Hydrogen oxidation reactions in hydroxide exchange membrane fuel cells have slow kinetics. Switching from platinum group metal (PGM) electrocatalysts to those that are PGM-free is a challenging task as the latter are prone to oxidation. Now, stable and active nickel–molybdenum–niobium catalysts are introduced for this type of fuel cell.The hydrogen economy is becoming a reality, with many major governments in the world (including the United States, Europe, Japan, China and others) agreeing on the importance of transitioning away from fossil fuels, and publicly announcing their hydrogen-related roadmaps1,2. One of the applications of green and renewable hydrogen will be in transportation fuel cells, especially for heavy duty applications such as long-haul trucking, aviation, and shipping.
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