Understanding crystallization processes of NiO/Ce0.9Gd0.1O2-delta sol-gel processed thin films for the design of efficient electrodes: an in situ thermal ellipsometry analysis

作者：Mueller Guillaume; Boissiere Cedric; Grosso David; Ringuede Armelle; Laberty Robert Christel^*; Sanchez Clement

来源：Journal of Materials Chemistry, 2012, 22(18): 9368-9373.

DOI：10.1039/c2jm16550c

We describe a simple, non-destructive method, in situ thermal ellipsometry analysis (TEA), for understanding the different processes (decomposition of organics, crystallization, and sintering) occurring upon heating hybrid organic-inorganic films. According to these studies, a thermal treatment was tailored in order to obtain robust, nanocrystalline inorganic mesoporous 100-150 nm thick films with efficiently connected porosity surrounded by a crystalline inorganic network. Polymodal porous, nanocrystalline NiO/Gd-doped Ceria composites or Ni/Gd-doped Ceria films, interconnected network of open pores ranging from macro- to micro-pores, have been synthesized. The inorganic network is built from connected crystalline nanoparticles with mean diameters of 12 +/- 3 nm, whose small size is still preserved even at 800 degrees C. We also show that the thermal ellipsometry analysis is readily extendable to MO/Gd-doped Ceria with M - Cu, Ni, Co, etc., therefore demonstrating the interest of this technique in understanding thermal phenomena in complex ceramic and composite systems. This is trivial for designing electrodes with efficient microstructure.

• 出版日期2012