Abstract
Biomass-based hydrogen production is an innovative approach to realize carbon-neutral energy solutions. Despite their promise, both structures differ in terms of the biomass energy domain, which is at the entry point of the technology, and the hydrogen energy domain, which is at the exit point of the technology. In this study, we conducted structural and predictive analyses by cross domain bibliometric analysis to clarify the differences in the structures and perspectives of researchers in cross domains and to suggest ways to strengthen collaboration to promote innovation. Our study reveals that the hydrogen energy domain has a balanced discussion on realizing a hydrogen society using biomass-based hydrogen production technology, while the biomass energy domain has a strong interest in the process of processing biomass. We find that changing perspectives in any academic domain presents a different structure. This comparative analysis reveals the importance of synergistic progress through interdisciplinary efforts. By filling these gaps, our findings contribute to a roadmap for future research and policy development in renewable energy and highlight the importance of a unified approach to sustainable hydrogen production.