International Journal of Hydrogen Energy, vol.118, pp.195-208, 2025 (SCI-Expanded)
The global shift towards renewable energy necessitates sustainable and equitable solutions to address the adverse impacts of fossil fuels and mitigate climate change. Green hydrogen, derived through renewable-powered water electrolysis, offers a viable pathway to decarbonize critical sectors such as heavy industry and transportation. However, its production entails significant social challenges across the supply chain, including labor equity and material sourcing issues in regions like China and South Africa. This study employs Social Life Cycle Assessment (S-LCA) frameworks, namely PSILCA and SHDB, to evaluate the societal implications of green hydrogen production in a conceptual energy hub in Portugal. Results reveal that material extraction and processing stages are the most socially impactful, contributing over 70% to total risk in multiple categories, with iridium and Nafion membranes identified as the largest contributors. The operational phase in Portugal accounted for a relatively minor contribution, under 10%, but highlighted regional challenges like wage equity and working conditions. By addressing these disparities and fostering equitable practices, this study provides actionable insights for integrating social sustainability into renewable energy transitions.