Mapping the Global Research Landscape of Green Hydrogen Technologies: A Comprehensive Scientometric Study

Abstract: Green hydrogen technology has emerged as a critical pathway for achieving carbon neutrality goals and has become a global research hotspot. However, systematic analysis of the research evolution trajectory and knowledge structure in this field remains insufficient. This study employs CiteSpace software to conduct scientometric analysis on 9,545 green hydrogen technology publications from the Web of Science database spanning 2010-2024, revealing the development dynamics from multiple dimensions including publication statistics, collaboration networks, co-citation relationships, and keyword co-occurrence patterns. The findings demonstrate explosive growth in green hydrogen technology research, with annual publications surging from 43 in 2010 to 3,267 in 2024, exhibiting significant interdisciplinary characteristics. Collaboration network analysis indicates that the Chinese Academy of Sciences, the United States, and Germany play pivotal roles in global cooperation, though the depth of international collaboration requires enhancement. Co-citation analysis reveals that the most frequently cited authors are not necessarily the most influential in network terms, while highly cited journals typically possess elevated academic impact factors. Keyword evolution analysis shows that research focus is shifting from fundamental theory toward electrocatalyst optimization, system integration, and industrial applications. Compared to previous studies, this work represents the first comprehensive construction of a panoramic knowledge framework for green hydrogen technology research. The study systematically analyzes collaboration patterns, knowledge foundations, and development trends in this field, identifies current challenges including imbalanced international cooperation and fragmented knowledge structures, and predicts future research directions such as electrocatalytic technology breakthroughs and systematic energy optimization. These findings provide scientific guidance for advancing both theoretical development and industrialization processes of green hydrogen technology.

摘要：绿氢技术（Green hydrogen technology）已成为实现碳中和目标的关键路径，亦成为全球研究热点。然而，当前学界对该领域的研究演进轨迹与知识结构的系统性分析仍存在不足。本研究依托Web of Science数据库2010-2024年间的9545篇绿氢技术相关文献，使用CiteSpace软件开展科学计量分析，从发文统计、合作网络、共引关系、关键词共现模式等多个维度揭示其发展动态。
研究结果显示，绿氢技术相关研究呈爆发式增长态势，年发文量从2010年的43篇飙升至2024年的3267篇，且表现出显著的跨学科特征。合作网络分析表明，中国科学院（Chinese Academy of Sciences）、美国与德国在全球合作中发挥着核心作用，但国际合作的深度仍有待提升。共引分析显示，被引频次最高的作者未必在网络中影响力最强，而高被引期刊通常拥有较高的学术影响因子。关键词演化分析表明，研究焦点正从基础理论向电催化剂（electrocatalyst）优化、系统集成与工业应用方向转移。
相较于以往研究，本工作首次全面构建了绿氢技术研究的全景式知识框架。本研究系统性分析了该领域的合作模式、知识基础与发展趋势，识别出当前存在的国际合作失衡、知识结构碎片化等挑战，并预测了电催化技术（electrocatalytic technology）突破、系统性能源优化等未来研究方向。上述研究结果可为绿氢技术的理论发展与工业化进程提供科学指导。