A Facile Controlled-Synthesis Method of Nanoparticles of Nickel Oxide/Hydroxide Anchored in Graphite/RGO for Alcohol Oxidation

Author(s)

de Oliveira, Joao P. J. ^[1] ; de Sa, Acelino C. ^[2] ; Sousa, Miguel S. P. ^[1] ; Hiranobe, Carlos T. ^[1] ; Paim, Leonardo L. ^[1]

Affiliation

^[1] Sao Paulo State Univ Unesp, Engn Energy, Campus Rosana, BR-19274000 Rosana, SP - Brazil

^[2] Univ Sao Paulo, Inst Phys Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY; v. 10, n. 1 JAN 1 2021.
• Web of Science Citations: 0

Abstract

Composites graphite/reduced graphene oxide electrodes modified with nickel oxy-hydroxide nanoparticles electrodeposited onto electrode surface were developed and applied for the oxidation of ethanol and 2-propanol in alkaline medium. Ni(OH)(2) nanoparticles was electrosynthesized in two steps by cyclic voltammetry. Firstly, nickel(II) hexacyanoferrate nanoparticles were electrodeposited, and subsequently Ni(OH)(2) was performed in 0.50 mol l(-1) NaOH solution. This facile controlled-synthesis method for electrosynthesis of Ni(OH)(2) nanoparticles has excellent reproducibility in the manufacture of the modified electrodes. The composite electrodes were characterized by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), field emission gun scanning electron microscopy (FEG-SEM). Electrooxidation of ethanol and propanol were performed in an alkaline medium, and composite electrode modified with Ni(OH)(2) nanoparticles promoted the alcohols electrooxidation. The electrodes showed a linear current relationship as a function of the concentration of the alcohols, and the current density obtained by cyclic voltammetry (50 mV s(-1)) for ethanol was 6.6 mA cm(-2) and for 2-propanol was 13.1 mA cm(-2) in a solution of 0.1 mol l(-1) of NaOH. (AU)

• FAPESP's process: 17/09123-9 - Development of composite sensors for the direct detection of carbohydrates and phenolic compounds derived from the acid hydrolysis process of sugarcane lignocellulosic materials
• Grantee: Leonardo Lataro Paim
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Regular Program Grants
• FAPESP's process: 17/17559-1 - Determination of glycerol in biodiesel samples by composite electrodes modified with NiO(OH) nanoparticles anchored in graphene
• Grantee: João Pedro Jenson de Oliveira
• Support Opportunities: Scholarships in Brazil - Scientific Initiation