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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Peak current-scan rate1/2 responses of the FTO (A), Au/FTO (B), 3D Au-rGO/FTO (C) in K3Fe(CN)6 (insets show the CVs of the corresponding electrode at different scanning rates in K3Fe(CN)6), CVs of FTO, Au/FTO and 3D Au-rGO/FTO recorded in K3Fe(CN)6 (D).