skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Extended x-ray absorption fine structure spectroscopy and x-ray absorption near edge spectroscopy study of aliovalent doped ceria to correlate local structural changes with oxygen vacancies clustering

Abstract

This study provides atomic scale insight to understand the role of aliovalent dopants on oxygen vacancies clustering and dissociation mechanism in ceria system in order to enhance the performance of oxy-ion conductor. Dopants induced microscale changes in ceria are probed by extended X-ray absorption fine structure spectroscopy, X-ray absorption near edge spectra, and Raman spectroscopy. The results are explored to establish a correlation between atomic level structural changes (coordination number, interatomic spacing) → formation of dimer and trimer type cation-oxygen vacancies defect complex (intrinsic and extrinsic) → dissociation of oxygen vacancies from defect cluster → ionic conductivity temperature. It is a strategic approach to understand key physics of ionic conductivity mechanism in order to reduce operating temperature of electrolytes for intermediate temperature (300–450 °C) electrochemical devices for the first time.

Authors:
;  [1];  [2]
  1. Department of Physics, Rashtrasant Tukadoji Maharaj Nagpur University, Nagpur 440033 (India)
  2. Atomic and molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085 (India)
Publication Date:
OSTI Identifier:
22591542
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 108; Journal Issue: 14; Other Information: (c) 2016 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; ABSORPTION SPECTROSCOPY; CATIONS; CERIUM OXIDES; COORDINATION NUMBER; DEFECTS; DISSOCIATION; DOPED MATERIALS; ELECTROCHEMISTRY; ELECTROLYTES; EQUIPMENT; FINE STRUCTURE; IONIC CONDUCTIVITY; OXYGEN; RAMAN SPECTROSCOPY; X-RAY SPECTROSCOPY

Citation Formats

Shirbhate, S. C., Acharya, S. A., E-mail: saha275@yahoo.com, and Yadav, A. K. Extended x-ray absorption fine structure spectroscopy and x-ray absorption near edge spectroscopy study of aliovalent doped ceria to correlate local structural changes with oxygen vacancies clustering. United States: N. p., 2016. Web. doi:10.1063/1.4945098.
Shirbhate, S. C., Acharya, S. A., E-mail: saha275@yahoo.com, & Yadav, A. K. Extended x-ray absorption fine structure spectroscopy and x-ray absorption near edge spectroscopy study of aliovalent doped ceria to correlate local structural changes with oxygen vacancies clustering. United States. doi:10.1063/1.4945098.
Shirbhate, S. C., Acharya, S. A., E-mail: saha275@yahoo.com, and Yadav, A. K. Mon . "Extended x-ray absorption fine structure spectroscopy and x-ray absorption near edge spectroscopy study of aliovalent doped ceria to correlate local structural changes with oxygen vacancies clustering". United States. doi:10.1063/1.4945098.
@article{osti_22591542,
title = {Extended x-ray absorption fine structure spectroscopy and x-ray absorption near edge spectroscopy study of aliovalent doped ceria to correlate local structural changes with oxygen vacancies clustering},
author = {Shirbhate, S. C. and Acharya, S. A., E-mail: saha275@yahoo.com and Yadav, A. K.},
abstractNote = {This study provides atomic scale insight to understand the role of aliovalent dopants on oxygen vacancies clustering and dissociation mechanism in ceria system in order to enhance the performance of oxy-ion conductor. Dopants induced microscale changes in ceria are probed by extended X-ray absorption fine structure spectroscopy, X-ray absorption near edge spectra, and Raman spectroscopy. The results are explored to establish a correlation between atomic level structural changes (coordination number, interatomic spacing) → formation of dimer and trimer type cation-oxygen vacancies defect complex (intrinsic and extrinsic) → dissociation of oxygen vacancies from defect cluster → ionic conductivity temperature. It is a strategic approach to understand key physics of ionic conductivity mechanism in order to reduce operating temperature of electrolytes for intermediate temperature (300–450 °C) electrochemical devices for the first time.},
doi = {10.1063/1.4945098},
journal = {Applied Physics Letters},
number = 14,
volume = 108,
place = {United States},
year = {Mon Apr 04 00:00:00 EDT 2016},
month = {Mon Apr 04 00:00:00 EDT 2016}
}