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Pd–Cu/HOPG and Pd–Ag/HOPG Model Catalysts in CO and Methanol Oxidations at Submillibar Pressures

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Abstract

The regularities of formation of alloyed Pd–Cu bimetallic particles deposited on highly oriented pyrolytic graphite (HOPG) were studied by STM and synchrotron-radiation-based XPS. Their chemical composition, structure, and the ranges of thermal stability under ultrahigh vacuum were determined. The Pd–Cu/HOPG model catalysts, as well as the Pd–Ag/HOPG samples whose preparation procedure was tested earlier, exhibited catalytic activity in CO and methanol oxidations at pressures typical of in situ XPS experiments and were stable at the temperatures of the catalytic reaction.

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ACKNOWLEDGMENTS

We are grateful to the Russian-German Laboratory (RGBL) and the German-Russian Interdisciplinary Scientific Center (G-RISC) funded by the Federal Ministry of Foreign Affairs of Germany via the German Academic Exchange Service (DAAD).

Funding

This study was supported by the Russian Foundation for Basic Research (grant no. 17-03-01378) (reactivity studies of catalysts) and performed under the base budget funding project at Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences (АААА-А19-119020890025-3) (preparation and characterization of catalysts by STM and XPS, including SR).

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Authors and Affiliations

  1. Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, 630090, Novosibirsk, Russia

    M. A. Panafidin, A. V. Bukhtiyarov, I. P. Prosvirin, I. A. Chetyrin & V. I. Bukhtiyarov

  2. Fritz Haber Institute of the Max Planck Society, 14195, Berlin, Germany

    A. Yu. Klyushin

  3. Helmholtz Center for Materials and Energy, 12489, Berlin, Germany

    A. Yu. Klyushin

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  1. M. A. Panafidin
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  2. A. V. Bukhtiyarov
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  3. A. Yu. Klyushin
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  4. I. P. Prosvirin
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  5. I. A. Chetyrin
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  6. V. I. Bukhtiyarov
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Correspondence to A. V. Bukhtiyarov.

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Translated by L. Smolina

Abbreviations: STM—scanning tunneling microscopy; XPS—X-ray photoelectron spectroscopy; SR-XPS—synchrotron-radiaton-based XPS; HOPG—highly oriented pyrolytic graphite; BE— binding energy; m/z—mass/charge signals; PSD – particle size distribution.

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Panafidin, M.A., Bukhtiyarov, A.V., Klyushin, A.Y. et al. Pd–Cu/HOPG and Pd–Ag/HOPG Model Catalysts in CO and Methanol Oxidations at Submillibar Pressures. Kinet Catal 60, 832–841 (2019). https://doi.org/10.1134/S0023158419060107

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  • DOI: https://doi.org/10.1134/S0023158419060107

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