Green hydrogen: A promising way to the carbon-free society

With increasing importance attached by the international community to global climate change and the pressing energy revolution, hydrogen energy, as a clean, efficient energy carrier, can serve as an important support for the establishment of a sustainable society. The United States and countries in Europe have already formulated relevant policies and plans for the use and development of hydrogen energy.While in China, aided by the ‘‘30·60” goal, the development of the hydrogen energy, production, transmission, and storage industries is steadily advancing. This article comprehensively considers the new energy revolution and the relevant plans of various countries, focuses on the principles, development status and research hot spots, and summarizes the different green hydrogen production technologies and paths. In addition, based on its assessment of current difficulties and bottlenecks in the production of green hydrogen and the overall global hydrogen energy development status, this article discusses the development of green hydrogen technologies.