TY - JOUR

T1 - Sol-gel synthesis and investigation of catalysts on the basis of perovskite-type oxides GdMO3 (M= Fe, Co)

AU - Yafarova, L. V.

AU - Chislova, I. V.

AU - Zvereva, I. A.

AU - Kryuchkova, T. A.

AU - Kost, V. V.

AU - Sheshko, T. F.

N1 - Funding Information: This work was financially supported by the Russian Foundation for Basic Research (Projects No. 18-33-01209 and No. 17-03-00647). The publication has been prepared with the support of the ?RUDN University Program 5-100?. Research was performed at the Center for Thermogravimetric and Calorimetric Research, Interdisciplinary Center for Nanotechnology and Research Centre for X-ray Diffraction Studies of Research Park of St. Petersburg State University. Publisher Copyright: © 2019, Springer Science+Business Media, LLC, part of Springer Nature. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.

PY - 2019/11/1

Y1 - 2019/11/1

N2 - The perovskite-type oxides GdCoxFe1−xO3 (x = 0; 0.2; 0.5; 0.8; 1) synthesized by the sol–gel method were tested as catalysts in the dry reforming of methane to syngas between 500 and 950 °С at atmospheric pressure. Thermal analysis (TG and DSC coupled with MS) and phase analysis (X-ray diffraction) were used for the synthesis parameters control. The morphology and surface area were determined by BET and SEM methods. The highly crystalline, homogeneous and pure solids with well-defined structures were prepared. The mixed GdCoxFe1−xO3 (x = 0; 0.2; 0.5; 0.8; 1) structure belongs to an orthorhombic crystal system with a space group of Pnma (62). The partial substitution of Fe by Co leads to the increase of the catalytic activity. in the row: GdFeO3 < GdFe0.5Co0.5O3 < GdCoO3 ⩽ GdFe0.8Co0.2O3 ≈ GdFe0.2Co0.8O3. An additional point is that the presence of Co in B-site suppresses secondary reactions such as reverse water gas-shift without slowing the dry reforming reaction, which produces syngas in a ratio close to 1. [Figure not available: see fulltext.]

AB - The perovskite-type oxides GdCoxFe1−xO3 (x = 0; 0.2; 0.5; 0.8; 1) synthesized by the sol–gel method were tested as catalysts in the dry reforming of methane to syngas between 500 and 950 °С at atmospheric pressure. Thermal analysis (TG and DSC coupled with MS) and phase analysis (X-ray diffraction) were used for the synthesis parameters control. The morphology and surface area were determined by BET and SEM methods. The highly crystalline, homogeneous and pure solids with well-defined structures were prepared. The mixed GdCoxFe1−xO3 (x = 0; 0.2; 0.5; 0.8; 1) structure belongs to an orthorhombic crystal system with a space group of Pnma (62). The partial substitution of Fe by Co leads to the increase of the catalytic activity. in the row: GdFeO3 < GdFe0.5Co0.5O3 < GdCoO3 ⩽ GdFe0.8Co0.2O3 ≈ GdFe0.2Co0.8O3. An additional point is that the presence of Co in B-site suppresses secondary reactions such as reverse water gas-shift without slowing the dry reforming reaction, which produces syngas in a ratio close to 1. [Figure not available: see fulltext.]

KW - перовскит

KW - Катализатор

KW - Конверсия природного газа

UR - http://www.scopus.com/inward/record.url?scp=85065739277&partnerID=8YFLogxK

UR - https://www.proquest.com/openview/6c14fb2cd466ca9728a0e78ba539f1dd/1.pdf?pq-origsite=gscholar&cbl=2043844

U2 - 10.1007/s10971-019-05013-3

DO - 10.1007/s10971-019-05013-3

M3 - Article

AN - SCOPUS:85065739277

VL - 92

SP - 264

EP - 272

JO - Journal of Sol-Gel Science and Technology

JF - Journal of Sol-Gel Science and Technology

SN - 0928-0707

IS - 2

ER -