Well-dispersed Pd3Pt1 alloy nanoparticles in large pore sized mesocellular carbon foam for improved methanol-tolerant oxygen reduction reaction
作者： Sunhyung An , Jung-Hyun Park , Chae-Ho Shin , Jin Joo , Easwaramoorthi Ramasamy
DOI: 10.1016/J.CARBON.2010.11.016
关键词: Chemical engineering 、 Nanotechnology 、 Materials science 、 Dielectric spectroscopy 、 Nanoparticle 、 Particle size 、 Catalysis 、 Carbon 、 Dispersion (chemistry) 、 Carbon nanofoam 、 Methanol
摘要: Abstract Oxygen reduction reaction (ORR) catalysts, Pd3Pt1 nanoparticles with methanol tolerance, are supported on various carbon supports: mesocellular foam (MSU-F-C), CMK-3, and Vulcan XC-72. The particle size of (∼5 nm) is larger than the pore CMK-3 (∼3 nm), resulting in agglomeration external surface CMK-3. large area MSU-F-C allows a high degree dispersion inside pores. Due to its highly dispersed state, Pd3Pt1/MSU-F-C shows higher ORR activity Pd3Pt1/Vulcan XC-72 Pd3Pt1/CMK-3. charge transfer resistance (Rct), as measured by electrochemical impedance spectroscopy, increases order Pd3Pt1/CMK-3 > Pd3Pt1/Vulcan XC-72 > Pd3Pt1/MSU-F-C. tolerant at 400 rpm presence 0.5 M CH3OH, while oxidation peaks observed case
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