Найдено научных статей и публикаций: 2, для научной тематики: Polymer electrolyte membrane fuel cell
1.
Nagarajan Muthuraman, Paruthimal Kalaignan Guruvaiah, Pathanjali Gnanabaskara Agneeswara
- Materials Chemistry and Physics , 2013
In the recent years, extensive research work is being carried out and reported on improving the performance
of catalysts for both anode and cathode of polymer electrolyte membrane fuel cell (PEMFC).
The single cell performance of carbon supported Pt–WO3 electrocatalysts with various compositions
(as...
In the recent years, extensive research work is being carried out and reported on improving the performance
of catalysts for both anode and cathode of polymer electrolyte membrane fuel cell (PEMFC).
The single cell performance of carbon supported Pt–WO3 electrocatalysts with various compositions
(as weight percentage Pt–W 2:8, 4:6, 6:4, 2:8) as anode material was investigated in polymer electrolyte
membrane fuel cell and compared to that of 10% Pt/C on the same carbon support and 10%
Pt/C (commercial) electrocatalyst. The physical and morphological characterization of the optimized
Pt–WO3, 10% Pt/C, 10% Pt/C (commercial) electrocatalysts were further investigated by X-ray diffraction
(XRD), cyclic voltammetry, and scanning electron microscopy (SEM) with EDX, transmission electron
microscopy (TEM) techniques. The performance of Pt–WO3/C (with a weight percentage of Pt–W 6:4) as
anode material was better than those of other compositions of Pt–WO3/C catalyst, 10% Pt/C and 10% Pt/C
(commercial). The amount of Pt was also reduced from 1.76 mg cm−2 to 1.046 mg cm−2 which exhibited
higher performance in single cell tests.
2.
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.