文献类型：期刊文献

英文题名：Unveiling the intrinsic properties of single NiZnFeOx entity for promoting electrocatalytic oxygen evolution

作者：Gu, Zhihao[1];Le, Jiabo[2];Wei, Hehe[1];Sun, Zehui[1];Hafez, Mahmoud Elsayed[1];Ma, Wei[1]

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn,Key Lab Adv Mat & Joint Int Re, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China

年份：2024

卷号：35

期号：4

外文期刊名：CHINESE CHEMICAL LETTERS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001169125400001)】；

基金：This work was supported by the Major Research Project (No. 92061108) , the National Natural Science Foundation of China (No. 22272052) , Shanghai Municipal Science and Technology Major Project (No. 2018SHZDZX03) , Xiamen University Opening Project of PCOSS (No. 201901) and Yongjiang Talent Introduction Programme (No. 2021A-115-G) .

语种：英文

外文关键词：Single entity; OER; Magnetic enhancement; Electrocatalysis

摘要：Although considerable research efforts have been devoted to the design and development of non-noble electrocatalysts for oxygen evolution reaction (OER), substantial enhancement of OER performance with commercial-scale water electrolysis remains a big challenge. This could result from the difficulties in detecting the intrinsic properties and overlooking the assembly process for electrochemical OER process. Here, we employ a microjet collision method to investigate the intrinsic OER activities of individual NiZnFeOx entities with and without a moderate magnetic field. Our results demonstrate that single NiZnFeOx nanoparticles (NPs) show the excellent OER performance with a lowest onset potential ( -1.35 V vs. RHE) and a greatest magnetic enhancement ( -118%) among bulk materials, single agglomerations and NPs. Furthermore, we explore the utility of theoretical investigation by density functional theory (DFT) calculations for studying OER process on NiZnFeOx surfaces without and with spin alignment, indicating monodispersed NiZnFeOx NPs with totally spin alignment facilitates the OER process under the external magnetic field. It is found that the well-dispersion of NiZnFeOx NPs would increase the electrical conductivity and the surface spin state, resulting in promoting their OER activities. This work provides a test for uncovering the essential roles of NPs assembly to a significant promotion of their magnet-assisted OER. (c) 2024 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.