Physicochemical properties of cubic Ni complex powders synthesized using urotropine chelating ligand for solid oxide fuel cells
- Physicochemical properties of cubic Ni complex powders synthesized using urotropine chelating ligand for solid oxide fuel cells
- 강미숙; 김지은; 최병현[최병현]
- Issue Date
- ELSEVIER SCIENCE BV
- ADVANCED POWDER TECHNOLOGY, v.25, no.2, pp.609 - 614
- New nanometer nickel-based solid oxide fuel cell (SOFC) anode material has been synthesized by a hydrothermal reaction with nickel (II) chloride as a metal-containing precursor and a tetra dentate chelating reagent, urotropine. SEM images reveal that the Ni complexes change from two-dimensional flower-like stacked sheets to truncated cubes with increasing mol concentration of urotropine chelating additive. The truncated cubes show sizes of 50.0-200.0 nm. The electrical conductivity of the truncated cubic Ni complex (60.0 wt.%)-loaded commercial YSZ (40.0 wt.%) for an application in SOFC anode is superior compared to that of commercial. NiO/YSZ at the same composition. The zeta-potential value in aqueous solution determined by electrophoretic light scattering (ELS) show a positive surface charge in the range of pH 3.0-9.0, related to the surface stability, but it changes to a negative value at above pH >9. The H-2-temperature-programmed reduction experiments confirm that the truncated cubic Ni complex-loaded commercial YSZ shows a better reducibility than the commercial NiO/YSZ. (C) 2013 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
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