journal article·2024-10

Electron Donor–Acceptor Activated Single Atomic Sites for Boosting Oxygen Reduction Reaction

Shenghua Ye, Dantong Zhang, Zhijun Ou, Lirong Zheng, Wenchao Liu, Wenda Chen, Yuan Xu, Yongliang Li, Xiangzhong Ren, Xiaoping Ouyang, Dongfeng Xue, Xueqing Yan, Qianling Zhang, Jianhong Liu

Advanced Functional Materials· Volume 34· Issue 40
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Abstract

Abstract Fabricating efficient non‐platinum‐group‐metal catalysts for the oxygen reduction reaction (ORR) in proton‐exchange membrane fuel cells still remains a big challenge. This study creates a unique bamboo‐like architecture of Mn and Fe single atomic sites (SASs) anchored on core‐shell structure of nanopaticles@carbon nanotubes (MnFe SASs/NPs@CNTs) via a precursor route, where the Fe nanoparticles (NPs) (identified as γ‐Fe and Austenite) are confined into CNTs, such an architecture exhibits compelling ORR activity and durability in 0.1 m HClO4. Experiments and calculations both reveal that the electron donor–acceptor paradigm between Mn SASs and Fe NPs launches a lattice‐electron coupling mechanism not only increasing occupation of π‐antibonding orbital in Mn−*O intermediates but also rising Jahn–Teller effect, thereby destabilize the Mn−*O intermediate and eventually facilitate the potential‐limiting step from *O to *OH. Such a coupling activation of the ORR‐inert Mn SASs greatly improves ORR performances of MnFe SASs/NPs@CNTs.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Electrochemical Analysis and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Nuclear Physics and Technology and Key Laboratory of HEDP of the Ministry of Education CAPT Peking University Beijing 100871 P. R. China

Graphene Composite Research Center College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518060 P. R. China

Shenzhen Eigen‐Equation Graphene Technology Co. Ltd. Shenzhen 518000 P. R. China

College of Chemistry and Chemical Engineering Qiqihar University Qiqihar 161006 P. R. China

Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 P. R. China

School of Materials Science and Engineering Xiangtan University Xiangtan 411105 P. R. China

Shenzhen Institute for Advanced Study University of Electronic Science and Technology of China Shenzhen 518110 P. R. China

Funding

National Natural Science Foundation of China · National Key Research and Development Program of China · Shenzhen Science and Technology Innovation Program

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