The invention provides a preparation method of ruthenium / molybdenum disulfide / reduced graphene oxide @ carbon fiber cloth catalytic electrode, which belongs to the technical field of energy utilization of hydrolysis hydrogen production, relates to the application of one-step hydrothermal synthesis method to prepare supported molybdenum sulfide / reduced graphene oxide on a conductive substrate, and further chemical reduction deposition of ruthenium to form a catalytic electrode with excellent electrocatalytic hydrogen production performance. The composite ruthenium / molybdenum disulfide / reduced graphene oxide electrode was prepared by in-situ hydrothermal synthesis and chemical reduction deposition on the surface of carbon fiber cloth. The bifunctional membrane electrode prepared by this method has good catalytic conductivity. The functional membrane is used as a material for electrocatalytic hydrogen production. The effect and benefit of the invention is that the catalytic conductive bifunctional film electrode prepared by the method can significantly improve the effect of electrocatalytic hydrogen production. In the process of electrocatalytic hydrogen production, the overpotential of hydrogen production is greatly reduced, the conductivity of molybdenum disulfide is improved, and hydrogen is easier to escape from the catalyst surface.
【技术实现步骤摘要】
一种钌/二硫化钼/还原氧化石墨烯@炭纤维布催化电极的制备方法
本专利技术属于能源化技术利用
,涉及应用一步水热合成法制备负载型硫化钼/还原氧化石墨烯,及进一步化学还原沉积钌形成最终催化电极。以炭纤维布作为基底,原位生长、化学还原沉积制备催化导电双功能膜电极。通过电催化(EC)技术分解水,进行能源化产氢的操作。
技术介绍
电催化析氢反应(Hydrogenevolutionreaction,简称HER)是指使用催化剂通过电化学方法产生氢气。反应过程中,通过质子或水分子的减少,在经历质子放电步骤(或称电化学步骤,Volmer反应)与复合脱附步骤(Tafel反应)及(或)电化学脱附步骤(Heyrovsky反应)后产生气态氢。类似于许多化学反应,电化学过程必须克服一定的活化能势垒(电化学过程中称为过电位)才能发生。因此,反应过程中,通常需要电催化剂的帮助来降低过电位,从而提高反应速率和效率。理想的HER电催化剂应具有良好平衡的氢键和氢气释放性能。利用密度泛函理论,Norskov预测了层状MoS2边缘部位的高HER活性。近年的电化学研究也证实了这一预测。二硫化钼二维层状材料具有比表面积大、成本低廉和催化活性高等特点,被视为非常有前景的电催化析氢催化剂,并有望代替贵金属Pt基电催化剂。层状MoS2纳米晶热力学不稳定的边缘位点是氢气产生的活性位点,即MoS2电催化活性受其端基长度影响,因此从纳米尺度上对MoS2材料进行合理设计和构建,通过对活性位点数量、催化活性及导电性的优化和调控,可有效提高MoS2的析氢催化 ...
【技术保护点】
1.一种钌/二硫化钼/还原氧化石墨烯@炭纤维布催化电极的制备方法,其特征在于,步骤如下:/n1)将四水合钼酸铵(NH
【技术特征摘要】
1.一种钌/二硫化钼/还原氧化石墨烯@炭纤维布催化电极的制备方法,其特征在于,步骤如下:
1)将四水合钼酸铵(NH4)6Mo7O24·4H2O、硫脲CH4N2S与尿素CO(NH2)2按摩尔比1:10:1.35溶解于还原氧化石墨烯分散液中,将混合物超声20min,得到混合溶液a;
2)将炭纤维布称重后,卷曲放入高压密闭反应器中,然后将混合溶液a倒入该高压密闭反应器,密封高压密闭反应器;
3)将高压密闭反应器在220℃下恒温24h,取出,自然冷却,得到二硫化钼/还原氧化石墨烯@炭纤维布催化电极膜b;
4)取出制备的二硫化钼/还原氧化石墨烯@炭纤维布催化电极膜b,去离子水与乙醇交替真空抽滤清洗干净后,在50℃~60℃温度条件下真空干燥;
5)将干燥后...
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