Core Viewpoint - Hydrogen energy is a key clean energy source for achieving global carbon neutrality, with significant potential for growth in the green hydrogen market, particularly through water electrolysis technology [1]. Summary by Sections Hydrogen Production Methods - Hydrogen production methods include fossil fuel-based hydrogen, industrial by-product hydrogen, and water electrolysis, with water electrolysis being the most promising green hydrogen pathway due to its use of renewable energy [1]. Current Challenges in Water Electrolysis - High production costs: Electricity costs account for 60%-70% of total costs, combined with expensive equipment, making it more costly than fossil fuel hydrogen [2]. - Low energy conversion efficiency: The efficiency of converting electrical energy to hydrogen is low, affected by catalyst activity and electrode corrosion [3]. - Immature technology routes: Alkaline electrolysis (ALK) is easy to scale but has poor dynamic response; Proton Exchange Membrane (PEM) is costly and relies on imported materials; Solid Oxide Electrolysis (SOEC) is still in the validation stage [3]. Industry Innovations - Numerous domestic companies are actively seeking breakthroughs in technology research, equipment manufacturing, and project implementation in the water electrolysis hydrogen production sector [3]. Selected Companies in Water Electrolysis - A selection of 11 outstanding companies in the water electrolysis hydrogen production field has been highlighted, covering various technology routes such as ALK, PEM, and AEM [3][5]. - Notable companies include: - Wenshih Hydrogen Energy: First domestic provider of third-generation water electrolysis technology [5]. - Qingneng Co., Ltd.: Supplier of AEM water electrolysis systems and fuel cell stacks [5]. - Longi Hydrogen Energy: Provider of large-scale green hydrogen equipment and solutions [5].