The period from 2025 to 2030 is anticipated to bring about significant progress in the optimization of substrate-biomass interfaces within green hydrogen electrolyzers. This advancement is primarily driven by the increasing global emphasis on decarbonization and the critical necessity for renewable hydrogen production. Substrate-biomass interface engineering focuses on enhancing electrode surfaces' design and functionalization to maximize interaction with bio-derived feedstocks, thus improving electrolyzer efficiency and reducing operational costs. Companies like Siemens Energy and thyssenkrupp nucera are spearheading the development of advanced electrode materials and surface treatments to enable the direct electrolysis of biomass-derived solutions. Pilot programs integrating agricultural waste and lignocellulosic residues as feedstocks are already showcasing the economic and technical benefits of these innovations. By 2030, it is projected that green hydrogen production incorporating optimized biomass interfaces could represent up to 10% of Europe's renewable hydrogen output, translating to several gigawatts of electrolyzer capacity. The future trajectory includes pilot-scale validation, commercial deployment in heavy industry, and eventual widespread integration into utility-scale projects, driving further cost reductions and diversification of biomass feedstocks. This technological evolution is expected to unlock new value streams for green hydrogen electrolyzers, supported by technology demonstrations and favorable policy frameworks.