Journal History

2020	The inaugural issue was released. Hydrogen was published as a quarterly journal.
2023	Hydrogen was indexed in Scopus (Elsevier), starting with Volume 1 (Issue 1).
2024	Hydrogen was indexed in Emerging Sources Citation Index (ESCI)—Web of Science (Clarivate Analytics), starting with Volume 1 (Issue 1). Hydrogen received its first CiteScore (2023) of 3.6, ranked in Q1 "Engineering (miscellaneous)" category.
2025	Hydrogen was indexed in Ei Compendex (Elsevier). Hydrogen received its first Impact Factor (3.0).