<p>Graphitic carbon nitride (g-C₃N₄) possesses distinctive physicochemical properties, such as an adjustable electronic structure, exceptional chemical and thermal stability, and ease of manufacture in low-temperature fuel cell applications. This research aims to investigate the diverse functions of g-C₃N₄ in a variety of low-temperature fuel cell processes. It has the potential to address the persistent issues with conventional materials, such as their lack of activity, poor durability, and excessive cost, whether it is employed as a membrane adjuvant, co-catalyst, or a catalyst support. g-C₃N₄ is a desirable alternative for optimizing fuel cell performance due to its nitrogen-rich structure. Research has also shown that elemental doping, particularly with phosphorus, sulfur, and transition metals, substantially enhances critical performance factors such as power density, electrochemical stability, and resistance to fuel crossover. The worldwide progression of sustainable energy aligns with these trends, especially via the United Nations' Sustainable Development Goals (SDGs), notably SDG 7 (affordable and clean energy) and SDG 13 (climate action). However, additional research is necessary to optimize the synthesis of g-C₃N₄ for practical and commercial applications and to clarify its fundamental catalytic processes, despite the optimistic nature of these prospective findings. This paper critically evaluates the integration of g-C₃N₄ in next-generation low-temperature fuel cell technologies, including recent developments, current limitations, and prospective future prospects.</p>