Comparative study of different types of graphenes as electrocatalysts for ascorbic acid
作者： Dimitrios V. Stergiou , Evmorfia K. Diamanti , Dimitrios Gournis , Mamas I. Prodromidis
DOI: 10.1016/J.ELECOM.2010.07.006
关键词:
摘要: Abstract A comparative study regarding the electrocatalytic activity of graphene oxide (GO), chemically-reduced ( cr GO) and produced by direct liquid exfoliation d G) is presented. Sensors were developed modifying glassy carbon (GC) electrodes with GO, GO G ascorbic acid was used as a pilot analyte. GC/GO offer substantially lower oxidation overpotential, up to 350 mV, compared GC/ unmodified GC electrodes. In addition, different carbon-to-oxygen atomic ratios in it occurs depending on synthetic route, found have remarkable effect performance sensors. Reduction achieved immersing modified into stirred solution NaBH 4 for 10 min at room temperature. This process alternatively time consuming laborious hydrazine, its effectiveness confirmed cyclic voltammetry electrochemical impedance spectroscopy. Analytical utility sensors demonstrated.
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