Research

Electrocatalytic oxidation of nitric oxide at TiO2-Au nanocomposite film electrodes


Reference:

Milsom, E. V., Novak, J., Oyama, M. and Marken, F., 2007. Electrocatalytic oxidation of nitric oxide at TiO2-Au nanocomposite film electrodes. Electrochemistry Communications, 9 (3), pp. 436-442.

Related documents:

This repository does not currently have the full-text of this item.
You may be able to access a copy if URLs are provided below.

Abstract

Structured films of TiO2 (anatase) nanoparticles (ca. 6 nm diameter) and gold nanoparticles (nominal 20 nm diameter) are formed via a layer-by-layer deposition procedure. TiO2 nanoparticles are deposited with a Nafion polyelectrolyte binder followed by calcination to give a mesoporous thin film electrode. Gold nanoparticles are incorporated into this film employing a poly(diallyldimethylammonium chloride) polyclectrolyte binder followed by calcination to give a stable mesoporous TiO2-gold nanocomposite. This methodology allows well-defined and structured films to be formed which are re-usable after a 500 degrees C heat treatment in air. Electrochemical experiments are performed in aqueous KCl and buffer solutions and for the oxidation of nitric oxide, NO, and nitrite in phosphate buffer solution. It is shown that the NO oxidation occurs as a highly effective electrocatalytically amplified process at the surface of the gold nanocomposite probably with co-evolution of oxygen, O-2. In Contrast, the oxidation of nitrite to nitrate occurs at the same potential but without oxygen evolution. A mechanistic scheme for the amplified NO detection process is proposed. (c) 2006 Elsevier B.V. All rights reserved.

Details

Item Type Articles
CreatorsMilsom, E. V., Novak, J., Oyama, M. and Marken, F.
DOI10.1016/j.elecom.2006.10.018
DepartmentsFaculty of Science > Chemistry
RefereedYes
StatusPublished
ID Code4566
Additional InformationID number: ISI:000245478400016

Export

Actions (login required)

View Item