TY - JOUR

T1 - Mechanistic Study of Selective Oxidation of Methanol over a Monolayer V2O5/CeO2 Catalyst

AU - Litvintseva, Kseniya A.

AU - Chesalov, Yuriy A.

AU - Selivanova, Aleksandra V.

AU - Saraev, Andrey A.

AU - Kaichev, Vasily V.

N1 - This work was supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental assignment for Boreskov Institute of Catalysis (project FWUR-2024-0032). The experiments were performed using facilities of the shared research center “National center of investigation of catalysts” at Boreskov Institute of Catalysis. The authors thank Yu.E. Fedorova for the preparation of CeO and O.A. Bulavchenko for the XRD study. 2

PY - 2024/2/29

Y1 - 2024/2/29

N2 - An operando Fourier transform infrared spectroscopy (FTIRS) study of the oxidation of methanol over a monolayer V2O5/CeO2 catalyst was carried out at atmospheric pressure in a temperature range of 150-300 °C. It was found that the oxidation starts at 200 °C, when the main products─methyl formate and dimethoxymethane─are formed with a selectivity of 62 and 38%, respectively. An increase in the reaction temperature initiates the formation of formaldehyde, CO, and CO2, and at 300 °C, CO becomes the main reaction product. The main reaction intermediates are methoxy groups, formates, dioxymethylene species, and adsorbed formaldehyde. According to X-ray photoelectron spectroscopy (XPS) studies, the reaction involves a reversible reduction of V5+ and Ce4+ cations, indicating that both vanadia and ceria are involved in the oxidation of methanol. A reaction mechanism of the oxidation of methanol over supported vanadium oxide catalysts is discussed.

AB - An operando Fourier transform infrared spectroscopy (FTIRS) study of the oxidation of methanol over a monolayer V2O5/CeO2 catalyst was carried out at atmospheric pressure in a temperature range of 150-300 °C. It was found that the oxidation starts at 200 °C, when the main products─methyl formate and dimethoxymethane─are formed with a selectivity of 62 and 38%, respectively. An increase in the reaction temperature initiates the formation of formaldehyde, CO, and CO2, and at 300 °C, CO becomes the main reaction product. The main reaction intermediates are methoxy groups, formates, dioxymethylene species, and adsorbed formaldehyde. According to X-ray photoelectron spectroscopy (XPS) studies, the reaction involves a reversible reduction of V5+ and Ce4+ cations, indicating that both vanadia and ceria are involved in the oxidation of methanol. A reaction mechanism of the oxidation of methanol over supported vanadium oxide catalysts is discussed.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85186068006&origin=inward&txGid=b1e052419c2c3fe07bbc561c76a0976e

UR - https://www.mendeley.com/catalogue/15e3cef9-6623-313c-94a4-a30b7d15d214/

U2 - 10.1021/acs.jpcc.3c07378

DO - 10.1021/acs.jpcc.3c07378

M3 - Article

VL - 128

SP - 3193

EP - 3203

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 8

ER -