Chunjing Li, Wenwen Guo, Jingqiang Wang
ABSTRACT In pursuit of global carbon neutrality, maritime shipping with high CO 2 emissions confronts an urgent imperative deep decarbonization. Green hydrogen is a zero‐carbon fuel produced through water electrolysis by renewable energy sources, which is emerging as a promising solution for maritime decarbonization owing to its high energy density and versatile application potential. Here, it provides a systematic overview of the technological feasibility of green hydrogen for maritime shipping, encompassing its current application status and key challenges. It analyzes recent advances in green hydrogen production, storage, transportation, and infrastructure development, while exploring the enabling roles of policy support, technological innovation, and international collaboration. Despite facing substantial barriers in cost, technology, and infrastructure, green hydrogen boasts enormous decarbonization potential and occupies an indispensable strategic position in the global carbon neutrality agenda.