Research Information System
Kent akademisi (Online), vol.19, no.1, pp.1-21, 2026 (TRDizin)
Current transportation systems face numerous issues, including the reduction of carbon emissions, noise pollution, and other pollutants. These concerns mainly stem from escalating environmental and economic issues across society. These constraints have compelled many researchers and business owners in the transportation sector to seek cleaner, more efficient, and more sustainable alternatives. Recently, the transportation sector has increasingly focused on hydrogen and fuel cells as key areas of research. The article aims to identify the main themes in the research on hydrogen and fuel cells within the field of transportation science and technology studies, using bibliometric analysis. VOSviewer was employed to evaluate 984 articles related to hydrogen and fuel cells under the Transportation Science Technology category from the Web of Science database. The literature was examined in terms of annual trends in publications, research institutions, and leading journals. Core topics and focal areas were identified through literature co-citation analysis and keyword co-occurrence clustering analysis, providing a comprehensive overview of the current and future state of the field and its research directions. According to our findings, research from 2020 to 2025 accounts for nearly half of all research. China has the most publications, the United States is the primary center in the co-authorship network map of countries, DOE is the institute with the most publications, IEEE is the highest volume publisher, and seven clusters were identified in the cluster analysis performed on keywords.