Nickel oxide nanocatalyst obtained by a combined sol-gel and hydrothermal method for oxygen evolution reaction

被引：2
|
作者：
Raimundo, Rafael A. [1 ]
Silva, Thayse R. [2 ]
Santos, Jakeline R. D. [3 ]
Araujo, Allan J. M. [4 ,5 ]
Oliveira, Joao F. G. A. [1 ]
Morales, Marco A. [6 ]
Soares, Marcio M. [1 ]
Macedo, Daniel A. [2 ]
机构：
[1] Univ Fed Paraiba, Dept Phys, BR-58051900 Joao Pessoa, Brazil
[2] Univ Fed Paraiba, Dept Mat Sci & Engn, BR-58051900 Joao Pessoa, Brazil
[3] Univ Fed Rio Grande do Norte, Dept Mat Sci & Engn, BR-59078970 Natal, Brazil
[4] UA, Ctr Mech Technol & Automat, Mech Engn Dept, P-3810193 Aveiro, Portugal
[5] LASI Intelligent Syst Associate Lab, Coimbra, Portugal
[6] Univ Fed Rio Grande do Norte, Dept Theoret & Expt Phys, BR-59078970 Natal, Brazil
来源：
MRS COMMUNICATIONS | 2023年 / 13卷 / 02期
关键词：
Sol-gel; Hydrothermal; ELECTRODE; NIO; FILMS;
D O I：
10.1557/s43579-023-00340-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Nickel oxide nanoparticles with a crystallite size of 4 nm were prepared by a two-step proteic sol-gel and hydrothermal method and evaluated as catalyst for oxygen evolution reaction. The nanocatalyst was characterized by using XRD, FT-IR, RAMAN, and UV-VIS techniques and electrochemically by linear scanning voltammetry (LSV), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The electrode prepared with the NiO nanoparticles showed an overpotential of 335 mV at 10 mA cm(-2), Tafel slope of 136 mV dec(-1), C-DL of 4.08 mF, ECSA of 102 cm(2), specific activity of 4.7 mA cm(- 2), and mass activity of 1600 A g(-1).
引用
收藏
页码：276 / 282
页数：7
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