Electrochemistry and Photoelectrochemistry of Pillared-Clay-Modified Electrodes

Daiting Rong, Yeong Kim, Thomas E. Mallouk

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Clay-modified electrodes (CME) were made by binding Al 13 O 4 (OH) 28 3+ -pillared montmorillonite to SnO 2 and Pt surfaces via a thin (2-4 monolayer thick) coating of polymerized silane I. The polymer provides a binding site for multiply charged anions [formula-omitted] such as Fe(CN) 6 4- and Mo(CN) 8 4- , while the clay external surface strongly binds large cations such as Os(bpy) 3 2+ and Ru(bpy) 3 2+ . Charge-trapping behavior, which is a consequence of spatial ordering of the electroactive anions and cations, is observed in cyclic voltammetry of the CME in aqueous KH 2 PO 4 solution. With Ru(bpy) 3 2+ exchanged onto the clay surface, photocathodic currents are generated with a quantum efficiency (per photon absorbed) of ca. 1%. This photocurrent is attributed to electron donor quenching of the Ru(bpy) 3 2+ excited state by Fe(CN) 6 4- or Mo(CN) 8 4- .

Original languageEnglish (US)
Pages (from-to)1531-1535
Number of pages5
JournalInorganic Chemistry
Volume29
Issue number8
DOIs
StatePublished - Jan 1 1990

Fingerprint

photoelectrochemistry
Electrochemistry
electrochemistry
clays
Electrodes
electrodes
Anions
Cations
anions
Bentonite
Silanes
cations
Charge trapping
montmorillonite
Photocurrents
Quantum efficiency
Excited states
silanes
Cyclic voltammetry
photocurrents

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry

Cite this

Rong, Daiting ; Kim, Yeong ; Mallouk, Thomas E. / Electrochemistry and Photoelectrochemistry of Pillared-Clay-Modified Electrodes. In: Inorganic Chemistry. 1990 ; Vol. 29, No. 8. pp. 1531-1535.
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abstract = "Clay-modified electrodes (CME) were made by binding Al 13 O 4 (OH) 28 3+ -pillared montmorillonite to SnO 2 and Pt surfaces via a thin (2-4 monolayer thick) coating of polymerized silane I. The polymer provides a binding site for multiply charged anions [formula-omitted] such as Fe(CN) 6 4- and Mo(CN) 8 4- , while the clay external surface strongly binds large cations such as Os(bpy) 3 2+ and Ru(bpy) 3 2+ . Charge-trapping behavior, which is a consequence of spatial ordering of the electroactive anions and cations, is observed in cyclic voltammetry of the CME in aqueous KH 2 PO 4 solution. With Ru(bpy) 3 2+ exchanged onto the clay surface, photocathodic currents are generated with a quantum efficiency (per photon absorbed) of ca. 1{\%}. This photocurrent is attributed to electron donor quenching of the Ru(bpy) 3 2+ excited state by Fe(CN) 6 4- or Mo(CN) 8 4- .",
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Electrochemistry and Photoelectrochemistry of Pillared-Clay-Modified Electrodes. / Rong, Daiting; Kim, Yeong; Mallouk, Thomas E.

In: Inorganic Chemistry, Vol. 29, No. 8, 01.01.1990, p. 1531-1535.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electrochemistry and Photoelectrochemistry of Pillared-Clay-Modified Electrodes

AU - Rong, Daiting

AU - Kim, Yeong

AU - Mallouk, Thomas E.

PY - 1990/1/1

Y1 - 1990/1/1

N2 - Clay-modified electrodes (CME) were made by binding Al 13 O 4 (OH) 28 3+ -pillared montmorillonite to SnO 2 and Pt surfaces via a thin (2-4 monolayer thick) coating of polymerized silane I. The polymer provides a binding site for multiply charged anions [formula-omitted] such as Fe(CN) 6 4- and Mo(CN) 8 4- , while the clay external surface strongly binds large cations such as Os(bpy) 3 2+ and Ru(bpy) 3 2+ . Charge-trapping behavior, which is a consequence of spatial ordering of the electroactive anions and cations, is observed in cyclic voltammetry of the CME in aqueous KH 2 PO 4 solution. With Ru(bpy) 3 2+ exchanged onto the clay surface, photocathodic currents are generated with a quantum efficiency (per photon absorbed) of ca. 1%. This photocurrent is attributed to electron donor quenching of the Ru(bpy) 3 2+ excited state by Fe(CN) 6 4- or Mo(CN) 8 4- .

AB - Clay-modified electrodes (CME) were made by binding Al 13 O 4 (OH) 28 3+ -pillared montmorillonite to SnO 2 and Pt surfaces via a thin (2-4 monolayer thick) coating of polymerized silane I. The polymer provides a binding site for multiply charged anions [formula-omitted] such as Fe(CN) 6 4- and Mo(CN) 8 4- , while the clay external surface strongly binds large cations such as Os(bpy) 3 2+ and Ru(bpy) 3 2+ . Charge-trapping behavior, which is a consequence of spatial ordering of the electroactive anions and cations, is observed in cyclic voltammetry of the CME in aqueous KH 2 PO 4 solution. With Ru(bpy) 3 2+ exchanged onto the clay surface, photocathodic currents are generated with a quantum efficiency (per photon absorbed) of ca. 1%. This photocurrent is attributed to electron donor quenching of the Ru(bpy) 3 2+ excited state by Fe(CN) 6 4- or Mo(CN) 8 4- .

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