Formation and reactivity of Cu particles on the surface of mixed copper-zirconium phosphate N. V. Dorofeeva, O. V. Vodyankina, G. V. Mamontov, V. I. Zaykovskii
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ArticleSubject(s): медь | фосфаты циркония | фосфаты медиGenre/Form: статьи в журналах Online resources: Click here to access online
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Key engineering materials Vol. 670. P. 76-81Abstract: Phase evolution of copper-containing zirconium phosphates during the temperature treatment up to 900 °C and formation of active Cu0 particles on the surface of these materials in H2/Ar flow were studied. The materials were characterized by XRD, TEM, TPR-H2 at different steps of treatment. Temperature increase up to 900 °C led to removal of oxygen from the CuZr4P6O24 structure with formation of Cu+-containing compounds. Materials treated by H2-containing flow at 600 °C contained Cu0 particles with sizes from 2 nm to 1 μm. Mixed copper-zirconium phosphate was shown to adsorb CO above 80 °C, while pre-reduced materials adsorbed it starting from 30 °C with formation of CO2 above 100 °C.
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Phase evolution of copper-containing zirconium phosphates during the temperature treatment up to 900 °C and formation of active Cu0 particles on the surface of these materials in H2/Ar flow were studied. The materials were characterized by XRD, TEM, TPR-H2 at different steps of treatment. Temperature increase up to 900 °C led to removal of oxygen from the CuZr4P6O24 structure with formation of Cu+-containing compounds. Materials treated by H2-containing flow at 600 °C contained Cu0 particles with sizes from 2 nm to 1 μm. Mixed copper-zirconium phosphate was shown to adsorb CO above 80 °C, while pre-reduced materials adsorbed it starting from 30 °C with formation of CO2 above 100 °C.
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