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Superior catalytic activity and stability for the methanol oxidation reaction of a direct methanol-air fuel cell is achieved with "clean" ultrathin CuPt 3 wavy nanowires. The nanowires are synthesized for the first time by functionalizing CuPt 3 nanoparticles with amine-terminated poly( N -isopropylacrylamide), a thermosensitive "smart" polymer having a phase transition at a liquid-electrolyte T  t (low critical solution temperature, 35 °C). Interestingly, retention of the functionalizing smart polymer on the surface of the nanowires reversibly switches the catalytic activity to lower rates above the T  t . The catalytic performance of the "clean" CuPt 3 nanowires is shown to be significantly improved over that of commercial Pt black catalyst, owing to their unique structural advantages and bimetallic synergetic effect.

Catalytic activities for methanol oxidation on ultrathin CuPt3 wavy nanowires with/without smart polymer

Catalytic activities for methanol oxidation on ultrathin CuPt₃ wavy nanowires with/without smart polymer