Optical absorption and XPS studies of (Ba1-xSrx)(Ce0.75Zr0.10Y0.15)O3-δ electrolytes for protonic ceramic fuel cells

Shivendra Kumar Jaiswal, Jongsup Hong, Kyung Joong Yoon, Ji Won Son, Hae Weon Lee, Jong Ho Lee

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Perovskite-type materials containing metal and cerium cations have been used as catalysts, membranes, electrodes in fuel cells, and hydrogen pumps. The effect of strontium doping on the perovskite-type structure has been evaluated and effectively maintains the cubic structure of (Ba1-xSrx)(Ce0.75Zr0.10Y0.15)O3-δ. X-ray photoelectron spectroscopy (XPS) was performed on the oxidation states of barium, strontium, cerium, zirconium, yttrium and oxygen. With strontium doping, the oxidation state of cerium ions in 4+ increases and results in the decrease in oxygen vacancy concentration. These are attributed to the strong binding energy of (A/B)-O bond which in turn, enhances the structural stability of electrolyte system. The free volume (Vf) is maximum for x=0.2 (Vf=33.1 Å3) and then decreases with further strontium insertion. The optical absorption peaks are attributed to charge transfer transitions and energy band gap (increases from ∼4.13 to ∼4.35 eV). However, the increase of band gap is only ∼5% with partial replacement of barium by strontium. These characteristics are useful to make (Ba1-xSrx)(Ce0.75Zr0.10Y0.15)O3-δ a promising candidate for futuristic and reliable fuel cell technology.

Original languageEnglish
Pages (from-to)10366-10372
Number of pages7
JournalCeramics International
Volume42
Issue number8
DOIs
Publication statusPublished - 2016 Jun 1

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Protonic ceramic fuel cells (PCFC)
Strontium
Light absorption
Electrolytes
Cerium
X ray photoelectron spectroscopy
Barium
Perovskite
Fuel cells
Energy gap
Doping (additives)
Yttrium
Oxidation
Free volume
Oxygen vacancies
Electron transitions
Binding energy
Zirconium
Band structure
Cations

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Jaiswal, Shivendra Kumar ; Hong, Jongsup ; Yoon, Kyung Joong ; Son, Ji Won ; Lee, Hae Weon ; Lee, Jong Ho. / Optical absorption and XPS studies of (Ba1-xSrx)(Ce0.75Zr0.10Y0.15)O3-δ electrolytes for protonic ceramic fuel cells. In: Ceramics International. 2016 ; Vol. 42, No. 8. pp. 10366-10372.
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Optical absorption and XPS studies of (Ba1-xSrx)(Ce0.75Zr0.10Y0.15)O3-δ electrolytes for protonic ceramic fuel cells. / Jaiswal, Shivendra Kumar; Hong, Jongsup; Yoon, Kyung Joong; Son, Ji Won; Lee, Hae Weon; Lee, Jong Ho.

In: Ceramics International, Vol. 42, No. 8, 01.06.2016, p. 10366-10372.

Research output: Contribution to journalArticle

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