过渡金属硫化物NiS(x)@NF催化剂水热法制备及其析氢性能  

Preparation of transition metal sulfide NiS(x)@NF catalyst by hydrothermal method and its hydrogen evolution performance

作　　者：李佳优 张雨涵 姜楠 蒋博龙 LI Jiayou;ZHANG Yuhan;JIANG Nan;JIANG Bolong(Innovation Institute for Sustainable Maritime Architecture Research and Technology,Qingdao University of Technology,Qingdao 266000,Shandong,China;Institute of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266000,Shandong,China)

机构地区：[1]青岛理工大学滨海人居环境学术创新中心,山东青岛266000 [2]青岛理工大学环境与市政工程学院,山东青岛266000

出　　处：《化工进展》2025年第1期297-304,共8页Chemical Industry and Engineering Progress

基　　金：国家自然科学基金(22008134)。

摘　　要：电解水制氢是最具潜力的绿氢制备技术,而高效析氢反应(HER)催化剂的开发对其大规模推广意义重大。本文以硫脲为硫源,在泡沫镍(NF)上原位生长Ni_(3)S_(4),制备了一系列NiS(x)@NF过渡金属硫化物纳米片催化剂(x代表硫脲用量),对催化剂进行了结构、形貌以及金属价态等表征,并于1mol/L KOH碱液以及模拟海水中研究了催化剂的HER性能。催化剂制备采用简单的水热法,且直接利用NF上的Ni,无需额外加入Ni源,不仅制备方法简单、成本低,且活性相与NF基底结合牢固,稳定性好。HER性能测试结果表明,与NF相比,NiS(x)@NF催化剂在碱性电解液中HER性能得到明显提升,这归因于NF上原位生长Ni_(3)S_(4)纳米片。其中,NiS(0.14)@NF催化剂具有最小的过电势(η10=0.091V,η100=0.102V)、最高的内在催化活性,且Tafel斜率只有105.23m V/dec。催化剂在模拟海水中的HER活性明显降低,表明海水中的干扰组分对HER活性影响较大。但值得注意的是,在不同的电流负载下(10m A/cm^(2)、40m A/cm^(2)以及100m A/cm^(2)),Ni S(0.14)@NF催化剂在碱液及模拟海水中均显示出了较高的稳定性,这是由于采用原位生长法直接在NF上生长Ni_(3)S_(4),使活性相与NF基底结合牢固,不易脱落的缘故。Water electrolysis has been regarded as the most promising green hydrogen production technology.The development of highly efficient hydrogen evolution reaction(HER)catalysts is of great significance for its large-scale application.In this study,a series of NiS(x)@NF transition metal sulfide nanosheet catalysts(x represents the amount of thiourea)were prepared by in-situ growth of Ni_(3)S_(4) on nickel foam(NF)with thiourea as sulfur source.The structure,morphology and metal valence of the catalysts were characterized.The HER properties of the catalyst were studied in 1mol/L KOH electrolyte and simulated seawater respectively.The catalyst preparation was by a simple hydrothermal method and directly used the Ni on NF without adding Ni.The method was simple and low-cost,and the active phase of the catalyst was firmly attached onto the NF substrate presenting high stability.Compared with unvulcanized NF,the NiS(x)@NF catalysts presented a significantly improved HER performance in alkaline electrolytes.This could be attributed to the in-situ growth of Ni_(3)S_(4) nanosheets on NF.Among them,the NiS(0.14)@NF catalyst possessed the smallest overpotential(η10=0.091V,η100=0.102V)and the highest intrinsic catalytic activity with a Tafel slope of only 105.23mV/dec.The HER activity of the catalyst significantly decreased in the simulated seawater,indicating that the interfering components in the seawater had a significant impact on HER activity.However,it was worth noting that the NiS(0.14)@NF catalyst exhibited high stability in both alkaline solution and simulated seawater under different current loads(10mA/cm^(2),40mA/cm^(2),and 100mA/cm^(2)).This could also be ascribed to the in-situ growth of Ni_(3)S_(4) nanosheets on NF,which made the active phase NiS(x)firmly attach onto the NF substrate.

关 键 词：电化学 催化剂 泡沫镍硫化 海水电解 析氢反应过程 

分 类 号：TQ426[化学工程] O643.361[理学—物理化学]