Development of Conductive Oxide Coatings to Reduce the Use of PGMs in Bipolar Plates of PEM Electrolyzers Using HiPIMS - Christian Calero-Almeyda, Iván Fernández-Martínez, José Antonio Santiago, Maria de la Paz Cumia Espinosa de los Monteros, Yolanda Martin, Miguel Panizo-Laiz (2025)