(Nd/Pr)2NiO4+δ: reaction intermediates and redox behavior explored by in situ neutron powder diffraction during electrochemical oxygen intercalation
| hal.structure.identifier | Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM] | |
| dc.contributor.author | CERETTI, Monica | |
| hal.structure.identifier | Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM] | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | WAHYUDI, Olivia | |
| hal.structure.identifier | Laboratoire Léon Brillouin [LLB - UMR 12] | |
| dc.contributor.author | ANDRÉ, Gilles | |
| hal.structure.identifier | Rheinisch-Westfälische Technische Hochschule Aachen University [RWTH] | |
| dc.contributor.author | MEVEN, Martin | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | VILLESUZANNE, Antoine | |
| hal.structure.identifier | Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier [ICGM] | |
| dc.contributor.author | PAULUS, Werner | |
| dc.date.issued | 2018 | |
| dc.identifier.issn | 0020-1669 | |
| dc.description.abstractEn | Oxygen intercalation/deintercalation in Pr2NiO4+δ and Nd2NiO4+δ was followed by in situ neutron powder diffraction during electrochemical oxidation/reduction, in a dedicated reaction cell at room temperature. For both systems three phases, all showing the same line width, were identified. The starting phases Pr2NiO4.23 and Nd2NiO4.24, considered with an average orthorhombic Fmmm symmetry, although both show a slight monoclinic distortion, get reduced in a two-phase reaction step to tetragonal intermediate phases with 0.07 ≤ δ ≤ 0.10 and P42/ ncm space group, which on further reduction transform, again in a two-phase reaction step, toward the respective stoichiometric (Pr/Nd)2NiO4.0 phases, with Bmab space group. Electrochemical oxidation does, however, not proceed fully reversibly for both cases: while the reoxidation of Nd2NiO4+δ is limited to the tetragonal intermediate phase with δ = 0.10, the homologous Pr2NiO4+δ can be reoxidized up to δ = 0.17, showing orthorhombic symmetry. For the intermediate tetragonal phase, we were able to establish for Pr2NiO4.09 a complex anharmonic displacement behavior of the apical oxygen atoms, as analyzed by single-crystal neutron diffraction and maximum entropy analysis, in agreement with a low- T diffusion pathway for oxygen ions, activated by lattice dynamics. | |
| dc.language.iso | en | |
| dc.publisher | American Chemical Society | |
| dc.subject.en | Non-Stoichiometric Oxides | |
| dc.subject.en | in-situ | |
| dc.subject.en | neutron diffraction | |
| dc.subject.en | electrochemistry | |
| dc.subject.en | oxygen ionic conductors | |
| dc.subject.en | Ruddlesden-Popper oxides | |
| dc.title.en | (Nd/Pr)2NiO4+δ: reaction intermediates and redox behavior explored by in situ neutron powder diffraction during electrochemical oxygen intercalation | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1021/acs.inorgchem.8b00393 | |
| dc.subject.hal | Chimie/Chimie inorganique | |
| dc.subject.hal | Chimie/Autre | |
| bordeaux.journal | Inorganic Chemistry | |
| bordeaux.page | 4657–4666 | |
| bordeaux.volume | 57 | |
| bordeaux.issue | 8 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-01760591 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-01760591v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Inorganic%20Chemistry&rft.date=2018&rft.volume=57&rft.issue=8&rft.spage=4657%E2%80%934666&rft.epage=4657%E2%80%934666&rft.eissn=0020-1669&rft.issn=0020-1669&rft.au=CERETTI,%20Monica&WAHYUDI,%20Olivia&ANDR%C3%89,%20Gilles&MEVEN,%20Martin&VILLESUZANNE,%20Antoine&rft.genre=article |
Files in this item
| Files | Size | Format | View |
|---|---|---|---|
|
There are no files associated with this item. |
|||