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Journal Article

Electrocatalytic Reduction of Peroxodisulfate in 0.5 M NaOH at Copper Electrodes. A Combined Quartz Microbalance and Rotating Ring/Disc Electrode Investigation

MPS-Authors
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Härtinger,  Stefan
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Rosenmund,  Jürgen
Fritz Haber Institute, Max Planck Society;

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Savinova,  Elena R.
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Wasle,  Sabine
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Doblhofer,  Karl
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Härtinger, S., Rosenmund, J., Savinova, E. R., Wasle, S., & Doblhofer, K. (1997). Electrocatalytic Reduction of Peroxodisulfate in 0.5 M NaOH at Copper Electrodes. A Combined Quartz Microbalance and Rotating Ring/Disc Electrode Investigation. The Journal of Physical Chemistry B, 101(14), 2411-2414. doi:10.1021/jp9627279.


Cite as: https://hdl.handle.net/21.11116/0000-0008-A19E-0
Abstract
From an electrochemical investigation by means of an electrochemical quartz microbalance, a rotating disc electrode, and a ring/disc electrode, two mechanisms for the reduction of S2O82- became apparent. Besides the well-known outer-sphere cathodic reduction, a catalytic mechanism of S2O82- reduction operates in a potential range between the surface oxide region (≈-0.5 V/SCE) and -1.0 V/SCE. It involves the chemical
oxidation of the copper surface to a soluble Cu(I) species. The catalytic mechanism is concluded to result from the specific interaction between S2O82- and the Cu surface modified by the presence of subsurface
oxygen.