文献类型：期刊文献

英文题名：Constructing a Crystalline NiCo2O4/Amorphous NiFeO(OH) Heterostructure for Boosting Electrocatalytic Water Oxidation

作者：Leng, Jia Heng[1];Wang, Zeng Guo[1];Li, Xiaoxia[2];Wang, Zhaoliang[1];Zhang, Xin Yu[3,4];Liu, Ji Kai[1];Liu, Peng Fei[1,4];Yang, Hua Gui[1,4]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]China Gen Nucl New Energy Holdings Co Ltd, Beijing 100071, Peoples R China;[3]East China Univ Sci & Technol, Sch Resources & Environm Engn, Dept Energy & Chem Engn, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Engn Res Ctr Resource Utilizat Carbon Containing W, Minist Educ, Shanghai 200237, Peoples R China

年份：2025

卷号：39

期号：36

起止页码：17522

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20253719153935);WOS:【SCI-EXPANDED(收录号:WOS:001563597600001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22309053) and the Science and Technology Commission of Shanghai Municipality (23YF1408500).

语种：英文

外文关键词：Amorphous materials - Catalyst activity - Cobalt compounds - Crystalline materials - Electrocatalysis - Heterojunctions - Hydrogen production - Iron compounds - Nickel - Nickel compounds - Oxidation

摘要：The construction of efficient oxygen evolution reaction (OER) electrocatalysts is significant in enhancing the efficiency of electrocatalytic hydrogen production. Heterostructure amorphous-crystalline materials have advantages with good conductivity and increased exposure to active sites. They have also been developed as prospective OER catalysts in an alkaline medium. This study synthesized an amorphous-crystalline composite heterostructure catalyst, NiCo2O4@a-NiFeO(OH), via a simple hydrothermal and impregnation treatment. Structural characterizations indicated that the NiCo2O4 scaffold exerts a crucial function in determining the morphology of amorphous NiFeO(OH). The catalyst demonstrated outstanding OER activity, requiring overpotentials of only 219.6 mV and 260.8 mV at current densities of 10 mA cm-2 and 100 mA cm-2, respectively. The enhanced OER performance is attributed to the synergistic electronic interactions within the heterostructure, combined with increased surface hydroxylation, which identifies Ni species as the key active sites for the OER. This study underscores the potential of heterostructure design in advancing electrocatalytic OER performance.