InP and CdS Photoanodes in Concentrated Aqueous Iodide Electrolytes

Lynn Schneemeyer, B. Miller

Research output: Contribution to journalArticleResearchpeer-review

30 Citations (Scopus)

Abstract

Conditions for the efficient photo-oxidation of iodide for both n-CdS and n-InP are demonstrated by theoretical collection properties in rotating ring-disk electrode configurations. A specific I-CdS surface interaction promoting hole transfer kinetics is evidenced by open-circuit potential shifts of illuminated disks with iodide concentration and nearly quantitative disk iodine production at low iodide concentrations. For n-InP, however, high concentrations of CaI2 and control of hydrogen ion levels are both needed to maintain a thin, charge conducting semiconductor-oxide film and adequate kinetics for solution iodide oxidation. Acidified concentrated iodide is the first electrolyte with an n-InP photoanode to handle solar current densities.

Original languageEnglish
Pages (from-to)1977-1981
Number of pages5
JournalJournal of the Electrochemical Society
Volume129
Issue number9
DOIs
StatePublished - 1 Jan 1982

Fingerprint

Iodides
iodides
Electrolytes
electrolytes
Kinetics
Photooxidation
Iodine
Oxide films
Current density
Semiconductor materials
Oxidation
Hydrogen
Electrodes
Networks (circuits)
Ions
photooxidation
kinetics
hydrogen ions
surface reactions
iodine

Keywords

  • photo-oxidation
  • potential
  • solar current densities

Cite this

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InP and CdS Photoanodes in Concentrated Aqueous Iodide Electrolytes. / Schneemeyer, Lynn; Miller, B.

In: Journal of the Electrochemical Society, Vol. 129, No. 9, 01.01.1982, p. 1977-1981.

Research output: Contribution to journalArticleResearchpeer-review

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AB - Conditions for the efficient photo-oxidation of iodide for both n-CdS and n-InP are demonstrated by theoretical collection properties in rotating ring-disk electrode configurations. A specific I-CdS surface interaction promoting hole transfer kinetics is evidenced by open-circuit potential shifts of illuminated disks with iodide concentration and nearly quantitative disk iodine production at low iodide concentrations. For n-InP, however, high concentrations of CaI2 and control of hydrogen ion levels are both needed to maintain a thin, charge conducting semiconductor-oxide film and adequate kinetics for solution iodide oxidation. Acidified concentrated iodide is the first electrolyte with an n-InP photoanode to handle solar current densities.

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