Ni_(1-x)Se(x=0和0.15)的水热合成及电催化性能研究  

Hydrothermal synthesis and electrocatalytic properties of Ni_(1-x)Se(x=0 and 0.15)

作　　者：杨灏 朱佳棋 霍地[1,2] Yang Hao;Zhu Jiaqi;Huo Di(Key Laboratory for Anisotropy and Texture of Materials Ministry of Education,Northeastern University,Shenyang 110819;Advanced Ceramics Research Center,School of Materials Science and Engineering,Northeastern University,Shenyang 110819)

机构地区：[1]东北大学材料各向异性与织构教育部重点实验室,沈阳110819 [2]东北大学材料科学与工程学院,先进陶瓷材料研究中心,沈阳110819

出　　处：《化工新型材料》2025年第1期189-193,共5页New Chemical Materials

基　　金：国家自然科学基金(51872033)。

摘　　要：以天然植物酚酸-没食子酸为还原剂,在温和水热反应条件下一步合成制备了Ni_(1-x)Se(x=0和0.15)纳米粉体。同时,研究了水热反应中反应温度和溶液pH对产物组成的影响。利用X射线衍射(XRD)、X射线光电子能谱(XPS)、扫描电镜(SEM)、透射电镜(TEM)以及电化学测试等方法对水热产物进行分析与表征。结果表明,在水热温度为180℃、pH=12的溶液中,所得产物为单相NiSe;在水热温度200℃,pH=7的溶液中产物为单相Ni_(0.85)Se。其中,NiSe纳米颗粒表现出明显的电催化析氢反应活性,在电流密度为10mA/cm^(2)时,NiSe电极的过电势为398mV,Tafel斜率为152mV/dec,并具有良好的稳定性。Ni_(1-x)Se(x=0 and 0.15)nano-powders were prepared by one-step synthesis using natural plant phenolic acid-gallic acid as reducing agent under mild hydrothermal reaction conditions.Meanwhile,the effects of reaction temperature and solution pH on the composition of the products in hydrothermal reaction were studied.XRD,XPS,SEM,TEM and electrochemical tests were also performed to characterize the hydrothermal products.The results showed that single-phase NiSe could be obtained at temperature of 180℃and pH=12,whereas at temperature of 200℃and pH=7,single-phase Ni 0.85 Se was obtained.Among them,NiSe nano-powders exhibited obvious electrocatalytic activities for the hydrogen evolution reaction,with an overpotential of 398mV,a Tafel slope of 152mV/dec,and good electrocatalytic stability at current density of 10mA/cm^(2).

关 键 词：硒化镍 没食子酸 水热合成 电化学性能 

分 类 号：TQ426[化学工程]