Trajectory Mapping and Future Charting of Hydrogen Energy Policy: A Systematic Review

This article conducts a systematic mapping and inductive analysis of existing work related to hydrogen energy policy in the Web of Science Core Collection from 1996 to 7 July 2023. First, based on bibliometrics, the research reveals the publication volume trends, influential contributors (countries, authors, organizations and journals). Second, bibliometric and content analysis were applied to vividly demonstrate the evolution of the research topic, discuss leading research topics, and provide valuable insights into issues that deserving appropriate attention in the future. The unequivocal role of policies in supporting the development of hydrogen energy is undeniable. In the future, the focal point of hydrogen energy policies should be concentrated on stimulating the creation of demand for green hydrogen, necessitating the effective evaluation of policy outcomes and ensuring the safety of hydrogen energy. Furthermore, the application scope of hydrogen energy extends beyond the transportation sector, holding potential for expansion into other high carbon-emitting domains. With the strengthening of international collaboration in hydrogen energy, considerations of energy justice and fairness are poised to become pivotal factors in cooperation, exerting a profound influence on the attainment of long-term development and environmental sustainability. These critical research directions will shape the future landscape of hydrogen energy policy and serve as an essential resource for policymakers, researchers, and stakeholders in this domain.