Promoting methanol oxidation reaction by loading PtNi nano catalysts on natural graphitic nano carbon

Nano-PtNi (atomic molar ratio Pt/Ni = 1/1) was directly grown, with a one-pot wet-chemical synthesis method, on a novel “natural graphitic-nano-carbon” (NC) for catalyzing the methanol-oxidation-reaction (MOR) in direct methanol fuel cells (DMFC). Comparative examination of PtNi/NC, nano-PtNi grown on commercial conductive carbon black, nano-PtNi with no carrier, and the common “commercial Pt/C” bench-mark, plus those relevant prior arts in the literature, show the excellence of PtNi/NC in mass activity, specific activity and onset potential for MOR. In addition, the morphologic, electronic structures and elemental analysis of these catalysts revealed by electron microscopy, X-ray diffraction, Raman spectrometer, X-ray photoelectron spectroscopy, inductively coupled plasma mass spectrometry and ultraviolet photoemission spectroscopy scientifically explain the observed superiority of PtNi/NC and the critical …