Surface segregation in solid oxide electrode materials occurring at intermediate temperatures

J. Druce; H. Téllez; H. T. Ishihara; J. A. Kilner

doi:10.1149/06602.0061ecst

Surface segregation in solid oxide electrode materials occurring at intermediate temperatures

J. Druce, H. Téllez, H. T. Ishihara, J. A. Kilner

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

5 Citations (Scopus)

Abstract

The segregation of constituent elements and impurities affects the surface composition of solid oxide electrode materials, and hence, the rate of the surface exchange reaction. In this work, we compare segregation occurring at 400 °C in Pr0.5Sr0.5CoO3-d (PSCO) and PrBaCo2O5-d (PBCO). The surface composition changes rapidly on annealing at low temperature, with segregation of the divalent cation evident after just 15 minutes. The PBCO contained a Na impurity which undergoes similar segregation behavior to the Ba, becoming the dominant surface cation after 2 hours of annealing. Although cation mobility in these materials is slow compared to oxygen, it is sufficient to cause significant changes in surface composition on timescales of the order of hours.

Original language	English
Title of host publication	Solid-Gas Electrochemical Interfaces � SGEI 1
Editors	E. Ivers-Tiffee, M. B. Mogensen, S. B. Adler, T. Kawada
Publisher	Electrochemical Society Inc.
Pages	61-68
Number of pages	8
Edition	2
ISBN (Electronic)	9781607685395
DOIs	https://doi.org/10.1149/06602.0061ecst
Publication status	Published - 2015
Event	1st Symposium on Solid-Gas Electrochemical Interfaces, SGEI 2015 - 227th ECS Meeting - Chicago, United States Duration: May 24 2015 → May 28 2015

Publication series

Name	ECS Transactions
Number	2
Volume	66
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Other

Other	1st Symposium on Solid-Gas Electrochemical Interfaces, SGEI 2015 - 227th ECS Meeting
Country/Territory	United States
City	Chicago
Period	5/24/15 → 5/28/15

All Science Journal Classification (ASJC) codes

Engineering(all)

Access to Document

10.1149/06602.0061ecst

Cite this

Druce, J., Téllez, H., Ishihara, H. T., & Kilner, J. A. (2015). Surface segregation in solid oxide electrode materials occurring at intermediate temperatures. In E. Ivers-Tiffee, M. B. Mogensen, S. B. Adler, & T. Kawada (Eds.), Solid-Gas Electrochemical Interfaces � SGEI 1 (2 ed., pp. 61-68). (ECS Transactions; Vol. 66, No. 2). Electrochemical Society Inc.. https://doi.org/10.1149/06602.0061ecst

Surface segregation in solid oxide electrode materials occurring at intermediate temperatures. / Druce, J.; Téllez, H.; Ishihara, H. T. et al.
Solid-Gas Electrochemical Interfaces � SGEI 1. ed. / E. Ivers-Tiffee; M. B. Mogensen; S. B. Adler; T. Kawada. 2. ed. Electrochemical Society Inc., 2015. p. 61-68 (ECS Transactions; Vol. 66, No. 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Druce, J, Téllez, H, Ishihara, HT & Kilner, JA 2015, Surface segregation in solid oxide electrode materials occurring at intermediate temperatures. in E Ivers-Tiffee, MB Mogensen, SB Adler & T Kawada (eds), Solid-Gas Electrochemical Interfaces � SGEI 1. 2 edn, ECS Transactions, no. 2, vol. 66, Electrochemical Society Inc., pp. 61-68, 1st Symposium on Solid-Gas Electrochemical Interfaces, SGEI 2015 - 227th ECS Meeting, Chicago, United States, 5/24/15. https://doi.org/10.1149/06602.0061ecst

