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Near ambient pressure X-ray photoelectron - and impedance spectroscopy study of NiO - Ce 0.9 Gd 0.1 O 2-δ anode reduction using a novel dual-chamber spectroelectrochemical cell

Nurk, Gunnar; Kooser, Kuno; Urpelainen, Samuli LU ; Käämbre, Tanel LU ; Joost, Urmas; Kodu, Margus; Kivi, Indrek; Kanarbik, Rait; Kukk, Edwin and Lust, Enn (2018) In Journal of Power Sources 378. p.589-596
Abstract
This paper reports an experimental study, where the reduction of NiO-GDC to Ni-GDC is monitored using high temperature (HT) near ambient pressure (NAP) X-ray photoelectron spectroscopy (XPS) in combination with simultaneous impedance spectroscopy (IS). The experiment is carried out using a dual chamber (DC)-HT-NAP-XPS cell designed for membrane electrode studies. The dual chamber measurement cell enables adequate electrochemical feedback, i.e. the possibility of measuring the working electrode potential against a Pt reference electrode in a well-known environment (pO2 = 0.2 bar) and of monitoring the pO2 value on the studied electrode through open circuit voltage (OCV) measurements. Simultaneous changes of electrode impedance and O 1s, Ce... (More)
This paper reports an experimental study, where the reduction of NiO-GDC to Ni-GDC is monitored using high temperature (HT) near ambient pressure (NAP) X-ray photoelectron spectroscopy (XPS) in combination with simultaneous impedance spectroscopy (IS). The experiment is carried out using a dual chamber (DC)-HT-NAP-XPS cell designed for membrane electrode studies. The dual chamber measurement cell enables adequate electrochemical feedback, i.e. the possibility of measuring the working electrode potential against a Pt reference electrode in a well-known environment (pO2 = 0.2 bar) and of monitoring the pO2 value on the studied electrode through open circuit voltage (OCV) measurements. Simultaneous changes of electrode impedance and O 1s, Ce 4d and Ni 3p electron binding energies are observed and discussed. The shape of the O 1s photoelectron peak is significantly influenced by the equilibria of Ce4+ ↔ Ce3+ and Ni2+ ↔ Ni0, influenced by pO2, in analysis chamber. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Power Sources
volume
378
pages
589 - 596
publisher
Elsevier
external identifiers
  • scopus:85040321132
ISSN
0378-7753
DOI
language
English
LU publication?
yes
id
cafbebbd-35ed-4d03-8d74-50bb6877613c
date added to LUP
2018-01-17 09:20:07
date last changed
2018-05-29 12:06:35
@article{cafbebbd-35ed-4d03-8d74-50bb6877613c,
  abstract     = {This paper reports an experimental study, where the reduction of NiO-GDC to Ni-GDC is monitored using high temperature (HT) near ambient pressure (NAP) X-ray photoelectron spectroscopy (XPS) in combination with simultaneous impedance spectroscopy (IS). The experiment is carried out using a dual chamber (DC)-HT-NAP-XPS cell designed for membrane electrode studies. The dual chamber measurement cell enables adequate electrochemical feedback, i.e. the possibility of measuring the working electrode potential against a Pt reference electrode in a well-known environment (pO2 = 0.2 bar) and of monitoring the pO2 value on the studied electrode through open circuit voltage (OCV) measurements. Simultaneous changes of electrode impedance and O 1s, Ce 4d and Ni 3p electron binding energies are observed and discussed. The shape of the O 1s photoelectron peak is significantly influenced by the equilibria of Ce4+ ↔ Ce3+ and Ni2+ ↔ Ni0, influenced by pO2, in analysis chamber.},
  author       = {Nurk, Gunnar and Kooser, Kuno and Urpelainen, Samuli and Käämbre, Tanel and Joost, Urmas and Kodu, Margus and Kivi, Indrek and Kanarbik, Rait and Kukk, Edwin and Lust, Enn},
  issn         = {0378-7753},
  language     = {eng},
  month        = {02},
  pages        = {589--596},
  publisher    = {Elsevier},
  series       = {Journal of Power Sources},
  title        = {Near ambient pressure X-ray photoelectron - and impedance spectroscopy study of NiO - Ce 0.9 Gd 0.1 O 2-δ  anode reduction using a novel dual-chamber spectroelectrochemical cell},
  url          = {http://dx.doi.org/},
  volume       = {378},
  year         = {2018},
}