Highly-stable, bifunctional, binder-free & stand-alone photoelectrode (FexNi1-xO@a-CC) for natural waters splitting into hydrogen

Maryam Yousaf; Muhammad Ahmad; Aisha Batool; Zhi Ping Zhao

doi:10.1016/j.ijhydene.2022.08.173

Highly-stable, bifunctional, binder-free & stand-alone photoelectrode (Fe_xNi_1-xO@a-CC) for natural waters splitting into hydrogen

Maryam Yousaf, Muhammad Ahmad, Aisha Batool, Zhi Ping Zhao^*

^*Corresponding author for this work

School of Chemistry and Chemical Engineering

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

12 Citations (Scopus)

Abstract

Photoelectrochemical (PEC) water splitting is a promising approach to boost green hydrogen production. Herein, we prepared novel binder-free photoelectrode by direct growth of iron doped nickel oxide catalyst over activated carbon cloth (Fe_xNi_1-xO@a-CC) having band gap energy of 2.2 eV for overall water splitting. Fe_xNi_1-xO@a-CC photoelectrode had shown remarkable lower potential of only 1.36 V for oxygen evolution reaction (OER) to reach 10 mA cm⁻² current density using very low photonic intensity of 8.36 × 10⁻⁴ E/L.s. For the first time, we also reported electrical efficiency required for PEC water splitting for 1 m³ of water that is equal to 0.09 kWh/m³. Fe_xNi_1-xO@a-CC photoelectrode also exhibits low potentials of 1.44 V (OER) and −0.210 V (HER) at 10 mA cm⁻² to split sea water. Our results confirmed that designing Fe_xNi_1-xO@a-CC photoelectrode would be an innovative step to widen green energy conversion applications using natural waters (both sea and fresh water).

Original language	English
Pages (from-to)	36032-36045
Number of pages	14
Journal	International Journal of Hydrogen Energy
Volume	47
Issue number	85
DOIs	https://doi.org/10.1016/j.ijhydene.2022.08.173
Publication status	Published - 15 Oct 2022

Keywords

Carbon cloth
Hydrogen evolution reaction
Iron doped nickel oxide
Oxygen evolution reaction
Photoelectrochemical water splitting

UN SDGs

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

Access to Document

10.1016/j.ijhydene.2022.08.173

Cite this

@article{e8f14dd1e69f44e5995495e6a401458f,

title = "Highly-stable, bifunctional, binder-free & stand-alone photoelectrode (FexNi1-xO@a-CC) for natural waters splitting into hydrogen",

abstract = "Photoelectrochemical (PEC) water splitting is a promising approach to boost green hydrogen production. Herein, we prepared novel binder-free photoelectrode by direct growth of iron doped nickel oxide catalyst over activated carbon cloth (FexNi1-xO@a-CC) having band gap energy of 2.2 eV for overall water splitting. FexNi1-xO@a-CC photoelectrode had shown remarkable lower potential of only 1.36 V for oxygen evolution reaction (OER) to reach 10 mA cm−2 current density using very low photonic intensity of 8.36 × 10−4 E/L.s. For the first time, we also reported electrical efficiency required for PEC water splitting for 1 m3 of water that is equal to 0.09 kWh/m3. FexNi1-xO@a-CC photoelectrode also exhibits low potentials of 1.44 V (OER) and −0.210 V (HER) at 10 mA cm−2 to split sea water. Our results confirmed that designing FexNi1-xO@a-CC photoelectrode would be an innovative step to widen green energy conversion applications using natural waters (both sea and fresh water).",

keywords = "Carbon cloth, Hydrogen evolution reaction, Iron doped nickel oxide, Oxygen evolution reaction, Photoelectrochemical water splitting",

author = "Maryam Yousaf and Muhammad Ahmad and Aisha Batool and Zhao, {Zhi Ping}",

note = "Publisher Copyright: {\textcopyright} 2022 Hydrogen Energy Publications LLC",

year = "2022",

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AU - Yousaf, Maryam

AU - Ahmad, Muhammad

AU - Batool, Aisha

AU - Zhao, Zhi Ping

PY - 2022/10/15

Y1 - 2022/10/15

N2 - Photoelectrochemical (PEC) water splitting is a promising approach to boost green hydrogen production. Herein, we prepared novel binder-free photoelectrode by direct growth of iron doped nickel oxide catalyst over activated carbon cloth (FexNi1-xO@a-CC) having band gap energy of 2.2 eV for overall water splitting. FexNi1-xO@a-CC photoelectrode had shown remarkable lower potential of only 1.36 V for oxygen evolution reaction (OER) to reach 10 mA cm−2 current density using very low photonic intensity of 8.36 × 10−4 E/L.s. For the first time, we also reported electrical efficiency required for PEC water splitting for 1 m3 of water that is equal to 0.09 kWh/m3. FexNi1-xO@a-CC photoelectrode also exhibits low potentials of 1.44 V (OER) and −0.210 V (HER) at 10 mA cm−2 to split sea water. Our results confirmed that designing FexNi1-xO@a-CC photoelectrode would be an innovative step to widen green energy conversion applications using natural waters (both sea and fresh water).

AB - Photoelectrochemical (PEC) water splitting is a promising approach to boost green hydrogen production. Herein, we prepared novel binder-free photoelectrode by direct growth of iron doped nickel oxide catalyst over activated carbon cloth (FexNi1-xO@a-CC) having band gap energy of 2.2 eV for overall water splitting. FexNi1-xO@a-CC photoelectrode had shown remarkable lower potential of only 1.36 V for oxygen evolution reaction (OER) to reach 10 mA cm−2 current density using very low photonic intensity of 8.36 × 10−4 E/L.s. For the first time, we also reported electrical efficiency required for PEC water splitting for 1 m3 of water that is equal to 0.09 kWh/m3. FexNi1-xO@a-CC photoelectrode also exhibits low potentials of 1.44 V (OER) and −0.210 V (HER) at 10 mA cm−2 to split sea water. Our results confirmed that designing FexNi1-xO@a-CC photoelectrode would be an innovative step to widen green energy conversion applications using natural waters (both sea and fresh water).

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