Найдено научных статей и публикаций: 1, для научной тематики: Transmission electron microscope
1.
M.Nagarajan, G.Paruthimal Kalaignan and G.A.Pathanjali,
- International journal of hydrogen energy , 2013
Nano-structured PteWO3/C, PteWO3eTiO2/C and Pt/C catalysts are synthesized by
chemical reduction method using sodium borohydride as reducing agent. The catalysts
thus prepared are characterized and compared with commercial Pt/C catalyst. The
electrochemical performances are characterized by single c...
Nano-structured PteWO3/C, PteWO3eTiO2/C and Pt/C catalysts are synthesized by
chemical reduction method using sodium borohydride as reducing agent. The catalysts
thus prepared are characterized and compared with commercial Pt/C catalyst. The
electrochemical performances are characterized by single cell test evaluation, long term
stability test and cyclic voltammetry measurement. The chemical compositions, physical
and morphological characterizations are investigated by various techniques such X-ray
diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive X-ray
spectroscopy (EDX) and transmission electron microscopy (TEM). XRD analysis shows
that, all prepared catalysts exhibited face-centered cubic structures. XRD results confirm
that, the PteWO3/C and PteWO3eTiO2/C catalysts are smaller in particle size and larger in
surface area calculated from line broadening. The amount of Pt reduced from1.76 mg cm
2 (10% Pt/C) to 1.056 mg cm2 and 0.704 mg cm2 in the case of PteWO3/C and
PteWO3eTiO2/C respectively. Both the tungstate and titanate based electrocatalysts have
exhibited higher performance in single cell tests than lone Pt catalysts.