中央研究院 原子與分子科學研究所

A facile synthesis routefor preparation of highly N-dopedordered mesoporous carbons(NOMCs) containing well-dispersed,highly stable Pt nanoparticles(NPs) has been developed. These mesostructured Pt-NOMC materials invokes pyrolysis of co-fed carbon sources and Pt precursorsin amine-functionalized mesoporous SBA-15 silicas, which served simultaneously as the N source and hard template. It was found that the dispersion of Pt NPs increaseswith increasing N content in the Pt-NOMC electrocatalysts.The superior electrocatalytic activities during oxygen reduction reaction (ORR) and methanol-tolerant stabilitiesobserved for these novel Pt-NOMCmaterialshave been attributed to the dispersion and unique nanostructure of Pt NPs particularly in the presence of pyridinic-Natoms in the mesoporous carbon supports. The Pt-NOMC nanocompositesso fabricated should render future practical and cost-effective applications in proton exchange membrane fuel cells (PEMFCs) and direct methanol fuel cells (DMFCs).