The Mixed Valence Structure of “R-NiF3”

Hector, Andrew L.; Hope, Eric G.; Levason, William; Weller, Mark T.

doi:10.1002/(sici)1521-3749(1998120)624:12<1982::aid-zaac1982>3.0.co;2-4

Cited by 10 publications

(3 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, the oxidation peak at the potential of +3.57 V (vs. QRE) is assigned as the oxidation of Ni 2+ to Ni 3+ . It must be noted that the assignment ignores the possible occurrence of a mixed valence state of the type Ni 2+ [Ni 4+ F 6 ] or Ni 2+ [Ni 3+ F 5 ] . Furthermore, more complicated amorphous structures are possible for the film.…”

Section: Discussionmentioning

confidence: 99%

Combining Theory and Experiment to Characterize the Voltammetric Behavior of Nickel Anodes in the Simons Process

Mattsson

Senges

Riedel

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

The Simons process, otherwise known as the electrochemical fluorination (ECF) method, is widely used in industry to electrolytically synthesize chemicals for various purposes. Even to this day, the exact mechanism of the ECF reaction remains unknown, but is believed to involve the formation of an anodic nickel fluoride film with highly oxidized nickel centers. In this study, experiments and density functional theory calculations are combined to characterize the initial anodic peak occurring at potentials typically required in an ECF cell. NiF2 is believed to form a passivating layer at low potentials. The calculations show that a potential of +3.1 V is required to oxidize surface Ni2+ centers to Ni3+. This is in good agreement with the measured anodic peak at +3.57 V.

show abstract

Section: Discussionmentioning

confidence: 99%

Combining Theory and Experiment to Characterize the Voltammetric Behavior of Nickel Anodes in the Simons Process

Mattsson

Senges

Riedel

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…200 K. 83 Some polymorphs of NiF 3 and PdF 3 are in fact the mixed-valence M(II)M(IV)F 6 species. 84 Early TM difluorides are very often AFM, similar to trifluorides. 85 The largest Ne el temperature (76 K) is seen for the rutile form of FeF 2 .…”

Section: Fluorides Of Transition Metals With Substantially Covalent M...mentioning

confidence: 99%

The theory-driven quest for a novel family of superconductors: fluorides

Grochala¹

2009

J. Mater. Chem.

View full text Add to dashboard Cite

“…The absorption edge at 8337.0 eV can be attributed to Ni 0 of the underlying bulk material of the electrode and the peak at 8352.5 eV is assigned to Ni II centers, as confirmed by comparison to a sample of NiF 2 . More importantly, the absorption maximum at 8354.0 eV is characteristic for highly oxidized nickel centers, 38,43 as the XANES spectra of the reference substances K 2 NiF 6 , NiF 3 and NiF 4 feature coinciding white lines at 8354.6 eV (Fig. S35†).…”

mentioning

confidence: 99%