TY - JOUR

T1 - Structural insight into la0.5ca0.5mn0.5co0.5o3 decomposition in the methane combustion process

AU - Nikolaeva, Olga

AU - Kapishnikov, Aleksandr

AU - Gerasimov, Evgeny

N1 - Funding Information: This work was supported by the Russian Science Foundation, grant No. 18-73-00139. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/9

Y1 - 2021/9

N2 - Perovskite-like solid solution La0.5Ca0.5Mn0.5Co0.5O3 was tested during the total methane combustion reaction. During the reaction, there is a noticeable decrease in methane conversion, the rate of catalyst deactivation increasing with an increase in temperature. The in situ XRD and HRTEM methods show that the observed deactivation occurs as a result of the segregation of calcite and cobalt oxide particles on the perovskite surface. According to the TGA, the observed drop in catalytic activity is also associated with a large loss of oxygen from the perovskite structure.

AB - Perovskite-like solid solution La0.5Ca0.5Mn0.5Co0.5O3 was tested during the total methane combustion reaction. During the reaction, there is a noticeable decrease in methane conversion, the rate of catalyst deactivation increasing with an increase in temperature. The in situ XRD and HRTEM methods show that the observed deactivation occurs as a result of the segregation of calcite and cobalt oxide particles on the perovskite surface. According to the TGA, the observed drop in catalytic activity is also associated with a large loss of oxygen from the perovskite structure.

KW - In situ XRD

KW - Microstructure

KW - Perovskite

KW - Phase transformation

KW - Recrystallization

UR - http://www.scopus.com/inward/record.url?scp=85114103381&partnerID=8YFLogxK

U2 - 10.3390/nano11092283

DO - 10.3390/nano11092283

M3 - Article

C2 - 34578599

AN - SCOPUS:85114103381

VL - 11

JO - Nanomaterials

JF - Nanomaterials

SN - 2079-4991

IS - 9

M1 - 2283

ER -