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Studying the States of Platinum in Deposited Heteropoly Compounds via Diffuse Reflection IR Spectroscopy

  • CHEMICAL KINETICS AND CATALYSIS
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Abstract

The effect redox treatments have on the state of platinum in systems KxH4−x[SiW11PtO39]/ZrO2–Al2O3 and KxH6−x[SiW11NiO39] + KxH4 – x[SiW11PtO39]/ZrO2–Al2O3 is studied using the DRIFTS method with CO as the probe molecule. It is found that platinum was in the Pt2+ and Pt+ states in the initial sample calcined at 400°C with deposited Pt–heteropoly compounds (HPCs). Platinum was in the Pt2+ and Pt0 states in the initial sample of Pt-HPC + Ni-HPC calcined with the deposited mixture at 400°C. A comparison of two samples shows that mixing Pt-HPC with Ni-HPC improves the thermal stability of the former in redox cycles at 300°C.

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Authors and Affiliations

  1. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, 119991, Moscow, Russia

    O. P. Tkachenko & L. M. Kustov

  2. Gubkin Russian State University Oil and Gas, 119991, Moscow, Russia

    R. A. Gazarov

  3. Department of Chemistry, Moscow State University, 119992, Moscow, Russia

    L. M. Kustov

Authors
  1. O. P. Tkachenko
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  2. R. A. Gazarov
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  3. L. M. Kustov
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Correspondence to L. M. Kustov.

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Tkachenko, O.P., Gazarov, R.A. & Kustov, L.M. Studying the States of Platinum in Deposited Heteropoly Compounds via Diffuse Reflection IR Spectroscopy. Russ. J. Phys. Chem. 95, 949–953 (2021). https://doi.org/10.1134/S0036024421050277

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  • DOI: https://doi.org/10.1134/S0036024421050277

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