Mapping of Heterogeneous Catalyst Degradation in Polymer Electrolyte Fuel Cells. - Cheng, Lei; Khedekar, Kaustubh; Rezaei Talarposhti, Morteza; Perego, Andrea; Metzger, Michael; Kuppan, Saravanan; Stewart, Sarah; Atanassov, Plamen; Tamura, Nobumichi; Craig, Nathan; Zenyuk, Iryna V.; Johnston, Christina M. (Advanced Energy Materials, 2020)