文献类型：期刊文献

英文题名：NiS-NiS2 heterostructure for efficient electrocatalytic overall urea splitting

作者：Huang, Zixun[1];Ou, Gang[1,2];Xie, Yusheng[1];Su, Yanyan[1];Li, Zhiwang[1];Zhao, Zepeng[1];Zhang, Rongbin[1];Wei, Hehe[4,5];Wu, Fengchi[3]

机构：[1]Jinan Univ, Coll Chem & Mat Sci, Guangzhou 511443, Peoples R China;[2]Guangzhou Panyu Polytech, Inst Adv Mat & Technol, Guangzhou 511483, Peoples R China;[3]Guangdong Polytech Normal Univ, Sch Innovat & Entrepreneurship, Guangzhou 510665, Peoples R China;[4]East China Univ Sci & Technol, Key Lab Adv Mat, Ctr Computat Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[5]East China Univ Sci & Technol, Res Inst Ind Catalysis, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2024

卷号：49

起止页码：1079

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20234615044716);WOS:【SCI-EXPANDED(收录号:WOS:001132850600001)】；

基金：This study was supported by the Guangdong Basic and Applied Basic Research Foundation (2020A1515110739) , Guangzhou Basic and Applied Basic Research Foundation (202102020432) , Research Funds of the Innovation Platform for Guangzhou Panyu Polytechnic (2022KYPT04) , Innovation Team Project in Guangdong Colleges and Universities (2021KCXTD009) , and the Start-up Funding of Jinan University. F.W. acknowledges the support by Science and Technology Projects in Guangzhou (2023A04J1382) and Youth Talent Project of Educational Commission of Guangdong Province (2020KQNCX041) . H. W. acknowledges the support by National Natural Science Foundations of China (22102057) and Shanghai Sailing Program (21YF1409400).

语种：英文

外文关键词：Heterostructure; Urea splitting; Interface; Hydrogen

摘要：Heterogeneous catalysts possess many advantages over single-phase catalysts. However, how to tune the heterogeneous interface state and density in heterostructures to optimize their electrocatalytic performance is still a challenge. Here, we propose a method for the preparation of NiS-NiS2 heterostructure by vulcanization of nickel foam at high temperature, which can effectively tune the weight ratio of NiS to NiS2 in heterostructure and their corresponding electrocatalytic urea oxidation reaction (UOR), hydrogen evolution reaction (HER) and overall urea splitting performance. The electrocatalytic activity show a trend of volcano curve with the increase of the ratio of NiS to NiS2, and the best electrocatalytic activity was obtained at the ratio of 6.74, in which the potentials at current density of 10 mA cm-2 of UOR, HER and overall urea splitting are 1.28 V, -49.5 mV and 1.34 V versus reversible hydrogen electrode (vs. RHE), and the Tafel slopes are 21.7, 74.1 and 90.9 mV dec-1, respectively. Furthermore, it also demonstrates excellent electrocatalytic stability. This work provides an effective way to tune the interfacial structure of heterogeneous electrocatalysts while significantly improving their electrocatalytic performance, which is beneficial to the development of efficient heterostructure and expand their applications.