Copper nickel@reduced graphene oxide nanocomposite as bifunctional electro-catalyst for excellent oxygen evolution and oxygen reduction reactions

Abdullah M. Al-Enizi; Mohd Ubaidullah; Jahangeer Ahmed; Hussein Alrobei; Saad M. Alshehri

doi:10.1016/j.matlet.2019.126969

Copper nickel@reduced graphene oxide nanocomposite as bifunctional electro-catalyst for excellent oxygen evolution and oxygen reduction reactions

Abdullah M. Al-Enizi
, Mohd Ubaidullah
, Jahangeer Ahmed
, Hussein Alrobei
, Saad M. Alshehri

Mechanical Engineering

King Saud University

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

25 Scopus citations

Abstract

Herein, we demonstrate that copper nickel (CuNi)@reduced graphene oxide (RGO) nanocomposite (NC) is an excellent bifunctional electro-catalyst to oxygen evolution (OER) and oxygen reduction reactions (ORR). CuNi@RGO-NC shows impressive electro-catalytic activity with fairly low onset over-potentials for OER (~135 mV) and ORR (~60 mV) in alkaline medium. Tafel slopes of CuNi@RGO-NC were found to be ~182 and ~86 mV/dec for OER and ORR, respectively. CuNi@RGO-NC exhibits better retention rate (88%) than CuNi nanoparticles (NPs) and also reveals the comparable OER/ORR activities with expensive electro-catalysts (20% Pt/C).

Original language	English
Article number	126969
Journal	Materials Letters
Volume	260
DOIs	https://doi.org/10.1016/j.matlet.2019.126969
State	Published - 1 Feb 2020

Keywords

CuNi@RGO-NC
Electro-catalysis
Energy storage and conversion
Nanocomposites
Nanoparticles

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10.1016/j.matlet.2019.126969

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@article{78185f24c8ce471e8c89fd30dca88c86,

title = "Copper nickel@reduced graphene oxide nanocomposite as bifunctional electro-catalyst for excellent oxygen evolution and oxygen reduction reactions",

abstract = "Herein, we demonstrate that copper nickel (CuNi)@reduced graphene oxide (RGO) nanocomposite (NC) is an excellent bifunctional electro-catalyst to oxygen evolution (OER) and oxygen reduction reactions (ORR). CuNi@RGO-NC shows impressive electro-catalytic activity with fairly low onset over-potentials for OER (\textasciitilde{}135 mV) and ORR (\textasciitilde{}60 mV) in alkaline medium. Tafel slopes of CuNi@RGO-NC were found to be \textasciitilde{}182 and \textasciitilde{}86 mV/dec for OER and ORR, respectively. CuNi@RGO-NC exhibits better retention rate (88\%) than CuNi nanoparticles (NPs) and also reveals the comparable OER/ORR activities with expensive electro-catalysts (20\% Pt/C).",

keywords = "CuNi@RGO-NC, Electro-catalysis, Energy storage and conversion, Nanocomposites, Nanoparticles",

author = "Al-Enizi, \{Abdullah M.\} and Mohd Ubaidullah and Jahangeer Ahmed and Hussein Alrobei and Alshehri, \{Saad M.\}",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

year = "2020",

month = feb,

day = "1",

doi = "10.1016/j.matlet.2019.126969",

language = "English",

volume = "260",

journal = "Materials Letters",

issn = "0167-577X",

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TY - JOUR

T1 - Copper nickel@reduced graphene oxide nanocomposite as bifunctional electro-catalyst for excellent oxygen evolution and oxygen reduction reactions

AU - Al-Enizi, Abdullah M.

AU - Ubaidullah, Mohd

AU - Ahmed, Jahangeer

AU - Alrobei, Hussein

AU - Alshehri, Saad M.

PY - 2020/2/1

Y1 - 2020/2/1

N2 - Herein, we demonstrate that copper nickel (CuNi)@reduced graphene oxide (RGO) nanocomposite (NC) is an excellent bifunctional electro-catalyst to oxygen evolution (OER) and oxygen reduction reactions (ORR). CuNi@RGO-NC shows impressive electro-catalytic activity with fairly low onset over-potentials for OER (~135 mV) and ORR (~60 mV) in alkaline medium. Tafel slopes of CuNi@RGO-NC were found to be ~182 and ~86 mV/dec for OER and ORR, respectively. CuNi@RGO-NC exhibits better retention rate (88%) than CuNi nanoparticles (NPs) and also reveals the comparable OER/ORR activities with expensive electro-catalysts (20% Pt/C).

AB - Herein, we demonstrate that copper nickel (CuNi)@reduced graphene oxide (RGO) nanocomposite (NC) is an excellent bifunctional electro-catalyst to oxygen evolution (OER) and oxygen reduction reactions (ORR). CuNi@RGO-NC shows impressive electro-catalytic activity with fairly low onset over-potentials for OER (~135 mV) and ORR (~60 mV) in alkaline medium. Tafel slopes of CuNi@RGO-NC were found to be ~182 and ~86 mV/dec for OER and ORR, respectively. CuNi@RGO-NC exhibits better retention rate (88%) than CuNi nanoparticles (NPs) and also reveals the comparable OER/ORR activities with expensive electro-catalysts (20% Pt/C).

KW - CuNi@RGO-NC

KW - Electro-catalysis

KW - Energy storage and conversion

KW - Nanocomposites

KW - Nanoparticles

UR - https://www.scopus.com/pages/publications/85075539100

U2 - 10.1016/j.matlet.2019.126969

DO - 10.1016/j.matlet.2019.126969

M3 - Article

AN - SCOPUS:85075539100

SN - 0167-577X

VL - 260

JO - Materials Letters

JF - Materials Letters

M1 - 126969

ER -

Copper nickel@reduced graphene oxide nanocomposite as bifunctional electro-catalyst for excellent oxygen evolution and oxygen reduction reactions

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Keywords

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