Size-Controlled Synthesis and Microstructure Investigation of Co3O4 
Nanoparticles for Low Temperature CO Oxidation

Dangwal Pandey, Arti; Jia, Chunjiang; Schmidt, Wolfgang; Leoni, Matteo; Schwickardi, Manfred; Schüth, Ferdi; Weidenthaler, Claudia

doi:10.1021/jp306166g

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Size-Controlled Synthesis and Microstructure Investigation of Co₃O₄ Nanoparticles for Low Temperature CO Oxidation

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Dangwal Pandey, Arti
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Jia, Chunjiang
Research Group Rinaldi, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Schmidt, Wolfgang
Research Group Schmidt, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Schwickardi, Manfred
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Schüth, Ferdi
Research Department Schüth, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Weidenthaler, Claudia
Research Group Weidenthaler, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Dangwal Pandey, A., Jia, C., Schmidt, W., Leoni, M., Schwickardi, M., Schüth, F., et al. (2012). Size-Controlled Synthesis and Microstructure Investigation of Co₃O₄ Nanoparticles for Low Temperature CO Oxidation. The Journal of Physical Chemistry C, 116(36), 19405-19412. doi:10.1021/jp306166g.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000E-746C-8

Abstract

Noble-metal-free functional oxides are active catalysts for CO oxidation at low temperatures. Spinel-type cobalt oxide (Co₃O₄) nanoparticles can be easily synthesized by impregnation of activated carbon with concentrated cobalt nitrate and successive carbon burn off. Mean size and particle size distribution can be tuned by adding small amounts of silica to the carbon precursor, as witnessed by whole powder pattern modeling of the X-ray powder diffraction data. The catalytic tests performed after silica removal show a significant influence of the mean domain size and of size distribution on the CO oxidation activity of the individual Co₃O₄ specimens, whereas defects play a less important role in the present case.