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). |
| 2026 | Hydrogen received its 2025 Impact Factor (5.6), ranked 66/191 (Q2) in “Chemistry, Physical” and 87/191 (Q2) in “Energy and Fuels”. |
Editor-in-Chief
| 2020–present | Editor-in-Chief: Prof. Dr. Thomas Klassen |
