Toward Platinum Group Metal-Free Catalysts for Hydrogen/Air Proton-Exchange Membrane Fuel Cells: Catalyst activity in platinum-free substitute cathode and anode materials. - Jaouen, Frédéric; Jones, Deborah; Coutard, Nathan; Artero, Vincent; Strasser, Peter; Kucernak, Anthony (Johnson Matthey Technology Review, 2026)