Hydrogen has a wide range of sources, high calorific value, clean and carbon-free, energy storage, power generation, heat generation, flexible and efficient, and rich application scenarios. It is considered to be an ideal energy carrier to promote the clean and efficient utilization of traditional fossil energy and support the large-scale development of renewable energy. Hydrogen production by water electrolysis refers to the dissociation of water molecules under direct current to generate oxygen and hydrogen, which are precipitated from the anode and cathode of the electrolytic cell respectively. According to the different membrane materials of the electrolytic cell, hydrogen production by water electrolysis is usually divided into alkaline water electrolysis (AE), proton exchange membrane (PEM) hydrolysis, and high-temperature solid oxide hydrolysis (SOEC). Alkaline water electrolysis hydrogen production technology is mature, with low investment and operating costs, but there are problems such as alkali loss, corrosion, and high energy consumption; unlike alkaline water electrolysis hydrogen production, PEM water electrolysis hydrogen production uses perfluorosulfonic acid proton exchange membranes with good chemical stability, proton conductivity, and gas separation as solid electrolytes to replace asbestos membranes, which can effectively prevent electron transfer and improve the safety of electrolyzers.

           The membrane electrode includes a diffusion layer, a catalytic layer, and a proton exchange membrane. The characteristics and structure of the membrane electrode directly affect the performance and life of the PEM water electrolyzer. Therefore, the catalyst used for electrolysis of water plays a crucial role. Shaanxi Kaida Chemical Co., Ltd. specializes in the research and development and production of precious metal catalysts. The large-scale preparation technology is mature, and it provides key precious metal catalysts for many domestic professional manufacturers of PEM fuel cells and electrolytic water hydrogen production. By means of carrier screening, changing the structure and performance of the support, the dispersion of the active metal, and the improvement of the preparation process conditions, the precious metal catalysts with high activity, high stability and long life are produced. At present, PEM anode catalysts for electrolysis of water to produce hydrogen can usually only use Ir series catalysts due to harsh operating conditions, while cathode catalysts mainly choose Pt series catalysts; for PEM fuel cells, Pt series catalysts can be selected for anode and cathode catalysts. Through more than 20 years of systematic research, Kaida has deeply understood the effects of pH value, protective agent dosage, reduction conditions and other factors in the catalyst preparation system on the performance of nano-Ir and Pt series catalysts, and has achieved large-scale production of PEM fuel cells and electrolytic water hydrogen production cathode and anode precious metal catalysts through relevant measures.

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