Electrocatalytic performance evaluation of cobalt hydroxide and cobalt oxide thin films for oxygen evolution reaction

Electrocatalytic performance evaluation of cobalt hydroxide and cobalt oxide thin films for... Article history: The development of an inexpensive, stable, and highly active electrocatalyst for oxygen evolution reaction Received 29 April 2017 (OER) is essential for the practical application of water splitting. Herein, we have synthesized an electrode- Received in revised form 13 July 2017 ◦ posited cobalt hydroxide on nickel foam and subsequently annealed in an air atmosphere at 400 C for Accepted 17 July 2017 2 h. In-depth characterization of all the films using X-ray diffraction (XRD), X-ray photoelectron emission Available online 17 July 2017 spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV) techniques, which reveals major changes for Keywords: their structural, morphological, compositional and electrochemical properties, respectively. The cobalt Cobalt hydroxide/oxide −2 hydroxide nanosheet film shows high catalytic activity with 290 mV overpotential at 10 mA cm and Electrocatalyst −1 91 mV dec Tafel slope and robust stability (24 h) for OER in 1 M KOH electrolyte compared to cobalt Electrodeposition oxide (340 mV). The better OER activity of cobalt hydroxide in comparison to cobalt oxide originated Oxygen evolution reaction Linear sweep voltammetry from high active sites, enhanced surface, and charge transport capability. © 2017 Elsevier B.V. All rights http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Applied Surface Science Elsevier

Electrocatalytic performance evaluation of cobalt hydroxide and cobalt oxide thin films for oxygen evolution reaction

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier B.V.
ISSN
0169-4332
eISSN
1873-5584
D.O.I.
10.1016/j.apsusc.2017.07.142
Publisher site
See Article on Publisher Site

Abstract

Article history: The development of an inexpensive, stable, and highly active electrocatalyst for oxygen evolution reaction Received 29 April 2017 (OER) is essential for the practical application of water splitting. Herein, we have synthesized an electrode- Received in revised form 13 July 2017 ◦ posited cobalt hydroxide on nickel foam and subsequently annealed in an air atmosphere at 400 C for Accepted 17 July 2017 2 h. In-depth characterization of all the films using X-ray diffraction (XRD), X-ray photoelectron emission Available online 17 July 2017 spectroscopy (XPS), field emission scanning electron microscopy (FE-SEM), electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV) techniques, which reveals major changes for Keywords: their structural, morphological, compositional and electrochemical properties, respectively. The cobalt Cobalt hydroxide/oxide −2 hydroxide nanosheet film shows high catalytic activity with 290 mV overpotential at 10 mA cm and Electrocatalyst −1 91 mV dec Tafel slope and robust stability (24 h) for OER in 1 M KOH electrolyte compared to cobalt Electrodeposition oxide (340 mV). The better OER activity of cobalt hydroxide in comparison to cobalt oxide originated Oxygen evolution reaction Linear sweep voltammetry from high active sites, enhanced surface, and charge transport capability. © 2017 Elsevier B.V. All rights

Journal

Applied Surface ScienceElsevier

Published: Jan 1, 2018

References

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