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Issue 29, 2012
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Catalytic dissolution of ceria under mild conditions

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The dissolution of ceria is studied through a catalytic reduction process involving platinum nanoparticles in mild conditions at near ambient temperature. The deposition of platinum nanoparticles is made by sonication (Ar, 18 W cm−2, 20 kHz), and further dissolution is studied as a function of different parameters such as stirring, sonication, dissolution media and temperature. The dissolution is evaluated using UV-vis spectrophotometry, ICP-AES, and SEM. The quantitative dissolution of ceria can be performed in HNO3–HCOOH–[N2H5][NO3], HNO3–[N2H5][NO3] or H2SO4–HCOOH mixtures at 40 °C. Nevertheless, it is shown that the combined use of ultrasound with nitric media in the presence of platinum nanoparticles can lead to passivating phenomena resulting in a decrease of the dissolution rate.

Graphical abstract: Catalytic dissolution of ceria under mild conditions

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Publication details

The article was received on 30 Mar 2012, accepted on 25 May 2012 and first published on 28 May 2012

Article type: Paper
DOI: 10.1039/C2JM31996A
Citation: J. Mater. Chem., 2012,22, 14734-14740

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    Catalytic dissolution of ceria under mild conditions

    M. Virot, T. Chave, D. Horlait, N. Clavier, N. Dacheux, J. Ravaux and S. I. Nikitenko, J. Mater. Chem., 2012, 22, 14734
    DOI: 10.1039/C2JM31996A

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