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Bifunctional Catalysts for Reversible Oxygen Evolution Reaction and Oxygen Reduction Reaction
Xing Wu1,2, Chongjian Tang1,2, Yi Cheng1,2
1School of Metallurgy and Environment, Central South University, Changsha, 410083, P. R. China.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|February 15, 2020
Summary
Developing efficient bifunctional oxygen catalysts for metal-air batteries and fuel cells is crucial. This review explores advanced composite catalysts designed to enhance both oxygen evolution and reduction reactions, aiming for low overpotentials.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Metal-air batteries (MABs) and reversible fuel cells (RFCs) require bifunctional oxygen catalysts for efficient operation.
- Existing catalysts often show a trade-off between performance in oxygen evolution reaction (OER) and oxygen reduction reaction (ORR).
- The development of catalysts with high activity for both OER and ORR is a significant challenge in energy storage and conversion.
Purpose of the Study:
- To review the evolution of bifunctional oxygen catalysts.
- To discuss strategies for designing high-performance catalysts for MABs and RFCs.
- To highlight the potential of multicomponent composites for improved catalytic activity.
Main Methods:
- Literature review and analysis of existing research on bifunctional oxygen catalysts.
- Discussion of catalyst design principles, focusing on active sites and conductive supports.
- Examination of structure-property relationships in advanced catalytic materials.
Main Results:
- Multicomponent composites with tailored active centers on conductive matrices show promise for bifunctional catalysis.
- Strategies for achieving high activity in both OER and ORR are being advanced.
- Low overpotentials are a key target for efficient bifunctional catalysts.
Conclusions:
- Advanced bifunctional oxygen catalysts are essential for the advancement of MABs and RFCs.
- Composite materials offer a promising avenue for overcoming the limitations of single-component catalysts.
- Further research into catalyst design can lead to significant improvements in energy conversion and storage technologies.
Keywords:
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