Vectorial electron transport at ion-exchanged zeolite-Y-modified electrodes

Zhuyin Li, Thomas E. Mallouk

Research output: Contribution to journalArticle

94 Citations (Scopus)

Abstract

Chemically modified SnO2 electrodes were prepared, using zeolite Y which had been ion-exchanged with a metal tris(bipyridyl) complex, M(bpy)3 2+ (M = Ru, Os), and a metallocene cation, M(CpR)2 + or M(Cp)(CpR)+ (M = Co, Fe; Cp = η5-cyclopentadienyl; R = -H, -CH3, -NH2, -COOCH3, -CH2N(CH3)3). The rate of charge transfer between the electrode and the metallocene contained within the zeolite is enhanced at least tenfold by adsorbing M(bpy)3 2+ onto the zeolite surface. Both oxidation and reduction of the metallocene are facile if the potentials of the M(bpy)3 2+ and M(CpR)2 + couples are matched, but only one of these processes occurs if the potentials are dissimilar. This behavior is attributed to a rapid electron-transfer cross reaction between the two complexes. The equilibrium potentials of the zeolite-bound M(CpR)2 +/0 couples were found to be 300-600-mV positive of the corresponding potentials in polar organic solvents. The charge transport diffusion coefficient for Co(CpCH3)2 +/0 in zeolite Y, from linear sweep voltammetry, was found to be ca. 2 × 10-10 cm2/s.

Original languageEnglish (US)
Pages (from-to)643-648
Number of pages6
JournalJournal of Physical Chemistry
Volume91
Issue number3
DOIs
StatePublished - Jan 1 1987

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Zeolites
Charge transfer
Ions
Electrodes
electrodes
Voltammetry
Organic solvents
ions
electrons
Positive ions
Oxidation
Electrons
Metals
2,2'-Dipyridyl
electron transfer
diffusion coefficient
charge transfer
Cations
cations
oxidation

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physical and Theoretical Chemistry

Cite this

Li, Zhuyin ; Mallouk, Thomas E. / Vectorial electron transport at ion-exchanged zeolite-Y-modified electrodes. In: Journal of Physical Chemistry. 1987 ; Vol. 91, No. 3. pp. 643-648.
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Vectorial electron transport at ion-exchanged zeolite-Y-modified electrodes. / Li, Zhuyin; Mallouk, Thomas E.

In: Journal of Physical Chemistry, Vol. 91, No. 3, 01.01.1987, p. 643-648.

Research output: Contribution to journalArticle

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