Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 11, Issue 2, Pages 473-476Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.12.020
Keywords
Scanning electrochemical microscopy; Liquid/liquid interface; Oxygen reduction reaction; H2O2 production; Substrate generation/tip collection
Categories
Funding
- EPFL
- Swiss Natural Foundation [FNRS 200020-116588]
- European COST [D36/007/06]
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Scanning electrochemical microscopy (SECM) was used to monitor in situ hydrogen peroxide (H2O2) produced at a polarized water/1,2-dichloroethane (DCE) interface. The water/DCE interface was formed between a DCE droplet containing decamethylferrocene (DMFc) supported on a solid electrode and an acidic aqueous solution. H2O2 was generated by reducing oxygen with DMFc at the water/DCE interface, and was detected with a SECM tip positioned in the vicinity of the interface using a substrate generation/tip collection mode. This work shows unambiguously how the H2O2 generation depends on the polarization of the liquid/liquid interface, and how proton-coupled electron transfer reactions can be controlled at liquid/liquid interfaces. (C) 2008 Elsevier B.V. All rights reserved.
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