Hexagonal NiO nanosheets on Ni-foam as an electrocatalyst for high-performance water splitting application

Rajneesh Kumar Mishra; Vipin Kumar; Gyu Jin Choi; Jeong Won Ryu; Sagar M. Mane; Jae Cheol Shin; Jin Seog Gwag

doi:10.1016/j.matlet.2022.132740

Hexagonal NiO nanosheets on Ni-foam as an electrocatalyst for high-performance water splitting application

Rajneesh Kumar Mishra
, Vipin Kumar
, Gyu Jin Choi
, Jeong Won Ryu
, Sagar M. Mane
, Jae Cheol Shin
, Jin Seog Gwag

Department of Electronics & Electrical Engineering

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

20 Scopus citations

Abstract

This study illustrates the catalytic hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities of the hexagonal NiO nanosheets on Ni-foam. The NiO electrocatalyst demonstrates the low overpotentials of 83 mV/380 mV and low Tafel slopes of 209 mV dec⁻¹/299 mV dec⁻¹ during HER/OER, respectively. It also reveals excellent stability, showing a slight change in overpotentials of 116 mV and 430 mV during HER/OER after 2000 CV cycles. Electrochemical impedance spectroscopy spectra show the series resistance of 0.83 Ω/1.04 Ω and charge-transfer resistance of 1.63 Ω/4.70 Ω during HER/OER after 2000 CV cycles.

Original language	English
Article number	132740
Journal	Materials Letters
Volume	324
DOIs	https://doi.org/10.1016/j.matlet.2022.132740
State	Published - 1 Oct 2022

UN SDGs

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

SDG 7 Affordable and Clean Energy

Keywords

Hexagonal NiO nanosheets
Hydrogen evolution reaction
Oxygen evolution reaction
Stability
Water splitting

Access to Document

10.1016/j.matlet.2022.132740

Cite this

@article{990df0fb23624544b7a3becc3083b02a,

title = "Hexagonal NiO nanosheets on Ni-foam as an electrocatalyst for high-performance water splitting application",

abstract = "This study illustrates the catalytic hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities of the hexagonal NiO nanosheets on Ni-foam. The NiO electrocatalyst demonstrates the low overpotentials of 83 mV/380 mV and low Tafel slopes of 209 mV dec−1/299 mV dec−1 during HER/OER, respectively. It also reveals excellent stability, showing a slight change in overpotentials of 116 mV and 430 mV during HER/OER after 2000 CV cycles. Electrochemical impedance spectroscopy spectra show the series resistance of 0.83 Ω/1.04 Ω and charge-transfer resistance of 1.63 Ω/4.70 Ω during HER/OER after 2000 CV cycles.",

keywords = "Hexagonal NiO nanosheets, Hydrogen evolution reaction, Oxygen evolution reaction, Stability, Water splitting",

author = "Mishra, \{Rajneesh Kumar\} and Vipin Kumar and Choi, \{Gyu Jin\} and Ryu, \{Jeong Won\} and Mane, \{Sagar M.\} and Shin, \{Jae Cheol\} and Gwag, \{Jin Seog\}",

note = "Publisher Copyright: {\textcopyright} 2022 Elsevier B.V.",

year = "2022",

month = oct,

day = "1",

doi = "10.1016/j.matlet.2022.132740",

language = "English",

volume = "324",

journal = "Materials Letters",

issn = "0167-577X",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Hexagonal NiO nanosheets on Ni-foam as an electrocatalyst for high-performance water splitting application

AU - Mishra, Rajneesh Kumar

AU - Kumar, Vipin

AU - Choi, Gyu Jin

AU - Ryu, Jeong Won

AU - Mane, Sagar M.

AU - Shin, Jae Cheol

AU - Gwag, Jin Seog

PY - 2022/10/1

Y1 - 2022/10/1

N2 - This study illustrates the catalytic hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities of the hexagonal NiO nanosheets on Ni-foam. The NiO electrocatalyst demonstrates the low overpotentials of 83 mV/380 mV and low Tafel slopes of 209 mV dec−1/299 mV dec−1 during HER/OER, respectively. It also reveals excellent stability, showing a slight change in overpotentials of 116 mV and 430 mV during HER/OER after 2000 CV cycles. Electrochemical impedance spectroscopy spectra show the series resistance of 0.83 Ω/1.04 Ω and charge-transfer resistance of 1.63 Ω/4.70 Ω during HER/OER after 2000 CV cycles.

AB - This study illustrates the catalytic hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) activities of the hexagonal NiO nanosheets on Ni-foam. The NiO electrocatalyst demonstrates the low overpotentials of 83 mV/380 mV and low Tafel slopes of 209 mV dec−1/299 mV dec−1 during HER/OER, respectively. It also reveals excellent stability, showing a slight change in overpotentials of 116 mV and 430 mV during HER/OER after 2000 CV cycles. Electrochemical impedance spectroscopy spectra show the series resistance of 0.83 Ω/1.04 Ω and charge-transfer resistance of 1.63 Ω/4.70 Ω during HER/OER after 2000 CV cycles.

KW - Hexagonal NiO nanosheets

KW - Hydrogen evolution reaction

KW - Oxygen evolution reaction

KW - Stability

KW - Water splitting

UR - https://www.scopus.com/pages/publications/85132889206

U2 - 10.1016/j.matlet.2022.132740

DO - 10.1016/j.matlet.2022.132740

M3 - Article

AN - SCOPUS:85132889206

SN - 0167-577X

VL - 324

JO - Materials Letters

JF - Materials Letters

M1 - 132740

ER -

Hexagonal NiO nanosheets on Ni-foam as an electrocatalyst for high-performance water splitting application

Abstract

UN SDGs

Keywords

Access to Document

Other files and links

Fingerprint

Cite this