TY - JOUR

T1 - Ni-Ru-containing mixed oxide-based composites as precursors for ethanol steam reforming catalysts

T2 - Effect of the synthesis methods on the structural and catalytic properties

AU - Naurzkulova, Symbat Muratbekovna

AU - Arapova, Marina Vasilievna

AU - Ishchenko, Arcady Vladimirovich

AU - Krieger, Tamara Andreevna

AU - Saraev, Andrei Aleksandrovich

AU - Kaichev, Vasilii Vasilievich

AU - Rogov, Vladimir Alekseevich

AU - Krasnov, Aleksei Vyacheslavovich

AU - Massalimova, Bakytgul Kabykenovna

AU - Sadykov, Vladislav Aleksandrovich

N1 - Funding Information: Funding information: This work was supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental order for Boreskov Institute of Catalysis project 0239-2021-0005 as well as by M. Kh. Dulaty Taraz Regional University, Taraz, Kazakhstan. Publisher Copyright: © 2021 De Gruyter. All rights reserved. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/1/1

Y1 - 2021/1/1

N2 - Ethanol steam reforming catalyst's precursors, i.e., nanocomposites of complex oxides with the general formula [Pr0.15Sm0.15Ce0.35Zr0.35O2 + LaMn0.45Ni0.45Ru0.1O3] (1:1 by mass), were synthesized by three different methods. It was shown that two synthesis methods - ultrasonic dispersion and sequential polymeric method, lead to the formation of the nanocomposite perovskite-fluorite system with the specific surface area up to 50 m2/g. Reduction of samples at 400-500°C lead to the formation of Ni-Ru alloy nanoparticles strongly bound with the surface of oxide nanocomposite. Catalytic tests in ethanol steam reforming reaction at 500-600°C showed the highest specific activity of the sample prepared by the sequential polymeric method due to the location of Ni- and Ru-containing perovskite mainly on the surface of the composite providing a high concentration of active metal centers. At higher temperatures for all samples, ethanol conversion approached 100% with hydrogen yield varying in the range of 65-75%. A study of spent catalysts confirmed the absence of carbon deposits after long-term catalytic tests at 650°C.

AB - Ethanol steam reforming catalyst's precursors, i.e., nanocomposites of complex oxides with the general formula [Pr0.15Sm0.15Ce0.35Zr0.35O2 + LaMn0.45Ni0.45Ru0.1O3] (1:1 by mass), were synthesized by three different methods. It was shown that two synthesis methods - ultrasonic dispersion and sequential polymeric method, lead to the formation of the nanocomposite perovskite-fluorite system with the specific surface area up to 50 m2/g. Reduction of samples at 400-500°C lead to the formation of Ni-Ru alloy nanoparticles strongly bound with the surface of oxide nanocomposite. Catalytic tests in ethanol steam reforming reaction at 500-600°C showed the highest specific activity of the sample prepared by the sequential polymeric method due to the location of Ni- and Ru-containing perovskite mainly on the surface of the composite providing a high concentration of active metal centers. At higher temperatures for all samples, ethanol conversion approached 100% with hydrogen yield varying in the range of 65-75%. A study of spent catalysts confirmed the absence of carbon deposits after long-term catalytic tests at 650°C.

KW - Ethanol

KW - Fluorite

KW - Hydrogen

KW - Perovskite

KW - Reforming

UR - http://www.scopus.com/inward/record.url?scp=85108699957&partnerID=8YFLogxK

U2 - 10.1515/chem-2021-0062

DO - 10.1515/chem-2021-0062

M3 - Article

AN - SCOPUS:85108699957

VL - 19

SP - 696

EP - 708

JO - Open Chemistry

JF - Open Chemistry

SN - 2391-5420

IS - 1

ER -