Recent advances of noble-metal-free bifunctional oxygen reduction and evolution electrocatalysts. (21st May 2021)

• Record Type: Journal Article
• Authors: Zhao, Chang-Xin; Liu, Jia-Ning; Wang, Juan; Ren, Ding; Li, Bo-Quan; Zhang, Qiang
• Is Part Of: Chemical Society reviews. Volume 50:Number 13(2021)
• Page Start: 7745
• Page End: 7778
• Publication Date: 2021-05-21
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1039/d1cs00135c
• Languages: English
• ISSNs: 0306-0012

Abstract

Abstract : Bifunctional oxygen reduction and evolution constitute the core processes for sustainable energy storage. The advances on noble-metal-free bifunctional oxygen electrocatalysts are reviewed. Abstract : Oxygen reduction and evolution reactions constitute the core process of many vital energy storage or conversion techniques. However, the kinetic sluggishness of the oxygen redox reactions and heavy reliance on noble-metal-based electrocatalysts strongly limit the energy efficiency of the related devices. Developing high-performance noble-metal-free bifunctional ORR and OER electrocatalysts has gained worldwide attention, where much important progress has been made during the last decade. This review systematically addresses the design principles to obtain high-performance noble-metal-free bifunctional oxygen electrocatalysts by emphasizing strategies of both intrinsic activity regulation and active site integration. A statistical analysis of the reported bifunctional electrocatalysts is further carried out to reveal the composition–performance relationship and guide further exploration of emerging candidates. Finally, perspectives for developing advanced bifunctional oxygen electrocatalysts and aqueous rechargeable metal–air batteries are proposed.