Impact of chromium coordination on the single-electron potentials for the reduction of oxygen to water
Journal Article
·
· Journal of the American Chemical Society; (United States)
- Iowa State Univ., Ames, IA (United States)
Chemical equilibration of CrOO[sup 2+] has allowed evaluation of the potential for the half-reaction CrOO[sup 2+] + H[sup +] + e[sup [minus]] [yields] CrOOH[sup 2+] as +0.82 V vs NHE. Kinetic data for the reaction of CrO[sup 2+] and H[sub 2]O[sub 2] allow refinement of the potential for the CrO[sup 2+] + 2H[sup +] + e[sup [minus]] [yields] Cr[sup 3+] + H[sub 2]O reaction to lie within the range 1.71 V [le] E[sup o] [le] 1.85 V. With these values the potentials for each step of reduction of water to oxygen, as mediated by chromium complexation, are obtained. The chemical implications of these findings for the reactions and reactivity of the three chromium-containing species CrOO[sup 2+], CrOOH[sup 2+], and CrO[sup 2+] are presented. 30 refs., 1 figs., 1 tab.
- OSTI ID:
- 7069641
- Journal Information:
- Journal of the American Chemical Society; (United States), Journal Name: Journal of the American Chemical Society; (United States) Vol. 116:8; ISSN JACSAT; ISSN 0002-7863
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
400400 -- Electrochemistry
661300 -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED PARTICLES
CHEMICAL REACTIONS
CHEMISTRY
CHROMIUM COMPLEXES
COMPILED DATA
COMPLEXES
DATA
ELECTROCHEMISTRY
ELEMENTS
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROXYL RADICALS
INFORMATION
IONS
IRON IONS
NONMETALS
NUMERICAL DATA
OXYGEN
OXYGEN COMPOUNDS
PEROXIDES
RADICALS
THERMODYNAMICS
TRANSITION ELEMENT COMPLEXES
400201* -- Chemical & Physicochemical Properties
400400 -- Electrochemistry
661300 -- Other Aspects of Physical Science-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHARGED PARTICLES
CHEMICAL REACTIONS
CHEMISTRY
CHROMIUM COMPLEXES
COMPILED DATA
COMPLEXES
DATA
ELECTROCHEMISTRY
ELEMENTS
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROXYL RADICALS
INFORMATION
IONS
IRON IONS
NONMETALS
NUMERICAL DATA
OXYGEN
OXYGEN COMPOUNDS
PEROXIDES
RADICALS
THERMODYNAMICS
TRANSITION ELEMENT COMPLEXES