Abstract
The hydrogen sensing performance of ceria-containing nanocrystalline indium and tin oxides is investigated for different concentrations of added ceria. The sensor response of nanocrytsalline In2O3 is considerably enhanced at low CeO2 concentrations. In contrast, low levels of CeO2 cause a substantial drop in the sensor response of SnO2-based composite; at a 3 wt % level of added ceria, its hydrogen sensing ability is almost entirely suppressed. Possible causes of these effects are investigated via X-ray photoelectron spectroscopy (XPS) and X-ray diffraction. XPS data show that additions of CeO2 have different effects on the structure of the base oxides (In2O3 and SnO2), with implications for the hydrogen sensing performance of the composites.
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Original Russian Text © G.N. Gerasimov, V.F. Gromov, T.V. Belysheva, M.I. Ikim, E.Yu. Spiridonova, M.M. Grekhov, I.V. Shapochkina, V.I. Brynzar’, L.I. Trakhtenberg, 2017, published in Zhurnal Fizicheskoi Khimii, 2017, Vol. 91, No. 10, pp. 1765–1770.
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Gerasimov, G.N., Gromov, V.F., Belysheva, T.V. et al. Investigating the sensor response of ceria-containing binary metal oxide nanocomposites. Russ. J. Phys. Chem. 91, 1976–1980 (2017). https://doi.org/10.1134/S0036024417100120
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DOI: https://doi.org/10.1134/S0036024417100120