Enzyme-like adaptive Fe-oxo-Co motifs boost oxygen reduction reaction for efficient Zn-air batteries  

作　　者：Tian Xia Jiawei Wan Xu Zhou Yilei He Fengmei Su Bifa Ji Yongping Zheng Dan Wang Ranbo Yu 

机构地区：[1]Department of Physical Chemistry,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]Key Laboratory of Biopharmaceutical Preparation and Delivery,Institute of Process Engineering Chinese Academy of Sciences,Beijing 100190,China [3]University of Chinese Academy of Sciences,Beijing 100049,China [4]Advanced Energy Storage Technology Research Center Shenzhen Institutes of Advanced Technology,Chinese Academy of Sciences,Shenzhen 518055,China [5]College of Chemistry and Environment Engineering,Shenzhen University,Shenzhen 518060,China

出　　处：《Nano Research》2025年第4期134-143,共10页纳米研究(英文版)

基　　金：the National Key Research and Development Program of China(Nos.2022YFA1204500 and 2022YFA1204502);the National Natural Science Foundation of China(Nos.22293043,51932001,52372170,and 92163209);the Beijing-Tianjin-Hebei Basic Research Cooperation Special Project(No.B2024204027);IPE Project for Frontier Basic Research(No.QYJC-2023-08).

摘　　要：Enzyme-like metal atomic site catalysts are promising alternatives of platinum group metals for oxygen reduction reaction(ORR)in fuel cell application.The local coordination structure at metal atomic sites plays a dominant role in optimizing the adsorption/desorption of oxygen intermediates to enhance ORR,but there is still a significant challenge in achieving.Herein,we report a type of stable and dynamically adjustable mono-oxygen-bridged asymmetric dual-atomic metal catalyst,in which the active Fe-oxo-Co motif demonstrates platinium-like ORR activity with a half-wave potential of 0.92 V vs.RHE in alkaline condition and a maximum power density of 228 mW·cm^(-2) in Zn-air batteries.Theoretical calculations reveal that the Fe-oxo ligands can act as electron regulators for neighboring Co sites,which optimize and promote the d-orbitals of Co metal shift towards lower energy levels,thereby weakening the adsorption of oxygen species,facilitating the progress of the ORR.More interestingly,the Fe-oxo-Co bond will dynamically change its strength to adaptively facilitate the intermediate steps during the ORR process.The design strategy towards enzyme-like adaptive behavior of active Fe-oxo-Co motifs brings significant hope for achieveing high performance fuel cell cathode materials.

关 键 词：ADAPTIVE oxygen reduction reaction dual atomic site Zn-air battery 

分 类 号：O64[理学—物理化学] O643.36[理学—化学]