文献类型：期刊文献

英文题名：N-carbon supported hierarchical Ni/Ni0.2Mo0.8N nanosheets as high-efficiency oxygen evolution electrocatalysts

作者：Li, Tongfei[1,3] Hu, Yingjie[4] Pan, Xingchi[3] Yin, Jingwen[3] Li, Yu[3] Wang, Yirong[3] Zhang, Yiwei[1] Sun, Hao[2] Tang, Yawen[3]

第一作者：Li, Tongfei

通信作者：Zhang, YW[1];Sun, H[2];Tang, YW[3]

机构：[1]Southeast Univ, Sch Chem & Chem Engn, Jiangsu Optoelect Funct Mat & Engn Lab, Nanjing 211189, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forest Prod, Jiangsu Key Lab Biomass Energy & Mat, Nanjing 210042, Peoples R China;[3]Nanjing Normal Univ, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Sch Chem & Mat Sci, Jiangsu Key Lab New Power Batteries, Nanjing 210023, Peoples R China;[4]Nanjing Xiaozhuang Univ, Nanjing Key Lab Adv Funct Mat, Nanjing 211171, Peoples R China

年份：2020

卷号：392

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000525862500150)】；

基金：The work was financially supported by National Natural Science Foundation of China (21875112, 21878047, 21676056 and 51673040), Six Talents Pinnacle Program of Jiangsu Province of China (JNHB-006), Qing Lan Project of Jiangsu Province (1107040167), A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) (1107047002), Fundamental Research Funds for the Central Universities (2242019K40137) and Excellent Science and Technology Innovation Group of Jiangsu Province.

语种：英文

外文关键词：NaCl; Ni/Ni0.2Mo0.8N; Heterostructure; Mott-schottky electrocatalysts; Oxygen evolution reaction

摘要：Rational development of high-performance and cost-effective electrocatalysts for the oxygen evolution reaction (OER) is of particular importance for renewable energy conversion and storage technologies. Herein, we developed a facile and easily scalable hard-template strategy to fabricate hierarchical Ni/Ni0.2Mo0.8N nanosheets (similar to 4.37 nm in thickness) in situ coupled with N-doped carbon (Ni/Ni0.2Mo0.8N@N-C) as an efficient electrocatalyst for the OER. The elaborate construction of Ni/Ni0.2Mo0.8N can validly regulate the electronic structure, increase the number of active sites, and facilitate diffusion kinetics. Benefiting from the coupling effect between hierarchical Ni/Ni0.2Mo0.8N and the N-carbon matrix, the resultant Ni/Ni0.2Mo0.8N@N-C exhibits excellent OER performance in alkaline media, including a low overpotential of 260 mV at 10 mA cm(-2), a small Tafel slope of 46 mV dec(-1), as well as remarkable stability for long-term electrolysis operation, significantly exceeding the findings for most previously reported OER electrocatalysts. Theoretical studies demonstrate that incorporation of Ni into Ni0.2Mo0.8N can effectively optimize water adsorption energy and enhance electronic states density near the Fermi level, which is conducive to accelerating the OER process. This work underlines a rational and new perspective for designing inexpensive and robust Mott-Schottky electrocatalysts toward OER for energy storage and conversion devices.