Segregation of nickel/iron bimetallic particles from lanthanum doped strontium titanates to improve sulfur stability of solid oxide fuel cell anodes

Steiger, Patrick; Burnat, Dariusz Artur; Kröcher, Oliver; Heel, Andre; Ferri, Davide

doi:10.3390/catal9040332

Please use this identifier to cite or link to this item: https://doi.org/10.21256/zhaw-26229

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Segregation of nickel/iron bimetallic particles from lanthanum doped strontium titanates to improve sulfur stability of solid oxide fuel cell anodes
Authors:	Steiger, Patrick Burnat, Dariusz Artur Kröcher, Oliver Heel, Andre Ferri, Davide
et. al:	No
DOI:	10.3390/catal9040332 10.21256/zhaw-26229
Published in:	Catalysts
Volume(Issue):	9
Issue:	4
Page(s):	332
Issue Date:	2019
Publisher / Ed. Institution:	MDPI
ISSN:	2073-4344
Language:	English
Subjects:	Nickel; La0.3Sr0.55Ti0.95Ni0.05O3±δ; Catalyst regeneration; Structural reversibility; H2S; Solid oxide fuel cell
Subject (DDC):	540: Chemistry
Abstract:	Perovskite derived Ni catalysts offer the remarkable benefit of regeneration after catalyst poisoning or Ni particle growth through the reversible segregation of Ni from the perovskite-type oxide host. Although this property allows for repeated catalyst regeneration, improving Ni catalyst stability towards sulfur poisoning by H2S is highly critical in solid oxide fuel cells. In this work Mn, Mo, Cr and Fe were combined with Ni at the B-site of La0.3Sr0.55TiO3±δ to explore possible benefits of segregation of two transition metals towards sulfur tolerance. Catalytic activity tests towards the water gas shift reaction were carried out to evaluate the effect of the additional metal on the catalytic activity and sulfur stability of the Ni catalyst. The addition of Fe to the Ni perovskite catalyst was found to increase sulfur tolerance. The simultaneous segregation of Fe and Ni from La0.3Sr0.55Ti0.95-xNi0.05FexO3±δ (x ≤ 0.05) was investigated by temperature programmed reduction, X-ray diffraction and X-ray absorption spectroscopy and catalytic tests after multiple redox cycles. It is shown that catalytic properties of the active phase were affected likely by the segregation of Ni/Fe alloy particles and that the reversible segregation of Ni persisted, while it was limited in the case of Fe under the same conditions.
URI:	https://digitalcollection.zhaw.ch/handle/11475/26229
Fulltext version:	Published version
License (according to publishing contract):	CC BY 4.0: Attribution 4.0 International
Departement:	School of Engineering
Organisational Unit:	Institute of Materials and Process Engineering (IMPE)
Appears in collections:	Publikationen School of Engineering

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Steiger, P., Burnat, D. A., Kröcher, O., Heel, A., & Ferri, D. (2019). Segregation of nickel/iron bimetallic particles from lanthanum doped strontium titanates to improve sulfur stability of solid oxide fuel cell anodes. Catalysts, 9(4), 332. https://doi.org/10.3390/catal9040332

Steiger, P. et al. (2019) ‘Segregation of nickel/iron bimetallic particles from lanthanum doped strontium titanates to improve sulfur stability of solid oxide fuel cell anodes’, Catalysts, 9(4), p. 332. Available at: https://doi.org/10.3390/catal9040332.

P. Steiger, D. A. Burnat, O. Kröcher, A. Heel, and D. Ferri, “Segregation of nickel/iron bimetallic particles from lanthanum doped strontium titanates to improve sulfur stability of solid oxide fuel cell anodes,” Catalysts, vol. 9, no. 4, p. 332, 2019, doi: 10.3390/catal9040332.

STEIGER, Patrick, Dariusz Artur BURNAT, Oliver KRÖCHER, Andre HEEL und Davide FERRI, 2019. Segregation of nickel/iron bimetallic particles from lanthanum doped strontium titanates to improve sulfur stability of solid oxide fuel cell anodes. Catalysts. 2019. Bd. 9, Nr. 4, S. 332. DOI 10.3390/catal9040332

Steiger, Patrick, Dariusz Artur Burnat, Oliver Kröcher, Andre Heel, and Davide Ferri. 2019. “Segregation of Nickel/Iron Bimetallic Particles from Lanthanum Doped Strontium Titanates to Improve Sulfur Stability of Solid Oxide Fuel Cell Anodes.” Catalysts 9 (4): 332. https://doi.org/10.3390/catal9040332.

Steiger, Patrick, et al. “Segregation of Nickel/Iron Bimetallic Particles from Lanthanum Doped Strontium Titanates to Improve Sulfur Stability of Solid Oxide Fuel Cell Anodes.” Catalysts, vol. 9, no. 4, 2019, p. 332, https://doi.org/10.3390/catal9040332.