Nanostructured cerium oxide catalyst support: Effects of morphology on the electroactivity of gold toward oxidative sensing of glucose

Autor:	Dongling Ma, Mohamed Mohamedi, Amel Tabet-Aoul, Maxime Gougis
Rok vydání:	2014
Předmět:	Cerium oxide Materials science X-ray photoelectron spectroscopy Scanning electron microscope Catalyst support Electrode Inorganic chemistry Cyclic voltammetry Electrochemistry Voltammetry Analytical Chemistry
Zdroj:	Microchimica Acta. 181:1207-1214
ISSN:	1436-5073 0026-3672
DOI:	10.1007/s00604-014-1283-9
Popis:	We report on the fabrication of nanostructured CeO2-gold electrodes by means of laser ablation. The synthetic conditions were varied in order to obtain different morphologies of CeO2. The physical and chemical properties of the samples were studied by scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The effect of the morphology of CeO2 on the electrocatalytic oxidation of glucose were studied by cyclic voltammetry and square-wave voltammetry. Among the various electrodes fabricated, the CeO2 coating produced under 10 mTorr of oxygen showed the best supporting catalytic properties for gold by displaying 44 μA cm−2 mM−1 sensitivity for glucose oxidation at near neutral pH values. The detection limit is as low as 10 μM. This electrochemical activity makes the optimized nanostructured electrode potentially useful for non-enzymatic sensing of glucose.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a983628a885339a2fd804cf143f50644 https://doi.org/10.1007/s00604-014-1283-9 Zobrazit plný text záznamu Plný text ve formátu PDF