Oxygen surface exchange kinetics of Ba0.5Sr0.5Co0.8Fe0.2O3−δ

V.A. Eremin; M.V. Ananyev; H.J.M. Bouwmeester; E.K. Kurumchin; Ch.-Y. Yoo

doi:10.1039/c9cp06650k

Oxygen surface exchange kinetics of Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δ

V.A. Eremin^*, M.V. Ananyev, H.J.M. Bouwmeester, E.K. Kurumchin, Ch.-Y. Yoo

^*Corresponding author for this work

Inorganic Membranes

Research output: Contribution to journal › Article › Academic › peer-review

6 Citations (Scopus)

10 Downloads (Pure)

Abstract

The mechanism of oxygen exchange between the gas phase and Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δoxide was evaluated by considering the inhomogeneity of the oxide surface. The applicability of existing models for the analysis of the oxygen exchange mechanism was considered. A new model with a dissociation step was suggested. The rate-determining steps of the oxygen exchange process were revealed under different experimental conditions. The change in the rate-determining step occurred at 600-650 °C. The probable cause was considered taking into account the parameter of nonequivalency of adsorption centers. A relationship between the oxygen isotope redistribution rates and the rates of the elementary steps in a “gas phase-solid oxide” system was revealed.

Original language	English
Pages (from-to)	10158-10169
Number of pages	12
Journal	Physical chemistry chemical physics
Volume	22
Issue number	18
DOIs	https://doi.org/10.1039/c9cp06650k
Publication status	Published - 14 May 2020

Keywords

n/a OA procedure

Access to Document

10.1039/c9cp06650k

Cite this

@article{9a0f9db76c1c4af9b9d554afc68ef115,

title = "Oxygen surface exchange kinetics of Ba0.5Sr0.5Co0.8Fe0.2O3−δ",

abstract = "The mechanism of oxygen exchange between the gas phase and Ba0.5Sr0.5Co0.8Fe0.2O3−δoxide was evaluated by considering the inhomogeneity of the oxide surface. The applicability of existing models for the analysis of the oxygen exchange mechanism was considered. A new model with a dissociation step was suggested. The rate-determining steps of the oxygen exchange process were revealed under different experimental conditions. The change in the rate-determining step occurred at 600-650 °C. The probable cause was considered taking into account the parameter of nonequivalency of adsorption centers. A relationship between the oxygen isotope redistribution rates and the rates of the elementary steps in a “gas phase-solid oxide” system was revealed.",

keywords = "n/a OA procedure",

author = "V.A. Eremin and M.V. Ananyev and H.J.M. Bouwmeester and E.K. Kurumchin and Ch.-Y. Yoo",

year = "2020",

month = may,

day = "14",

doi = "10.1039/c9cp06650k",

language = "English",

volume = "22",

pages = "10158--10169",

journal = "Physical chemistry chemical physics",

issn = "1463-9076",

publisher = "Royal Society of Chemistry",

number = "18",

}

TY - JOUR

T1 - Oxygen surface exchange kinetics of Ba0.5Sr0.5Co0.8Fe0.2O3−δ

AU - Eremin, V.A.

AU - Ananyev, M.V.

AU - Bouwmeester, H.J.M.

AU - Kurumchin, E.K.

AU - Yoo, Ch.-Y.

PY - 2020/5/14

Y1 - 2020/5/14

N2 - The mechanism of oxygen exchange between the gas phase and Ba0.5Sr0.5Co0.8Fe0.2O3−δoxide was evaluated by considering the inhomogeneity of the oxide surface. The applicability of existing models for the analysis of the oxygen exchange mechanism was considered. A new model with a dissociation step was suggested. The rate-determining steps of the oxygen exchange process were revealed under different experimental conditions. The change in the rate-determining step occurred at 600-650 °C. The probable cause was considered taking into account the parameter of nonequivalency of adsorption centers. A relationship between the oxygen isotope redistribution rates and the rates of the elementary steps in a “gas phase-solid oxide” system was revealed.

AB - The mechanism of oxygen exchange between the gas phase and Ba0.5Sr0.5Co0.8Fe0.2O3−δoxide was evaluated by considering the inhomogeneity of the oxide surface. The applicability of existing models for the analysis of the oxygen exchange mechanism was considered. A new model with a dissociation step was suggested. The rate-determining steps of the oxygen exchange process were revealed under different experimental conditions. The change in the rate-determining step occurred at 600-650 °C. The probable cause was considered taking into account the parameter of nonequivalency of adsorption centers. A relationship between the oxygen isotope redistribution rates and the rates of the elementary steps in a “gas phase-solid oxide” system was revealed.

KW - n/a OA procedure

UR - http://www.scopus.com/inward/record.url?scp=85084695419&partnerID=8YFLogxK

U2 - 10.1039/c9cp06650k

DO - 10.1039/c9cp06650k

M3 - Article

C2 - 32347221

AN - SCOPUS:85084695419

SN - 1463-9076

VL - 22

SP - 10158

EP - 10169

JO - Physical chemistry chemical physics

JF - Physical chemistry chemical physics

IS - 18

ER -

Oxygen surface exchange kinetics of Ba_0.5Sr_0.5Co_0.8Fe_0.2O_3−δ

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this