| Summary: | Hydrogen (H<sub>2</sub>) is the most abundant element in the universe and it is also a neutral energy carrier, meaning the environmental effects of using it are strictly related to the effects of creating the means of producing of that amount of Hydrogen. So far, the H<sub>2</sub> generation by water electrolysis research field did not manage to break the efficiency barrier in order to consider H<sub>2</sub> production as a technology that sustains financially its self-development. However, given the complexity of this technology and the overall environmental impacts, an up-to-date research and development status review is critical. Thus, this study aims to identify the main trends, achievements and research directions of the H<sub>2</sub> generation using pure and alkaline water electrolysis, providing a review of the state of the art in the specific literature. Methods: In order to deliver this, a Systematic Literature Review was carried out, using PRISMA methodology, highlighting the research trends and results in peer review publish articles over more than two years (2020–2022). Findings: This review identifies niches and actual status of the H<sub>2</sub> generation by water and alkaline water electrolysis and points out, in numbers, the boundaries of the 2020–2022 timeline research.
|
|---|