Detection of hydrogen peroxide produced at a liquid/liquid interface using scanning electrochemical microscopy

作者：Li Fei; Su Bin; Salazar Fernando Cortes; Nia Raheleh Partovi; Girault Hubert H^*

来源：Electrochemistry Communications, 2009, 11(2): 473-476.

DOI：10.1016/j.elecom.2008.12.020

• Scanning electrochemical microscopy
• Liquid/liquid interface
• Oxygen reduction reaction
• H(2)O(2) production
• Substrate generation/tip collection

Scanning electrochemical microscopy (SECM) was used to monitor in situ hydrogen peroxide (H(2)O(2)) 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. H(2)O(2) 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 H(2)O(2) generation depends on the polarization of the liquid/liquid interface, and how proton-coupled electron transfer reactions can be controlled at liquid/liquid interfaces.

• 出版日期2009-2