Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Rotating Ring (Pt)-Disc (FeS2) Electrode Behavior in Hydrochloric Solutions

Yin1, Kelsall, Vaughan

  • 1T. H. Huxley School, Imperial College, Prince Consort Road, London, SW7 2BP, United Kingdom

Journal of Colloid and Interface Science
|February 4, 1999
PubMed
Summary

This study reveals pyrite oxidation intermediates formed on a rotating disc electrode, then oxidized on a ring electrode in hydrochloric solutions. Pyrite oxidation pathways were elucidated, differentiating between sulfur and ferrous ion formation.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Laparoscopic based renal denervation in a canine neurogenic hypertension model.

BMC cardiovascular disorders·2020
Same author

Immunolocalization and possible effect of a moth allatotropin-like substance in a fly, Phormia regina (Diptera: Calliphoridae).

Journal of insect physiology·2000
Same author

Multidrug Resistance and Prodrug Activation for Cancer Gene Therapy of Breast Cancer.

Breast cancer (Tokyo, Japan)·2000
Same author

Effective field theory of the zero-temperature triangular-lattice antiferromagnet: A monte carlo study

Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics·2000
Same author

Temporal and spatial activity of a promoter from a pea enzyme inhibitor gene and its exploitation for seed quality improvement.

Plant science : an international journal of experimental plant biology·2000
Same author

Segment Length and Risk for Neoplastic Progression in Patients with Barrett Esophagus.

Annals of internal medicine·2000

Area of Science:

  • Electrochemistry
  • Materials Science
  • Geochemistry

Background:

  • Pyrite (FeS2) oxidation is crucial in various geological and industrial processes.
  • Understanding pyrite surface chemistry is essential for predicting its environmental fate and reactivity.
  • Previous studies have not fully elucidated the intermediate species formed during pyrite oxidation.

Purpose of the Study:

  • To investigate the surface oxidation process of pyrite in hydrochloric solutions.
  • To identify and characterize oxidation intermediates of pyrite.
  • To differentiate oxidation pathways of pyrite under varying electrochemical potentials.

Main Methods:

  • Utilized a rotating ring-disc electrode (RRDE) setup with a platinum (Pt) ring and iron disulfide (FeS2) disc.

Related Experiment Videos

  • Performed electrochemical experiments in hydrochloric acid solutions.
  • Varied the applied potentials on the disc and ring electrodes to study oxidation intermediates and products.

    • Main Results:

    • For the first time, oxidation intermediates of pyrite were observed forming on the disc electrode and subsequently oxidizing on the ring electrode.
    • At specific potentials (0.43–0.62 V on disc, 1 V vs SCE on ring), pyrite oxidation yielded approximately 50% ferric and sulfate ions, and 50% sulfur and ferrous ions.
    • At higher disc potentials (1.22 V vs SCE), over 90% of pyrite oxidized to ferric and sulfate ions, with minimal ferrous ion formation.

    Conclusions:

    • The study successfully identified distinct pyrite oxidation pathways.
    • Electrochemical potential significantly influences the distribution of oxidation products, including sulfur and ferrous ions.
    • The RRDE technique provides valuable insights into transient oxidation intermediates in pyrite electrochemistry.