Journal
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
Volume 71, Issue 1, Pages 109-117Publisher
SPRINGER
DOI: 10.1007/s10971-014-3338-0
Keywords
Carbon gel; Carbon-nickel-palladium composite; TGA-DSC; SEM-EDS; Nitrogen adsorption; XRD; Cyclic voltammetry; Electrochemical hydrogen storage
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Funding
- [31-239/2012 DS-PB]
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Resorcinol-formaldehyde (RF) hydrogel and RF-nickel-palladium (RF-Ni-Pd) hydrogel were synthesized by sol-gel polycondensation followed by ambient drying. Carbon gel and carbon-nickel-palladium doped gels were prepared by carbonizing the RF and RF-Ni-Pd gels at 900 A degrees C under a nitrogen atmosphere. The goal of this study was to determine the effect of oxidative thermal treatment on the electrochemical activity of nickel-palladium doped carbon gels (C-Ni-Pd). The scanning electron microscopy analysis, adsorption and X-ray diffraction measurements showed that the admixture of Ni and Pd to carbon matrix resulted in the modification of morphological, porous and crystalline features. It has been demonstrated that composite C-Ni-Pd composed of sphere-like granules incrusted with well-crystalline nickel and palladium particles exhibits electrochemical activity in 6 M KOH aqueous solution. Thermal treatment of the composite carried out in air at 450 A degrees C brought about the improvement of electrochemical activity in the potential range of the hydrogen sorption/desorption reaction.
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