Abstract
With the rapid and sustainable development of economy and society, the problem of energy supply has been gradually highlighted. The use of traditional fossil energy has the disadvantages of unsustainable development and high pollution, and the development and utilization of clean energy is urgent. Hydrogen energy is considered as the most developed clean energy in the global energy transition. Under the background of low-carbon emission reduction, green hydrogen energy production technology has attracted extensive attention. The purpose of this paper focuses on the green hydrogen energy production technologies, mainly including hydrogen production by water electrolysis, microbial hydrogen production and photocatalytic water splitting for hydrogen production technologies. The principle, key materials and development status of each green hydrogen technology are discussed respectively and the outlook and suggestions of green hydrogen energy are given accordingly as well.
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