Competing strain effects in reactivity of LaCoO3 with oxygen

Orientation-dependent structural and photocatalytic properties of LaCoO3 epitaxial nano-thin films

LaCoO3 epitaxial films were grown on (100), (110) and (111) oriented LaAlO3 substrates by the polymer-assisted deposition method. Crystal structure measurement and cross-section observation indicate that all the LaCoO3 films are epitaxially grown in accordance with the orientation of LaAlO3 substrates, with biaxial compressive strain in the ab plane. Owing to the different strain directions of ...

Effects of Excess Cobalt Oxide Nanocrystallites on LaCoO3 Catalyst on Lowering the Light off Temperature of CO and Hydrocarbons Oxidation

Catalysts with the formula of LaCo(1+x)O(3+δ), where 0 ≤ x ≤ 1, were studied for oxidation of CO and C2H6 in a synthetic exhaust gas, comprising 6.0 % CO and 0.2 % C2H6 in Ar. Ethane was selected as a model for hydrocarbons in the exhaust gas. The performance of catalysts is correlated to their properties, particularly their ...

Studying Dynamics of Oxygen Vacancy Ordering in Epitaxial LaCoO3 / SrTiO3 Superlattice with Real-Time Observation

Oxygen vacancies in perovskite oxides are of great interest both from fundamental viewpoint due to their effect on electronic and magnetic properties of oxides – and from applications viewpoint due to their importance for solid oxide fuel cells. In the latter case, understanding the dynamic behavior of vacancies is crucial. Oxygen vacancy (Vo) ordering can substantially affect local structure a...

Ionic conductivity of perovskite LaCoO3 measured by oxygen permeation technique

Electronic Structure and Reactivity of TM-Doped La1-xSrxCoO3 (TM=Ni, Fe) Heterogeneous Catalysts

The catalytic properties of LaCoO3 in aqueous oxidation are explored as a function of doping. Both Sr substitution for La and Fe/Ni substitution for Co are studied. The reaction of interest is the aqueous epoxidation of crotyl alcohol with hydrogen peroxide. The reaction products are measured using GC, and the decomposition of hydrogen peroxide is studied using the volume of oxygen evolved duri...