One-step electrodeposition of carbon-silicate sponge assisted by a three-phase junction for efficient bioelectrocatalysis

作者：Szot Katarzyna; Joensson Niedziolka Martin; Palys Barbara; Niedziolka Joensson Joanna^*

来源：Electrochemistry Communications, 2011, 13(6): 566-569.

DOI：10.1016/j.elecom.2011.03.011

• Electrodeposition
• Three-phase junction
• Carbon-silicate nanocomposite
• Enzyme
• Bioelectrocatalysis

Single-step electrodeposition of nanocomposite silicate materials based on hydrophilic carbon nanoparticles (CNPs) and a hydrophobic sal-gel precursor with the help of an electrode vertical bar organic-phase vertical bar aqueous-electrolyte three-phase junction is presented. A tin-doped indium oxide electrode is immersed into a cell filled with two immiscible liquids. The upper aqueous phase contains dispersed carbon nanoparticles in electrolyte and the bottom organic phase consists of sol-gel precursor in nitrobenzene. Applying a positive potential to the electrode results in generation of protons which act as catalyst for the sol-gel process. A 1625 +/- 140 nm thick, sponge-like. nanoparticulate stripe of CNPs embedded in a silicate matrix is formed at the electrode surface close to the three-phase junction. The obtained material is an excellent support for enzyme adsorption exhibiting mediatorless bioelectrocatalysis of dioxygen reduction.

• 出版日期2011-6