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Proceeding Paper

NiOOH/FeOOH Supported on Reduced Graphene Oxide Composite Electrodes for Ethanol Electrooxidation †

1
Engineering of Energy, Campus of Rosana, São Paulo State University, Rosana 192740-000, São Paulo, Brazil
2
Institute of Physics, University of São Paulo, São Carlos 13566-590, São Paulo, Brazil
3
Centre of Physics and Technological Research (CEFITEC), Physics Department, Faculty of Science and Technology, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
*
Author to whom correspondence should be addressed.
Presented at the 2nd Coatings and Interfaces Web Conference, 15–31 May 2020; Available online: https://ciwc2020.sciforum.net/.
Mater. Proc. 2020, 2(1), 17; https://doi.org/10.3390/CIWC2020-06840
Published: 14 May 2020
(This article belongs to the Proceedings of 2nd Coatings and Interfaces Web Conference (CIWC-2 2020))
In this work, nickel (Ni) and Ni-Fe bimetallic microparticles were electrosynthesized at reduction potentials in the range from −0.70 V to −1.20 V (50 mV s−1) by cyclic voltammetry (CV) onto graphite/paraffin electrode surface modified with nanosheets of reduced graphene oxide (RGO). Previously, the RGO was electrodeposited by CV from a suspension of 1 mg mL−1 of graphene oxide in PBS solution with pH 9.18, in the potential range from −1.50 V to 0.50 V (10 mV s−1). After electrodeposition of metals, the oxyhydroxides were formed by CV in an alkaline medium of 0.10 mol L−1 of NaOH in the potential range from −0.20 V to 1.0 V (100 mV s−1) with successive scans until stabilization of currents. In order to characterize the developed electrodes composites, the surfaces were investigated by scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). Electrochemical performance of the developed electrodes composites to ethanol electrooxidation was carried out in an alkaline medium of 0.10 mol L−1 of NaOH in the potential range from −0.20 V to 1.0 V (100 mV s−1) by CV. The electrodes were able to induce the electrooxidation of ethanol at a potential of 0.55 V for the electrode made of NiOOH/FeOOH and around of 0.60 V for the electrode modified with NiOOH.
Keywords: composite; RGO; oxyhydroxide; ethanol; electrooxidation composite; RGO; oxyhydroxide; ethanol; electrooxidation
MDPI and ACS Style

Oliveira, J.P.J.d.; Sá, A.C.d.; Paim, L.L. NiOOH/FeOOH Supported on Reduced Graphene Oxide Composite Electrodes for Ethanol Electrooxidation. Mater. Proc. 2020, 2, 17. https://doi.org/10.3390/CIWC2020-06840

AMA Style

Oliveira JPJd, Sá ACd, Paim LL. NiOOH/FeOOH Supported on Reduced Graphene Oxide Composite Electrodes for Ethanol Electrooxidation. Materials Proceedings. 2020; 2(1):17. https://doi.org/10.3390/CIWC2020-06840

Chicago/Turabian Style

Oliveira, João Pedro Jenson de, Acelino Cardoso de Sá, and Leonardo Lataro Paim. 2020. "NiOOH/FeOOH Supported on Reduced Graphene Oxide Composite Electrodes for Ethanol Electrooxidation" Materials Proceedings 2, no. 1: 17. https://doi.org/10.3390/CIWC2020-06840

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