In situ X-Ray Diffraction Studies of Pr2-xNiO4+delta Crystal Structure Relaxation Caused by Oxygen Loss | Sciact - CRIS-system of Boreskov Institute of Catalysis

In situ X-Ray Diffraction Studies of Pr2-xNiO4+delta Crystal Structure Relaxation Caused by Oxygen Loss Full article

Conference

The 19th International Conference on Solid State Ionics (SSI-19)
02-07 Jun 2013 , Kyoto

Journal

Solid State Ionics
ISSN: 0167-2738

Output data

Year: 2014, Volume: 262, Pages: 918-922 Pages count : 5 DOI: 10.1016/j.ssi.2014.02.001

Tags

In situ XRD, Mass, conductivity and structure relaxations, Oxygen diffusion and surface chemical exchange coefficients, Oxygen loss, Praseodymium nickelates, Synchrotron radiation

Authors

Sadykov V. ^1,2 , Okhlupin Yu. ³ , Yeremeev N. ^1,2 , Vinokurov Z. ¹ , Shmakov A. ^1,2 , Belyaev V. ³ , Uvarov N. ³ , Mertens J. ⁴

Affiliations

1	Boreskov Institute of Catalysis SB RAS, Lavrentieva av., 5, 630090, Russia
2	Novosibirsk State University, Novosibirsk, Russia
3	Institute of Solid State Chemistry and Mechanochemistry SB RAS, Kutateladze str., 5, 630128, Russia
4	Institute of Energy and Climate Research, Forschungszentrum Julich GmbH, Julich, Germany

Fine powders of Pr2 − xNiO4 + δ (PNO) oxides (x = 0 ÷ 0.3) synthesized by Pechini route were uniaxially pressed into pellets and sintered at 1300 °C under air. Chemical diffusion coefficients (Dchem.) and surface exchange constants (kchem.) were estimated by analysis of the weight and conductivity relaxations after step-wise change of pO2. In situ XRD studies were carried out in VEPP-3 facilities of the Siberian Center of Synchrotron Radiation using unique high-temperature camera and procedures. Analysis of dynamics of the cell volume expansion caused by oxygen loss with due regard for penetration depth of X-rays into the pellet allowed to estimate Dchem and kchem found to be close to those obtained by traditional methods. Isolated Pr vacancies appear to be the most important for fast oxygen diffusion and high surface reactivity providing the highest values of kchem and Dchem for Pr1.9NiO4 + δ composition.

Sadykov V. , Okhlupin Y. , Yeremeev N. , Vinokurov Z. , Shmakov A. , Belyaev V. , Uvarov N. , Mertens J.
In situ X-Ray Diffraction Studies of Pr2-xNiO4+delta Crystal Structure Relaxation Caused by Oxygen Loss
Solid State Ionics. 2014. V.262. P.918-922. DOI: 10.1016/j.ssi.2014.02.001 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	May 17, 2013
Accepted:	Feb 1, 2014
Published online:	Feb 18, 2014
Published print:	Sep 1, 2014

Web of science:	WOS:000338810500201
Scopus:	2-s2.0-84903313216
Elibrary:	24061947
Chemical Abstracts:	2014:284215
Chemical Abstracts (print):	162:595795
OpenAlex:	W2148849016

DB	Citing
Web of science	26
Scopus	28
Elibrary	27
OpenAlex	26