Theory and experiment on the cuprous-cupric electron transfer rate at a copper electrode.

Journal Article · Thu Apr 01 04:00:00 EST 1999 · J. Chem. Phys.

DOI:https://doi.org/10.1063/1.478557· OSTI ID:942422

Halley, J W; Smith, B B; Walbran, S; Curtiss, L A; Rigney, R O; Sutjianto, A; Hung, N C; Yonco, R M; Nagy, Z; NREL,

We describe results of experiment and theory of the cuprous-cupric electron transfer rate in an aqueous solution at a copper electrode. The methods are similar to those we reported earlier for the ferrous-ferric rate. The comparison strongly suggests that, in marked distinction to the ferrous-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-ferrous electron transfer at a gold electrode. Calculated activation barriers based on this image agree with the experimental results reported here.

• Research Organization: Argonne National Laboratory (ANL)
• Sponsoring Organization: ER
• DOE Contract Number: AC02-06CH11357
• OSTI ID: 942422
• Report Number(s): ANL/MSD/JA-31245
• Journal Information: J. Chem. Phys., Journal Name: J. Chem. Phys. Journal Issue: 13 ; Apr. 1999 Vol. 110; ISSN JCPSA6; ISSN 0021-9606
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ACTIVATION ENERGY
AQUEOUS SOLUTIONS
COPPER
ELECTRODES
ELECTRON TRANSFER
KINETICS
VALENCE