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Heteroatom anchors Fe-Mn dual-atom catalysts with bi-functional oxygen catalytic activity for low-temperature rechargeable flexible Zn-air batteries

查看全文 作　　者：Yuting [1]He;Hongtao [1]Li;Yi [1]Wang;Yufei [1]Jia;Yongning [1]Liu;Qiang [1]Tan 高影响力作者 机构地区：[1]State Key Laboratory for Mechanical Behaviour of Materials,School of Materials Science&Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China高影响力机构 出　　处：《Journal of Energy Chemistry》索引2024年第90卷第3期,共12页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(21603171);the Basic Research Foundation of Xi’an Jiaotong University(xjh012020027)。 摘　　要：M-N-C(M=Fe,Co,Ni,etc.) catalyst owns high catalytic activity in the oxygen catalytic reaction which is the most likely to replace the Pt-based catalysts.But it is still a challenge to further increase the active site density.This article constructs the high-efficiency FeMn-N/S-C-1000 catalyst to realize ORR/OER bifunctional catalysis by hetero-atom,bimetal(Fe,Mn) doped simultaneously strategy.When evaluated it as bi-functional electro-catalysts,FeMn-N/S-C-1000 exhibits excellent catalytic activity(E_(1/2)=0.924 V,E_(j=10)=1.617 V) in alkaline media,outperforms conventional Pt/C,RuO_(2) and most non-precious-metal catalysts reported recently,Such outstanding performance is owing to N,S co-coordinated with metal to form multi-types of single atom,dual atom active sites to carry out bi-catalysis.Importantly,nitrite poison test provides the proof that the active sites of FeMn-N/S-C are more than that of single-atom catalysts to promote catalytic reactions directly.To better understand the local structure of Fe and Mn active sites,XAS and DFT were employed to reveal that FeMn-N_5/S-C site plays the key role during catalysis.Notably,the FeMn-N/S-C-1000 based low-temperature rechargeable flexible Zn-air also exhibits superior discharge performance and extraordinary durability at-40℃.This work will provide a new idea to design diatomic catalysts applied in low-temperature rechargeable batteries. 关 键 词：Fe Mn-N/S-C-1000 ORR OER Rechargeable flexible Zn-air batteries
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