Sustainable green hydrogen production with emphasis on techno economic assessment and methodological gaps

Abstract The escalating global demand for clean energy has intensified focus on green hydrogen as a sustainable alternative to fossil fuels. This research conducts a systematic literature review complemented by a comprehensive bibliometric analysis using VOSviewer to map research trends and collaborations. The study emphasizes techno-economic assessment through indicators like NPV, IRR, and LCOH. Following PRISMA protocols and the PICO framework via Parsifal software, we searched Scopus, Web of Science, and IEEE Xplore (2015–2025). After rigorous screening, 15 of 87 initially identified papers met all research criteria. Bibliometric analysis revealed key thematic clusters and international collaboration patterns, while the systematic review demonstrated substantial advances in quantitative methods for evaluating hydrogen viability, particularly in solar and wind applications. Nevertheless, critical gaps persist in methodological standardization and empirical validation across diverse geographical and economic contexts.