Inorganics, Volume 8, Issue 12 (December 2020) – 6 articles
Cover Story (view full-size image): CaTiO3, SrTiO3, and BaTiO3 films of 1 nm were deposited onto MgAl2O4 via atomic layer deposition and studied as catalyst supports for Ni. Scanning transmission electron microscopy demonstrated that both the Ni and the perovskites uniformly covered the surface of the support upon oxidation, but Ni particles formed following a reduction at 1073 K. When compared to Ni/MgAl2O4, the perovskite-containing catalysts required higher temperatures for Ni reduction. Equilibrium constants for Ni oxidation determined from coulometric titration indicated that the oxidation of Ni shifted to lower PO2 on the perovskite-containing materials. Based on Ni equilibrium constants, Ni interactions are strongest with CaTiO3, followed by SrTiO3 and BaTiO3. View this paper
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