LAUSR

We report a novel porous and high‐specific surface area carbon support material (C‐framework) for PEMFC by the salt‐recrystallization‐fixing HKUST‐1 template. We believe this will be a universal method to convert high‐temperature unstable MOF materials, such as HKUST‐1. NaCl crystals serve as completely closed nanoreactors, which facilitate graphitization and structure inheritance. Electrochemical evaluation showed that the C‐framework loaded with Pt nanoparticles exhibits high ORR activity and excellent electrochemical performance in acidic electrolytes. The PEMFC performance reached a maximum power density of 780 mW/cm2 under the H2/air testing condition in ultra‐low Pt loading (cathode 0.1 mg/cm2).