水热法制备钌钴合金及其电催化析氢性能研究  

Study on the Preparation of Ruthenium-Cobalt Alloy by Hydrothermal Method and Its Electrocatalysis Performance for Hydrogen Evolution

作　　者：周正 杨熙 周晓荣 黄思颖 艾煜婷 卢德昆 ZHOU Zheng;YANG Xi;ZHOU Xiaorong;HUANG Siying;AI Yuting;LU Dekun(School of Chemical and Environmental Engineering,Wuhan Polytechnic University,Wuhan 430023,China)

机构地区：[1]武汉轻工大学化学与环境工程学院,湖北武汉430023

出　　处：《电镀与精饰》2022年第11期35-40,共6页Plating & Finishing

基　　金：2022年校立大学生科研项目;湖北省自然科学基金项目(2020CFB777)。

摘　　要：利用水热法合成钌钴(RuCo)合金电催化剂。通过正交设计法探究了水热时间、水热温度以及前驱体中金属离子摩尔比对RuCo合金电催化剂的电化学活性表面积的影响。研究表明:水热时间为4 h,水热温度为140℃,前驱体中Ru(Ⅲ)、Co(Ⅱ)离子摩尔比为1/1时,制备的RuCo合金电催化剂(7号样品)具有最大的电化学活性表面积。进一步研究了合成的各RuCo合金电催化剂的析氢反应活性、金属组成及相结构,结果表明:RuCo合金电催化剂(2号样品)在1 mol·L^(-1) KOH溶液中析氢反应活性最优,在Ru原子比降低的情况下保持良好的析氢反应活性。X射线荧光光谱分析表明其金属元素组成(原子比)为Ru占41%,Co占59%。X射线衍射法分析测试表明:合成的2号RuCo合金电催化剂为单质Ru、Co_(3)O_(4)以及Co_(2)O_(3)晶粒的复合物。Ruthenium-cobalt(RuCo)alloy electrocatalysts were synthesized by hydrothermal method.The effects of hydrothermal time,hydrothermal temperature and molar ratio of metal ions in precursor on the electrochemical active surface area of RuCo electrocatalyst were investigated by orthogonal design.The results show that the No.7 RuCo alloy electrocatalyst has the largest electrochemical active surface area when the hydrothermal time is 4 h,the hydrothermal temperature is 140℃and the molar ratio of Ru(Ⅲ)and Co(Ⅱ)ions in the precursor is 1/1.The electrocatalytic hydrogen evolution reaction activity,metal composition and phase structure of the RuCo alloy electrocatalysts were further studied.The results show that the electrocatalytic hydrogen evolution reaction activity of No.2 RuCo alloy electrocatalyst is the best in 1 mol·L^(-1) KOH solution,and good HER activity is maintained at a reduced Ru atom ratio.X-ray fluorescence analysis shows that the metal composition(atomic ratio)is Ru(41%)and Co(59%).X-ray diffraction analysis results show that the No.2 RuCo alloy electrocatalyst is a composite of Ru,Co_(3)O_(4) and Co_(2)O_(3) grains.

关 键 词：钌 钴 合金 析氢反应 电催化 

分 类 号：TQ116.2[化学工程—无机化工]