Theory and experiment on the cuprous{endash}cupric electron transfer rate at a copper electrode

Journal Article · Thu Apr 01 04:00:00 EST 1999 · Journal of Chemical Physics

DOI:https://doi.org/10.1063/1.478557· OSTI ID:335572

Halley, J W ^[1]; Smith, B B ^[2]; Walbran, S ^[1]; Curtiss, L A; Rigney, R O; Sutjianto, A; Hung, N C; Yonco, R M; Nagy, Z ^[3]

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1. School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
2. National Renewable Energy Laboratory, Golden, Colorado (United States)
3. Argonne National Laboratory, Divisions of Materials Science, Chemistry and Chemical Technology, Argonne, Illinois 60439-4837 (United States)

We describe results of experiment and theory of the cuprous{endash}cupric electron transfer rate in an aqueous solution at a copper electrode. The methods are similar to those we reported earlier for the ferrous{endash}ferric rate. The comparison strongly suggests that, in marked distinction to the ferrous{endash}ferric case, the electron transfer reaction is adiabatic. The model shows that the activation barrier is dominated by the energy required for the ion to approach the electrode, rather than by the energy required for rearrangement of the solvation shell, also in sharp distinction to the case of the ferric{endash}ferrous electron transfer at a gold electrode. Calculated activation barriers based on this image agree with the experimental results reported here. {copyright} {ital 1999 American Institute of Physics.}

• OSTI ID: 335572
• Journal Information: Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 13 Vol. 110; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
AQUEOUS SOLUTIONS
CHEMICAL REACTION KINETICS
COPPER
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTES
ELECTRON TRANSFER
FREE ENERGY
OXIDATION
REACTION KINETICS