@inproceedings{9f781a824e79412f9251a9dd6d69931a,

title = "Surface segregation in solid oxide electrode materials occurring at intermediate temperatures",

abstract = "The segregation of constituent elements and impurities affects the surface composition of solid oxide electrode materials, and hence, the rate of the surface exchange reaction. In this work, we compare segregation occurring at 400 °C in Pr0.5Sr0.5CoO3-d (PSCO) and PrBaCo2O5-d (PBCO). The surface composition changes rapidly on annealing at low temperature, with segregation of the divalent cation evident after just 15 minutes. The PBCO contained a Na impurity which undergoes similar segregation behavior to the Ba, becoming the dominant surface cation after 2 hours of annealing. Although cation mobility in these materials is slow compared to oxygen, it is sufficient to cause significant changes in surface composition on timescales of the order of hours.",

author = "J. Druce and H. T{\'e}llez and Ishihara, {H. T.} and Kilner, {J. A.}",

note = "Publisher Copyright: {\textcopyright} The Electrochemical Society.; 1st Symposium on Solid-Gas Electrochemical Interfaces, SGEI 2015 - 227th ECS Meeting ; Conference date: 24-05-2015 Through 28-05-2015",

year = "2015",

doi = "10.1149/06602.0061ecst",

language = "English",

series = "ECS Transactions",

publisher = "Electrochemical Society Inc.",

number = "2",

pages = "61--68",

editor = "E. Ivers-Tiffee and Mogensen, {M. B.} and Adler, {S. B.} and T. Kawada",

booktitle = "Solid-Gas Electrochemical Interfaces � SGEI 1",

edition = "2",

}

TY - GEN

T1 - Surface segregation in solid oxide electrode materials occurring at intermediate temperatures

AU - Druce, J.

AU - Téllez, H.

AU - Ishihara, H. T.

AU - Kilner, J. A.

N1 - Publisher Copyright: © The Electrochemical Society.

PY - 2015

Y1 - 2015

N2 - The segregation of constituent elements and impurities affects the surface composition of solid oxide electrode materials, and hence, the rate of the surface exchange reaction. In this work, we compare segregation occurring at 400 °C in Pr0.5Sr0.5CoO3-d (PSCO) and PrBaCo2O5-d (PBCO). The surface composition changes rapidly on annealing at low temperature, with segregation of the divalent cation evident after just 15 minutes. The PBCO contained a Na impurity which undergoes similar segregation behavior to the Ba, becoming the dominant surface cation after 2 hours of annealing. Although cation mobility in these materials is slow compared to oxygen, it is sufficient to cause significant changes in surface composition on timescales of the order of hours.

AB - The segregation of constituent elements and impurities affects the surface composition of solid oxide electrode materials, and hence, the rate of the surface exchange reaction. In this work, we compare segregation occurring at 400 °C in Pr0.5Sr0.5CoO3-d (PSCO) and PrBaCo2O5-d (PBCO). The surface composition changes rapidly on annealing at low temperature, with segregation of the divalent cation evident after just 15 minutes. The PBCO contained a Na impurity which undergoes similar segregation behavior to the Ba, becoming the dominant surface cation after 2 hours of annealing. Although cation mobility in these materials is slow compared to oxygen, it is sufficient to cause significant changes in surface composition on timescales of the order of hours.

UR - http://www.scopus.com/inward/record.url?scp=84931074611&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84931074611&partnerID=8YFLogxK

U2 - 10.1149/06602.0061ecst

DO - 10.1149/06602.0061ecst

M3 - Conference contribution

AN - SCOPUS:84931074611

T3 - ECS Transactions

SP - 61

EP - 68

BT - Solid-Gas Electrochemical Interfaces � SGEI 1

A2 - Ivers-Tiffee, E.

A2 - Mogensen, M. B.

A2 - Adler, S. B.

A2 - Kawada, T.

PB - Electrochemical Society Inc.

T2 - 1st Symposium on Solid-Gas Electrochemical Interfaces, SGEI 2015 - 227th ECS Meeting

Y2 - 24 May 2015 through 28 May 2015

ER -

Surface segregation in solid oxide electrode materials occurring at intermediate temperatures

Abstract

Publication series

Other

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this