The Effect of Sibunit Carbon Surface Modification with Diazonium Tosylate Salts of Pd and Pd-Au Catalysts on Furfural Hydrogenation

Dmitrii German; Ekaterina Kolobova; Ekaterina Pakrieva; Sónia A C Carabineiro; Elizaveta Sviridova; Sergey Perevezentsev; Shahram Alijani; Alberto Villa; Laura Prati; Pavel Postnikov; Nina Bogdanchikova; Alexey Pestryakov

doi:10.3390/ma15134695

The Effect of Sibunit Carbon Surface Modification with Diazonium Tosylate Salts of Pd and Pd-Au Catalysts on Furfural Hydrogenation

Materials (Basel). 2022 Jul 4;15(13):4695. doi: 10.3390/ma15134695.

Authors

Affiliations

¹ Research School of Chemistry and Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Lenin Av. 30, 634050 Tomsk, Russia.
² Centro de Química Estrutural, Institute of Molecular Sciences, Departamento de Engenharia Química, Instituto Superior Técnico, Universidade de Lisboa, Av. Rovisco Pais, 1049-001 Lisboa, Portugal.
³ LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
⁴ Institute of Petroleum Chemistry, Russian Academy of Science, Akademichesky Av. 4, 634021 Tomsk, Russia.
⁵ Dipartimento di Chimica, Università degli Studi di Milano, via Camillo Golgi 19, 20133 Milano, Italy.
⁶ Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Ensenada 22800, Mexico.
⁷ Laboratory of Catalytic and Biomedical Technologies, Sevastopol State University, 299053 Sevastopol, Russia.

Abstract

Herein, we investigated the effect of the support modification (Sibunit carbon) with diazonium salts of Pd and Pd-Au catalysts on furfural hydrogenation under 5 bars of H₂ and 50 °C. To this end, the surface of Sibunit (Cp) was modified with butyl (Cp-Butyl), carboxyl (Cp-COOH) and amino groups (Cp-NH₂) using corresponding diazonium salts. The catalysts were synthesized by the sol immobilization method. The catalysts as well as the corresponding supports were characterized by Fourier transform infrared spectroscopy, N₂ adsorption-desorption, inductively coupled plasma atomic emission spectroscopy, high resolution transmission electron microscopy, energy dispersive spectroscopy, X-ray diffraction, Hammet indicator method and X-ray photoelectron spectroscopy. The analysis of the results allowed us to determine the crucial influence of surface chemistry on the catalytic behavior of the studied catalysts, especially regarding selectivity. At the same time, the structural, textural, electronic and acid-base properties of the catalysts were practically unaffected. Thus, it can be assumed that the modification of Sibunit with various functional groups leads to changes in the hydrophobic/hydrophilic and/or electrostatic properties of the surface, which influenced the selectivity of the process.

Keywords: Sibunit carbon; bimetallic catalysts; furfural; furfuryl alcohol; gold; hydrogenation; palladium; surface modification; tosylate salts.

Grants and funding

The research is funded by the Ministry of Education and Science of the Russian Federation Program № 075-03-2021-287/6, Sevastopol State University Research grant 42-01-09/169/2021-4 (Russia).