Siddharth, . and Bysakh, Sandip and Sil, Anjan (2018) X-ray photoelectron spectroscopy and ion dynamics study of W6+ doped La2Mo2O9 as SOFC electrolyte. Materials Research Bulletin, 105. pp. 36-44. ISSN 0025-5408

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The structural stability of La2Mo2-xWxO9 is well reported by many researchers but its studies on photoelectron spectroscopy, structural behaviour in Ar-H-2 (reducing) atmosphere and ion dynamics are rarely reported. Here we report for the first time, to the best of authors' knowledge, the above studies for W-doped La2Mo2O9 compounds. La2Mo2O9 doped with W6+ over the range of 0.25 <= x <= 1.75 at Mo6+ site is synthesised by solid-state reaction route. The x-ray diffraction studies show that at x = 0.5 the lattice parameter of the unit cell starts decreasing as a consequence of decrease in bond length between various elements present in the compound. The XPS analysis shows that in La2Mo2-xWxO9 is very much sensitive to reduction. The temperature dependent a.c. impedance spectroscopy study of La2Mo2-0.5W0.5O9 has been reported over the temperature range up to 653 K.

Item Type: Article
Uncontrolled Keywords: Ceramics; Photoelectron spectroscopy; Crystal structure; Ionic conductivity
Subjects: Electronics
Divisions: Fuel Cell and Battery
Depositing User: Bidhan Chaudhuri
Date Deposited: 31 Oct 2018 12:21
Last Modified: 31 Oct 2018 12:21

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