Properties of the surface layer and catalytic activity of Ta2O5 with Pt or Pd additives in the oxidation of hydrogen |
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| Authors: | V. V. Lesnyak V. K. Yatsimirskii O. Yu. Boldyreva T. D. Kinder |
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| Affiliation: | (1) Taras Shevchenko Kyiv National University, Vul. Volodymyrs’ka, 64, Kyiv, 01033, Ukraine |
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| Abstract: | The catalytic activity in the oxidation of hydrogen (in the gaseous state in the presence of excess oxygen) has been studied for samples of Pt(Pd)/Ta2O5−x, formed by reduction with hydrogen. The samples obtained had greater activity than the traditional catalysts Pt(Pd)/Al2O3. According to X-ray diffraction analysis and electron microscopic studies, Ta2O5−x becomes amorphous with the formation of more reduced non-stoichiometric oxygen-deficient tantalum oxides with a surface layer of catalyst. __________ Translated from Teoreticheskaya i éksperimental’naya Khimiya, Vol. 44, No. 3, pp. 180–185, May–June, 2008. |
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| Keywords: | oxidation of H2 X-ray diffraction analysis electron microscopy non-stoichiometric tantalum oxides |
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