Graphene-supported Co(OH)2 mesostructures for ethanol oxidation reaction electrocatalysis

D. Khallafallah Hassen; M. M. Selim; S. A. El-Safty; Khalil Abdelrazek Khalil; G. Abu el-Maged; M. Dewidar

doi:10.1016/j.nanoso.2016.12.004

Graphene-supported Co(OH)₂ mesostructures for ethanol oxidation reaction electrocatalysis

D. Khallafallah Hassen
, M. M. Selim
, S. A. El-Safty
, Khalil Abdelrazek Khalil
, G. Abu el-Maged
, M. Dewidar

Mathematics

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

Developing efficient electrocatalysts for practical applications in energy conversion and storage systems is receiving considerable attention. In the present study, graphene oxide supported cobalt hydroxide (GO/Co(OH)₂) hybrid was developed by a facile surfactant-assisted hydrothermal method as an electrocatalyst for ethanol oxidation reaction. Electrochemical performance was evaluated in N₂-saturated 0.5 M KOH solution. The hybrid exhibits excellent electrocatalytic activity and significantly remarkable electrochemical long-term stability for ethanol oxidation. Results show that the hybrid displays a current density of approximately 89.4% of its original value after 40,000 s of continuous operation. The improved electroactivity of the as-obtained GO/Co(OH)₂ for ethanol oxidation is attributed to the synergistic effects of Co(OH)₂ particles and graphene oxide (GO) sheets. More importantly, the embedded GO sheets enhance the electrical conductivity of Co(OH)₂ and facilitate the electron mobility along the electrode surfaces. The simple and cost-effective preparation procedure and enhanced electrocatalytic features of the 3-D GO/Co(OH)₂ electrocatalyst indicate its potential application in fuel cells.

Original language	English
Pages (from-to)	31-39
Number of pages	9
Journal	Nano-Structures and Nano-Objects
Volume	9
DOIs	https://doi.org/10.1016/j.nanoso.2016.12.004
State	Published - 1 Feb 2017

Keywords

3-D flower
Ethanol oxidation
GO/Co(OH) mesostructures
Hydrothermal method

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.nanoso.2016.12.004

Cite this

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title = "Graphene-supported Co(OH)2 mesostructures for ethanol oxidation reaction electrocatalysis",

abstract = "Developing efficient electrocatalysts for practical applications in energy conversion and storage systems is receiving considerable attention. In the present study, graphene oxide supported cobalt hydroxide (GO/Co(OH)2) hybrid was developed by a facile surfactant-assisted hydrothermal method as an electrocatalyst for ethanol oxidation reaction. Electrochemical performance was evaluated in N2-saturated 0.5 M KOH solution. The hybrid exhibits excellent electrocatalytic activity and significantly remarkable electrochemical long-term stability for ethanol oxidation. Results show that the hybrid displays a current density of approximately 89.4\% of its original value after 40,000 s of continuous operation. The improved electroactivity of the as-obtained GO/Co(OH)2 for ethanol oxidation is attributed to the synergistic effects of Co(OH)2 particles and graphene oxide (GO) sheets. More importantly, the embedded GO sheets enhance the electrical conductivity of Co(OH)2 and facilitate the electron mobility along the electrode surfaces. The simple and cost-effective preparation procedure and enhanced electrocatalytic features of the 3-D GO/Co(OH)2 electrocatalyst indicate its potential application in fuel cells.",

keywords = "3-D flower, Ethanol oxidation, GO/Co(OH) mesostructures, Hydrothermal method",

author = "\{Khallafallah Hassen\}, D. and Selim, \{M. M.\} and El-Safty, \{S. A.\} and Khalil, \{Khalil Abdelrazek\} and \{Abu el-Maged\}, G. and M. Dewidar",

note = "Publisher Copyright: {\textcopyright} 2016",

year = "2017",

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doi = "10.1016/j.nanoso.2016.12.004",

language = "English",

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T1 - Graphene-supported Co(OH)2 mesostructures for ethanol oxidation reaction electrocatalysis

AU - Khallafallah Hassen, D.

AU - Selim, M. M.

AU - El-Safty, S. A.

AU - Khalil, Khalil Abdelrazek

AU - Abu el-Maged, G.

AU - Dewidar, M.

PY - 2017/2/1

Y1 - 2017/2/1

N2 - Developing efficient electrocatalysts for practical applications in energy conversion and storage systems is receiving considerable attention. In the present study, graphene oxide supported cobalt hydroxide (GO/Co(OH)2) hybrid was developed by a facile surfactant-assisted hydrothermal method as an electrocatalyst for ethanol oxidation reaction. Electrochemical performance was evaluated in N2-saturated 0.5 M KOH solution. The hybrid exhibits excellent electrocatalytic activity and significantly remarkable electrochemical long-term stability for ethanol oxidation. Results show that the hybrid displays a current density of approximately 89.4% of its original value after 40,000 s of continuous operation. The improved electroactivity of the as-obtained GO/Co(OH)2 for ethanol oxidation is attributed to the synergistic effects of Co(OH)2 particles and graphene oxide (GO) sheets. More importantly, the embedded GO sheets enhance the electrical conductivity of Co(OH)2 and facilitate the electron mobility along the electrode surfaces. The simple and cost-effective preparation procedure and enhanced electrocatalytic features of the 3-D GO/Co(OH)2 electrocatalyst indicate its potential application in fuel cells.

AB - Developing efficient electrocatalysts for practical applications in energy conversion and storage systems is receiving considerable attention. In the present study, graphene oxide supported cobalt hydroxide (GO/Co(OH)2) hybrid was developed by a facile surfactant-assisted hydrothermal method as an electrocatalyst for ethanol oxidation reaction. Electrochemical performance was evaluated in N2-saturated 0.5 M KOH solution. The hybrid exhibits excellent electrocatalytic activity and significantly remarkable electrochemical long-term stability for ethanol oxidation. Results show that the hybrid displays a current density of approximately 89.4% of its original value after 40,000 s of continuous operation. The improved electroactivity of the as-obtained GO/Co(OH)2 for ethanol oxidation is attributed to the synergistic effects of Co(OH)2 particles and graphene oxide (GO) sheets. More importantly, the embedded GO sheets enhance the electrical conductivity of Co(OH)2 and facilitate the electron mobility along the electrode surfaces. The simple and cost-effective preparation procedure and enhanced electrocatalytic features of the 3-D GO/Co(OH)2 electrocatalyst indicate its potential application in fuel cells.

KW - 3-D flower

KW - Ethanol oxidation

KW - GO/Co(OH) mesostructures

KW - Hydrothermal method

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