Defects and morphology engineering for constructing V_(s)-Ni_(3)S_(2)@V_(s)-Cu_(2)S nanotube heterojunction arrays toward efficient bifunctional electrocatalyst for overall water splitting  

作　　者：Wenyuan Sun Alan Meng Lei Wang Guicun Li Jinfeng Cui Yongkai Sun Zhenjiang Li 

机构地区：[1]College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China [2]Key Laboratory of Optic-electric Sensing and Analytical Chemistryfor Life Science MOE,College of Chemistry and Molecular Engineering,Qingdao Universityof Science and Technology,Qingdao 266042,Shandong,China [3]College of Environment and Safety Engineering,Qingdao University of Science and Technology,Qingdao 266042,Shandong,China [4]Qingdao Huanghai University,Qingdao 266000,Shandong,China [5]College of Electromechanical Engineering,Qingdao University of Science and Technology,Qingdao 266061,Shandong,China

出　　处：《Journal of Energy Chemistry》2024年第7期29-40,共12页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No.52072196,52002200,52102106,52202262,22379081,22379080;Major Basic Research Program of Natural Science Foundation of Shandong Province under Grant No.ZR2020zD09;the Natural Science Foundation of Shandong Province under Grant No.ZR2020QE063,ZR202108180009,ZR2023QE059.

摘　　要：The development of highly active,stable and inexpensive electrocatalysts for hydrogen production by defects and morphology engineering remains a great challenge.Herein,S vacancies-rich Ni_(3)S_(2)@Cu_(2)S nan-otube heterojunction arrays were in-situ grown on copper foam(V_(s)-Ni_(3)S_(2)@V_(s)-Cu_(2)S NHAs/CF)for efficient electrocatalytic overall water splitting.With the merits of nanotube arrays and efficient electronic mod-ulation drived by the OD vacancy defect and 2D heterojunction defect,the resultant V_(s)-Ni_(3)S_(2)@V_(s)-Cu_(2)S NHAs/CF electrocatalyst exhibits excellent electrocatalytic activity with a low overpotential of 47 mV for the hydrogen evolution reaction(HER)at 10 mA cm^(-2) current density,and 263 mV for the oxygen evolution reaction(OER)at 50 mA cm^(-2) current density,as well as a cell voltage of 1.48 V at 10 mA cm^(-2).Moreover,the nanotube heterojunction arrays endows V_(s)-Ni_(3)S_(2)@V_(s)-Cu_(2)S NHAs/CF with outstanding stability in long-term catalytic processes,as confirmed by the continuous chronopotentiom-etry tests at current densities of 10 mA cm^(-2) for 100 h.

关 键 词：Nanotubearrays HETEROJUNCTION VACANCY Bifunctional electrocatalyst Overall water splitting 

分 类 号：TQ116.2[化学工程—无机化工] TQ426[一般工业技术—材料科学与工程] TB383