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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 873Galvanostatic Deposition of PT Nanoparticles on...

Galvanostatic Deposition of PT Nanoparticles on TiO₂ Nanotube Arrays for Amperometric Detection of Hydrogen Peroxide at Low Overpotentials

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Abstract:

Highly ordered TiO₂ nanotube arrays (NTAs) modified with Pt nanoparticles (Pt/TiO₂ NTAs) have been prepared by anodization of Ti foils followed by electrochemical deposition and employed to improve the performance of the low-overpotential determination of H₂O₂ in solution. Morphologies of TiO₂ and Pt/TiO₂ NTAs were observed by SEM and TEM. The electrochemical behaviors of TiO₂ and Pt/TiO₂ NTAs were compared by cyclic voltammograms (CVs) in phosphate buffer solutions in absence and prensence of 10 mM H₂O₂, which showed that Pt nanoparticles can enhance the electrochemical activities of TiO₂ NTAs and achieve low-overpotential determination of H₂O₂. Amperometric method with an applied potential of-100 mV was used for H₂O₂ detemination, which demonstrated a good H₂O₂ sensing with sensitivity of 5.4 μAcm^-2mM^-1.

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The Eighth China National Conference on Functional Materials and Applications

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Periodical:

Advanced Materials Research (Volume 873)

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174-182

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https://doi.org/10.4028/www.scientific.net/AMR.873.174

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Online since:

December 2013

Authors:

Jia Qin Liu*, Li Li Ruan, Guang Qing Xu, Jun Lv, Yu Cheng Wu

Keywords:

Amperometric Method, H₂O₂ Detection, Low Overpotential, Pt Nanoparticle, TiO₂ Nanotube Array (TNAs)

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© 2014 Trans Tech Publications Ltd. All Rights Reserved

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