Abstract: The global energy is developing towards low-carbon and clean, hydrogen, as an efficient, clean energy and an ideal energy interconnection medium, has a wide range of application scenarios and is recognized to play a pivotal role in the process of energy transformation. The development trend of global hydrogen production technology is studied from the perspective of patent analysis. It is found that the research and development speed of electrolytic water hydrogen production technology is far ahead of that of fossil fuel hydrogen production technology in recent 10 years, and there is further growth potential in the future. Research on electrolytic water technology focuses on proton exchange membrane electrolytic water (PEM) technology and the design of electrolytic cell, control technology and power system design technology for matching renewable energy power. The United States and Japan are the major exporting countries of PEM electrolytic water technology. The existing technology systems in these regions are relatively mature and the technology monopoly degree in the industry is relatively high. The research of PEM electrolytic water technology in China is at the growth stage, the research, development and innovation are still primarily conducted by universities and research institutes, and the innovation achievements have not yet fully entered the market.

Key words: Hydrogen Production, Hydrogen, Water Electrolysis, Proton Exchange Membrane; Renewable Energy