Ru-Ni/C催化剂在碱性介质中的析氢性能研究

氢气的高效生产和利用对构建清洁低碳的能源体系至关重要, 碱性电解水制氢是目前我国应用最多的制氢技术，但也存在能耗较高的难题。因此迫切需要寻找低成本、高性能的电催化剂用于析氢反应（HER）提高水分解效率。本工作采用沉积沉淀法合成了双金属负载型Ru-Ni/C催化剂，用透射电子显微镜（TEM）和X射线衍射（XRD）对催化剂的形貌和结构进行了表征。用线性扫描伏安法（LSV）、电化学阻抗谱（EIS）等测试了HER性能。结果显示炭载体上RuNi双金属均匀分散，在电流密度为10 mA?cm-2时过电位仅为34.4 mV且稳定性良好，Tafel斜率仅为60.33 mV?dec-1，比商用Pt/C还小。表明Ru-Ni/C催化剂展现出了优异的HER电催化活性和稳定性，RuNi双金属之间的协同效应很大程度上促进了催化剂的催化性能，该研究为发展高效的碱性电解水制氢阴极催化剂提供了新思路。

Hydrogen Evolution Research of Ru-Ni/C Catalyst in Alkaline Medium

The efficient production and utilization of hydrogen is crucial to building a clean and low-carbon energy system. Hydrogen production from alkaline electrolyzed water is the most widely used hydrogen production technology in China, but there is also a problem of high energy consumption. Therefore, it is urgent to find low-cost and high-performance electric catalysts for hydrogen evolution reaction (HER) to improve water decomposition efficiency. In this work, bimetallic supported Ru-Ni/C catalysts were synthesized by deposition precipitation method. The morphology and structure of the catalyst were characterized by Transmission Electron Microscope (TEM) and X-Ray Diffraction (XRD). The HER performance was tested by Linear Sweep Voltammetry (LSV), Electrochemical Impedance Spectroscopy (EIS), etc. It was shown that the RuNi bimetallic on the carbon support was uniformly dispersed, and the overpotential was only 34.4 mv at the current density of 10 mA?cm-2 and the stability was good, Tafel slope is only 60.33 mV?dec-1, which is smaller than commercial Pt/C. It shows that Ru-Ni/C catalyst exhibits excellent HER electrocatalytic activity and stability. The synergistic effect between RuNi bimetals greatly promotes the catalytic performance of the catalyst. This research provides a new idea for the development of an efficient cathode catalyst for hydrogen production from alkaline water splitting.