Hydrogen-burning internal combustion engines have emerged as a promising solution in the fight against climate change due to their power without emitting carbon. However, these engines still release nitrogen oxides during the combustion process, leading to harmful ozone and particulate matter. UC Riverside scientists have made a breakthrough by utilizing a low-cost method to enhance catalytic converters in hydrogen engines. By infusing platinum with Y zeolites, they significantly improve the conversion of nitrogen oxides into harmless gases and water vapor, thereby reducing pollution levels. The innovative catalyst system demonstrated a four to five times increase in conversion efficiency at lower temperatures, essential for minimizing pollution during engine startup. Moreover, this technology can also be applied to diesel engines with hydrogen injection systems, providing a cleaner alternative for heavy-duty vehicles and generators. The research team collaborated with BASF for potential commercialization, with a pending patent signaling a step towards implementing sustainable transportation solutions. The simple yet effective approach of combining platinum and zeolite materials showcases a promising strategy for reducing nitrogen oxide emissions and advancing eco-friendly technologies.