Abstract: A Ni–Cr anode, dip coated with Ce oxide for increasing the resistance to sulfur poisoning of high-temperature molten carbonate fuel cell, has been investigated by neutron diffraction. Crystallographic characterization of the phases present in this anode has been obtained by Rietveld refinement. In the substrate Ni–Cr is detected, with (Formula presented.) structure and weight volume fraction of 68.50(46) wt %. Additionally, due to oxidation during coating also NiO is present (space group (Formula presented.)), with weight volume fraction of 25.28(18) wt %. The thin protective layer consists of nanostructured CeO2 ((Formula presented.)), with an estimated massive volume fraction of 6.3(5) wt %. These results support the effectiveness of the adopted CeO2 deposition procedure and show the usefulness of neutron diffraction also for investigating thin protective layers.

Crystallographic Characterization of a CeO2 Protective Layer Deposited on a Ni–Cr Anode for Molten Carbonate Fuel Cell

Coppola R.;
2020

Abstract

Abstract: A Ni–Cr anode, dip coated with Ce oxide for increasing the resistance to sulfur poisoning of high-temperature molten carbonate fuel cell, has been investigated by neutron diffraction. Crystallographic characterization of the phases present in this anode has been obtained by Rietveld refinement. In the substrate Ni–Cr is detected, with (Formula presented.) structure and weight volume fraction of 68.50(46) wt %. Additionally, due to oxidation during coating also NiO is present (space group (Formula presented.)), with weight volume fraction of 25.28(18) wt %. The thin protective layer consists of nanostructured CeO2 ((Formula presented.)), with an estimated massive volume fraction of 6.3(5) wt %. These results support the effectiveness of the adopted CeO2 deposition procedure and show the usefulness of neutron diffraction also for investigating thin protective layers.
coating materials
fuel cells
neutron diffraction
sulfur poisoning
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12079/56831
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