Researchers at the Korea Institute of Science and Technology (KIST) have made a significant advancement in green hydrogen production by developing an oxidatively stable molybdenum-based MXene as a catalyst support for anion exchange membrane water electrolysers. This new material shows promise in lowering the cost of green hydrogen production by offering stability under oxidative high voltage conditions, making it suitable for the oxygen evolution reaction in electrolysis. Green hydrogen, which does not emit carbon emissions when used as an energy source, is becoming increasingly important in the global energy transition, with 137 countries committing to achieving zero carbon emissions by 2050. The article discusses the challenges in green hydrogen production, particularly the energy-intensive process of water electrolysis. Catalysts made of nanoscale particles are used to increase the efficiency of the reaction, but issues like agglomeration over time pose challenges. To address this, researchers have turned to MXenes, nanomaterials with electrically conductive properties and a 2D nanostructure, making them ideal for catalyst support. While titanium-based MXenes have high electrical conductivity, their tendency to oxidize in water limits their effectiveness. By designing a new catalyst using molybdenum-carbide-based MXene, researchers have significantly improved hydrogen production efficiency and durability, paving the way for cost reductions in green hydrogen production. The breakthrough with molybdenum-based MXene could have far-reaching impacts on large-scale hydrogen production plants and green hydrogen power stations. The material's enhanced durability and efficiency make it a promising candidate for future applications, contributing to a more sustainable and eco-friendly energy landscape.