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Title: Compatibility study of La2NiO4+δ and La2Mo1.5W0.5O9 as electrode-electrolyte material for solid oxide fuel cell
Authors: Singh S.
Sil, Anjan
Bysakh S.
Published in: Journal of Electron Spectroscopy and Related Phenomena
Abstract: The present work investigates the chemical compatibility of La2NiO4+δ (LN) and La2Mo1.5W0.5O9 (W-LMO) as cathode/electrolyte and NiWO4 (NW)/La2Mo2O9 (LMO) as anode/electrolyte material for solid oxide fuel cell (SOFC) application respectively. The x- ray diffraction (XRD) study of LN/W-LMO shows the existence of five phases viz., La2NiO4+δ, La2Mo1.5W0.5O9, NiWO4, NiO and La1.77Mo1.77O8.001. Whereas, the XRD analysis of NW/LMO shows the formation of NiO, higher order molybdates viz., La5Mo4O14 and La12Mo6O35 as a result of partial Mo reduction. The formation of NiWO4 as a secondary phase in La2NiO4+δ / La2Mo1.5W0.5O9 is a potential anode material which is studied with La2Mo2O9 as anode/electrolyte by x-ray photoelectron spectroscopy (XPS). The XPS analysis of NW/LMO in Ar-H2 atmosphere reveals the partial reduction of Mo to lower oxidation states. The presence of NiWO4 is also verified by Raman spectroscopy with peaks at 698, 778 and 891 cm−1 with the signatures of W-LMO and Mo-O bonding. © 2021 Elsevier B.V.
Citation: Journal of Electron Spectroscopy and Related Phenomena, 250
Issue Date: 2021
Publisher: Elsevier B.V.
Keywords: Ar-H2 atmosphere
W doped La2Mo2O9
X- ray photoelectron spectroscopy
ISSN: 3682048
Author Scopus IDs: 57211208970
Author Affiliations: Singh, S., Acoustics Instrumentation and Mechanical Systems Group, CSIR- Central Building Research Institute Roorkee, Roorkee, 247667, India
Sil, A., Department of Metallurgical and Materials Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Bysakh, S., Advanced Materials Characterisation Unit, Central Glass and Ceramic Research Institute Kolkata700032, India
Funding Details: One of authors (Siddharth Singh) is grateful to Director, CSIR-CBRI Roorkee, for providing motivation and support towards this research work.
Corresponding Author: Singh, S.; Acoustics Instrumentation and Mechanical Systems Group, India; email:
Appears in Collections:Journal Publications [MT]

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