali electrolyzers.
- Current catalysts, platinum group-metal (PGM)-based mixed metal oxides (MMOs), are expensive, scarce, and prone to selectivity issues from the oxygen evolution reaction.
Purpose of the Study:
- To review recent advancements in electrocatalyst research for the chlorine evolution reaction (CER).
- To explore novel catalyst materials and theoretical insights that overcome limitations of traditional MMOs.
Main Methods:
- Review of theoretical approaches for understanding CER mechanisms.
- Exploration of new catalyst materials beyond MMOs, including non-PGM oxides, single-site catalysts, and organic molecules.
Main Results:
- Theoretical studies have provided fundamental understanding and design principles for CER catalysts.
- Discovery of alternative CER catalysts, such as non-PGM oxides and single-site catalysts, some utilizing novel reaction pathways.
Conclusions:
- Significant progress has been made in CER electrocatalyst research over the past decade.
- Future research directions are identified for the development of more efficient and selective chlorine evolution catalysts.
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