Microchimica Acta

, Volume 165, Issue 3, pp 381–386

Electrocatalytic activity of a novel titanium-supported nanoporous gold catalyst for glucose oxidation

Original Paper

DOI: 10.1007/s00604-009-0148-0

Cite this article as:
Yi, Q. & Yu, W. Microchim Acta (2009) 165: 381. doi:10.1007/s00604-009-0148-0

Abstract

A novel Ti-supported gold catalyst (nanoAu/Ti) with a nanoporous 3D texture has been fabricated using a hydrothermal method. Au particles were stably deposited on the Ti surface from the mixture of aqueous tetrachlororoauric acid and polyethylene glycol at 180 °C. Voltammetry (CV) and chronoamperometry were used to characterize the nanoAu/Ti electrode and assess its electroactivity towards glucose oxidation. Compared to polycrystalline Au, the nanoAu/Ti electrode shows similar CV profiles in alkaline solution. However, in an alkaline solution containing 10 mM glucose, the nanoAu/Ti electrode presents much higher anodic current densities and a more negative onset potential (ca. −0.75 V) for glucose oxidation than a bulk Au electrode. Analysis for Tafel plot of the nanoAu/Ti electrode shows that electro-oxidation of glucose takes place via a one-electron rate-determining step. Results indicate a high and (relatively) stable electrocatalytic activity of the nanoAu/Ti for glucose oxidation.

Keywords

Gold nanoparticle Glucose oxidation Catalysts Hydrothermal method 

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  1. 1.School of Chemistry and Chemical EngineeringHunan University of Science and TechnologyXiangtanChina

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