1. Lanthanum cobaltite perovskite supported onto mesoporous zirconium dioxide: nature of active sites of VOC oxidation.
- Author
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Kustov AL, Tkachenko OP, Kustov LM, and Romanovsky BV
- Subjects
- Air Pollution prevention & control, Catalysis, Methanol chemistry, Nanoparticles chemistry, Oxidation-Reduction, Porosity, Temperature, Air Pollutants chemistry, Calcium Compounds chemistry, Lanthanum chemistry, Minerals chemistry, Oxides chemistry, Titanium chemistry, Volatile Organic Compounds chemistry, Zirconium chemistry
- Abstract
Novel catalytic nano-sized materials based on LaCoO(x) perovskite nanoparticles incapsulated in the mesoporous matrix of zirconia were prepared, characterized by physicochemical methods and tested in complete methanol oxidation. LaCoO(x) nanoparticles were prepared inside the mesopores of ZrO(2) by decomposition of bimetallic La-Co glycine precursor complexes. The catalysts have been studied by diffuse-reflectance FTIR-spectroscopy using such probe molecules as CO, CD(3)CN and CDCl(3) to test low-coordinated metal ions. At low temperatures of decomposition of complexes (up to 400°C), low-coordinated Co(3+) ions predominate in the LaCoO(x) nanoparticles, whereas basically Co(2+) ions are found upon increasing the decomposition temperature to 600°C. The novel nano-sized perovskite catalysts exhibit a very high catalytic activity in the abatement of volatile organic compounds present in air, like methanol and light hydrocarbons., (Copyright © 2011 Elsevier Ltd. All rights reserved.)
- Published
- 2011
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