Formation and Reactivity of Cu Particles on the Surface of Mixed Copper-Zirconium Phosphate

Abstract:

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.

• Periodical: Key Engineering Materials (Volume 670)
• Pages: 76-81
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.670.76
• Online since: October 2015
• Authors: Nataliya V. Dorofeeva*, Olga V. Vodyankina, Grigory V. Mamontov, Vladimir I. Zaykovskii
• Keywords: Copper, TPR-Co, TPR-H₂, Zirconium Phosphate

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