TY - JOUR
T1 - Preparation of ordered mesoporous carbons containing well-dispersed and highly alloying Pt-Co bimetallic nanoparticles toward methanol-resistant oxygen reduction reaction
AU - Liu, Shou Heng
AU - Zheng, Feng Sheng
AU - Wu, Jyun Ren
PY - 2011/10/11
Y1 - 2011/10/11
N2 - A simple route is described for the synthesis of well-dispersed and highly alloying PtCo bifunctional nanoparticles supported on ordered mesoporous carbons (Pt100-xCox/OMC) by the simultaneous pyrolysis of carbon and metal precursors in a mesoporous silica as the hard template. A variety of different spectroscopic and analytical techniques was used to thoroughly characterize the Pt100-xCox/OMC samples. By X-ray diffraction, N2 adsorption/desorption isotherms and transmission electron microscopy, it was found that Pt100-xCox/OMC possessed well-dispersed Pt/PtCo nanoparticles (2-3nm) supported on high surface area (~1000m2g-1) and regular pore channels (~2.8nm). Among Pt100-xCox/OMC catalysts, the Pt50Co50/OMC was found to have superior electrocatalytic activity and the tolerance to methanol crossover during oxygen reduction reaction as compared to typical commercial electrocatalysts. This may be attributed to the dispersion and unique nanostructure of highly alloyed PtCo nanoparticles supported on Pt50Co50/OMC evidenced by X-ray absorption spectroscopy.
AB - A simple route is described for the synthesis of well-dispersed and highly alloying PtCo bifunctional nanoparticles supported on ordered mesoporous carbons (Pt100-xCox/OMC) by the simultaneous pyrolysis of carbon and metal precursors in a mesoporous silica as the hard template. A variety of different spectroscopic and analytical techniques was used to thoroughly characterize the Pt100-xCox/OMC samples. By X-ray diffraction, N2 adsorption/desorption isotherms and transmission electron microscopy, it was found that Pt100-xCox/OMC possessed well-dispersed Pt/PtCo nanoparticles (2-3nm) supported on high surface area (~1000m2g-1) and regular pore channels (~2.8nm). Among Pt100-xCox/OMC catalysts, the Pt50Co50/OMC was found to have superior electrocatalytic activity and the tolerance to methanol crossover during oxygen reduction reaction as compared to typical commercial electrocatalysts. This may be attributed to the dispersion and unique nanostructure of highly alloyed PtCo nanoparticles supported on Pt50Co50/OMC evidenced by X-ray absorption spectroscopy.
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U2 - 10.1016/j.apcatb.2011.08.011
DO - 10.1016/j.apcatb.2011.08.011
M3 - Article
AN - SCOPUS:80053104747
VL - 108-109
SP - 81
EP - 89
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
SN - 0926-3373
ER -