Esr characterization and thermal transformations of Fe(III) ions in active aluminas derived from mixed oxalato precursors

Polycrystalline samples of cation-deficient FeAI204 spinel with Fe 3+ ions and vacancies on both octahedral and tetrahedral sites have been investigated by electron spin resonance (ESR). For samples annealing at 1100~ and slightly oxidized (~0.16wt% Fe3+), the ESR spectrum originates from Fe 3+ ions located in trigonally distorted octahedral sites of ~z-AI203 formed during the annealing and also from Fe 3+ ions introduced by oxidation at low temperature in octahedral sites of spinel structure. The samples with concentration between 0.1 6 and 1.6wt% Fe 3+ show the majority of Fe 3+ ions to be on tetrahedral sites and the rhombic symmetry around the Fe 3+ ions is attributed to the presence of cation vacancies.

show abstract

Carbon-13 NMR relaxation time measurements of molybdenum carbonyl physisorbed on alumina

Shirley¹,

Frye²

1989

Spectrochimica Acta Part A: Molecular Spectroscopy

View full text Add to dashboard Cite

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Esr characterization and thermal transformations of Fe(III) ions in active aluminas derived from mixed oxalato precursors

Cited by 4 publications

References 17 publications

ESR characterization of Fe(III) ions in polycrystalline cation-deficient FeAl2O4 spinel

ESR characterization of Fe(III) ions in polycrystalline cation-deficient FeAl2O4 spinel

ESR characterization of Fe(III) ions in polycrystalline cation-deficient FeAl2O4 spinel

Carbon-13 NMR relaxation time measurements of molybdenum carbonyl physisorbed on alumina

Contact Info

Product

Resources

About