Layered alkali rhodium oxides A/sub x/RhO/sub 2/: topotactic solvation, exchange, and redox reactions
The intercalation/deintercalation properties of the layered oxides LiRhO/sub 2/, and KRhO/sub 2/ have been investigated with respect to redox and exchange processes. The chemical reactivity was found to be strongly dependent upon the alkali cation. Only KRhO/sub 2/ is able to form hydrated phases and to undergo quantitative K/sup +//H/sup +/ exchange, resulting in the formation of the new layered hydrogen bronze HRhO/sub 2/. HRhO/sub 2/ has a limited phase range up to H/sub 1.1/RhO/sub 2/ and exhibits no Broensted acid character. LiRhO/sub 2/ and NaRhO/sub 2/ both show a limited cycling range in aprotic Li/sup +/ or Na/sup +/ electrolytes beyond which irreversible lattice disorder is observed. The origin of the significant differences in topotactic reactivity between layered dichalcogenide and oxide systems is discussed.
- Research Organization:
- Technische Universitaet, Berlin, Germany, F.R.
- OSTI ID:
- 5572458
- Journal Information:
- J. Solid State Chem.; (United States), Vol. 71:1
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
LITHIUM COMPOUNDS
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
REDOX REACTIONS
SOLVATION
POTASSIUM COMPOUNDS
RHODIUM OXIDES
SODIUM COMPOUNDS
CATIONS
ELECTROLYTES
EXPERIMENTAL DATA
LATTICE PARAMETERS
VOLTAMETRY
X-RAY DIFFRACTION
ALKALI METAL COMPOUNDS
CHALCOGENIDES
CHARGED PARTICLES
COHERENT SCATTERING
DATA
DIFFRACTION
INFORMATION
IONS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
RHODIUM COMPOUNDS
SCATTERING
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties
400400 - Electrochemistry