Neutron diffraction study of A-site deficient hydrated Perovskites

DOI

Transition metal ions can be easily introduced in the B-site of perovskites with general formula ABO3 and exsolved on their surfaces upon reduction, to enhance the catalytic properties in energy applications such as solid oxide cells. Based on the stoichiometries we explored so far, we have good experimental evidence to believe that Ni2+ ions could also be substituted on the A-site of hydrated CaTiO3 and then exsolved upon reduction. Formation of unusual non-stoichiometries with a large proportion of A-site deficiency would be associated with the incorporation of hydroxyl ions in the perovskite structure, and the hydration enhanced proton conductivity. Neutron diffraction study will deepen our understanding of the substitution mechanisms and indeed the indications of protonic conduction allowing for a better design and tailoring of new catalysts and energy materials.

Identifier
DOI https://doi.org/10.5286/ISIS.E.RB1920629-1
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/108675187
Provenance
Creator Dr JINGOO LEE; Dr Alexandra Gibbs; Dr Cristian Savaniu; Dr Julia Payne; Dr Martin Jones; Dr Aaron Naden; Professor John Irvine
Publisher ISIS Neutron and Muon Source
Publication Year 2022
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Chemistry; Natural Sciences; Physics
Temporal Coverage Begin 2019-11-30T08:30:00Z
Temporal Coverage End 2019-12-03T08:32:36Z