Designing of noble metal free high performance mesoporous electrocatalysts for water splitting

Zeenat Shafi; Zahoor Ahmad; Khurram Saleem Joya; Shahid Iqbal; Muhammad Naeem Khan

doi:10.1016/j.ijhydene.2021.09.211

Designing of noble metal free high performance mesoporous electrocatalysts for water splitting

Zeenat Shafi
, Zahoor Ahmad^*
, Khurram Saleem Joya
, Shahid Iqbal
, Muhammad Naeem Khan

^*Corresponding author for this work

Research output: Journal Publication › Article › peer-review

15 Citations (Scopus)

Abstract

The work undertaken involved the synthesis of mesoporous M-ferrites (M = Co, Ni) by facile PEG-assisted microemulsion method and exploration of their electrocatalytic potential for water splitting. The onset potential for oxygen evolution befalls at nearly 1.53 V_RHE (η = 300 mV), which is 400–450 mV lesser than those reported for simple ferrites and iron oxides thin-film as electrocatalysts. These electrocatalysts exhibit the good electroactive zone having the lowest Tafel slope value, 68 mVdec⁻¹, as compared to that reported for nickel and cobalt based materials. High TOF value is attributed to the superior catalytic activity of the catalysts. NiFe₂O₄ exhibits the turn over frequency (TOF) of 2.4 s⁻¹ just at overpotential value of 0.42 V_RHE with 1.2 μmol of the prepared sample used in electrochemical analysis. The long-term catalytic stability of Ni and Co-Ferrites spectacle a remarkable and stable current density of >15 mAcm⁻² for oxygen evolution and maintained for several hours.

Original language	English
Pages (from-to)	39799-39809
Number of pages	11
Journal	International Journal of Hydrogen Energy
Volume	46
Issue number	80
DOIs	https://doi.org/10.1016/j.ijhydene.2021.09.211
Publication status	Published - 18 Nov 2021
Externally published	Yes

UN SDGs

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

SDG 7 Affordable and Clean Energy

Free Keywords

Electrocatalysis
H production
Low overpotential
Microemulsion
Spinel ferrites

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Fuel Technology
Condensed Matter Physics
Energy Engineering and Power Technology

Access to Document

10.1016/j.ijhydene.2021.09.211

Cite this

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title = "Designing of noble metal free high performance mesoporous electrocatalysts for water splitting",

abstract = "The work undertaken involved the synthesis of mesoporous M-ferrites (M = Co, Ni) by facile PEG-assisted microemulsion method and exploration of their electrocatalytic potential for water splitting. The onset potential for oxygen evolution befalls at nearly 1.53 VRHE (η = 300 mV), which is 400–450 mV lesser than those reported for simple ferrites and iron oxides thin-film as electrocatalysts. These electrocatalysts exhibit the good electroactive zone having the lowest Tafel slope value, 68 mVdec−1, as compared to that reported for nickel and cobalt based materials. High TOF value is attributed to the superior catalytic activity of the catalysts. NiFe2O4 exhibits the turn over frequency (TOF) of 2.4 s−1 just at overpotential value of 0.42 VRHE with 1.2 μmol of the prepared sample used in electrochemical analysis. The long-term catalytic stability of Ni and Co-Ferrites spectacle a remarkable and stable current density of >15 mAcm−2 for oxygen evolution and maintained for several hours.",

keywords = "Electrocatalysis, H production, Low overpotential, Microemulsion, Spinel ferrites",

author = "Zeenat Shafi and Zahoor Ahmad and Joya, \{Khurram Saleem\} and Shahid Iqbal and Khan, \{Muhammad Naeem\}",

note = "Publisher Copyright: {\textcopyright} 2021 Hydrogen Energy Publications LLC",

year = "2021",

month = nov,

day = "18",

doi = "10.1016/j.ijhydene.2021.09.211",

language = "English",

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T1 - Designing of noble metal free high performance mesoporous electrocatalysts for water splitting

AU - Shafi, Zeenat

AU - Ahmad, Zahoor

AU - Joya, Khurram Saleem

AU - Iqbal, Shahid

AU - Khan, Muhammad Naeem

PY - 2021/11/18

Y1 - 2021/11/18

N2 - The work undertaken involved the synthesis of mesoporous M-ferrites (M = Co, Ni) by facile PEG-assisted microemulsion method and exploration of their electrocatalytic potential for water splitting. The onset potential for oxygen evolution befalls at nearly 1.53 VRHE (η = 300 mV), which is 400–450 mV lesser than those reported for simple ferrites and iron oxides thin-film as electrocatalysts. These electrocatalysts exhibit the good electroactive zone having the lowest Tafel slope value, 68 mVdec−1, as compared to that reported for nickel and cobalt based materials. High TOF value is attributed to the superior catalytic activity of the catalysts. NiFe2O4 exhibits the turn over frequency (TOF) of 2.4 s−1 just at overpotential value of 0.42 VRHE with 1.2 μmol of the prepared sample used in electrochemical analysis. The long-term catalytic stability of Ni and Co-Ferrites spectacle a remarkable and stable current density of >15 mAcm−2 for oxygen evolution and maintained for several hours.

AB - The work undertaken involved the synthesis of mesoporous M-ferrites (M = Co, Ni) by facile PEG-assisted microemulsion method and exploration of their electrocatalytic potential for water splitting. The onset potential for oxygen evolution befalls at nearly 1.53 VRHE (η = 300 mV), which is 400–450 mV lesser than those reported for simple ferrites and iron oxides thin-film as electrocatalysts. These electrocatalysts exhibit the good electroactive zone having the lowest Tafel slope value, 68 mVdec−1, as compared to that reported for nickel and cobalt based materials. High TOF value is attributed to the superior catalytic activity of the catalysts. NiFe2O4 exhibits the turn over frequency (TOF) of 2.4 s−1 just at overpotential value of 0.42 VRHE with 1.2 μmol of the prepared sample used in electrochemical analysis. The long-term catalytic stability of Ni and Co-Ferrites spectacle a remarkable and stable current density of >15 mAcm−2 for oxygen evolution and maintained for several hours.

KW - Electrocatalysis

KW - H production

KW - Low overpotential

KW - Microemulsion

KW - Spinel ferrites

UR - https://www.scopus.com/pages/publications/85117730087

U2 - 10.1016/j.ijhydene.2021.09.211

DO - 10.1016/j.ijhydene.2021.09.211

M3 - Article

AN - SCOPUS:85117730087

SN - 0360-3199

VL - 46

SP - 39799

EP - 39809

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 80

ER -

Designing of noble metal free high performance mesoporous electrocatalysts for water splitting

Abstract

UN SDGs

Free Keywords

ASJC Scopus subject areas

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