Sulfur Recovery Assisted Electrochemical Water Splitting for H2 Production Using CoMo-Based Nanorod Arrays Catalysts

Jinyan Huo; Qing Liu; Xiaofang Liu; Xuefeng Cheng; Dongyun Chen; Najun Li; Kin Liao; Qingfeng Xu; Jianmei Lu

doi:10.1021/acsmaterialslett.4c00695

Sulfur Recovery Assisted Electrochemical Water Splitting for H₂ Production Using CoMo-Based Nanorod Arrays Catalysts

Jinyan Huo
, Qing Liu
, Xiaofang Liu
, Xuefeng Cheng
, Dongyun Chen
, Najun Li
, Kin Liao
, Qingfeng Xu
, Jianmei Lu

Soochow University
Department of Aerospace Engineering

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

26 Scopus citations

Abstract

Swapping the sluggish oxygen evolution reaction (OER) for the thermodynamically advantageous sulfur ion oxidation reaction (SOR) makes it possible to produce low-energy hydrogen. We report here on an electrocatalytic SOR-coupled HER system that allows for the joint production of sulfur and hydrogen. We prepare a CoMoO₄ nanoarray on nickel foam (NF) for anodic SOR and N-doped CoMoO₄/NF, CoMoN/NF, for cathodic HER. The current density of 100 mA cm^-2 was obtained at 0.29 V (vs RHE) in the SOR process. After nitridation, the electrode can achieve a current density of 10 mA cm^-2 in HER at a voltage of only 32 mV (vs RHE). The coupling system (SOR//HER) can run steadily for 150 h. Detailed exploration and discussion were conducted on the pathways of SOR. This work develops an energy-efficient mixed water electrolysis system for H₂, providing a viable option for toxic waste treatment.

Original language	British English
Pages (from-to)	2633-2641
Number of pages	9
Journal	ACS Materials Letters
Volume	6
Issue number	7
DOIs	https://doi.org/10.1021/acsmaterialslett.4c00695
State	Published - 1 Jul 2024

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

SDG 12 Responsible Consumption and Production

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title = "Sulfur Recovery Assisted Electrochemical Water Splitting for H2 Production Using CoMo-Based Nanorod Arrays Catalysts",

abstract = "Swapping the sluggish oxygen evolution reaction (OER) for the thermodynamically advantageous sulfur ion oxidation reaction (SOR) makes it possible to produce low-energy hydrogen. We report here on an electrocatalytic SOR-coupled HER system that allows for the joint production of sulfur and hydrogen. We prepare a CoMoO4 nanoarray on nickel foam (NF) for anodic SOR and N-doped CoMoO4/NF, CoMoN/NF, for cathodic HER. The current density of 100 mA cm-2 was obtained at 0.29 V (vs RHE) in the SOR process. After nitridation, the electrode can achieve a current density of 10 mA cm-2 in HER at a voltage of only 32 mV (vs RHE). The coupling system (SOR//HER) can run steadily for 150 h. Detailed exploration and discussion were conducted on the pathways of SOR. This work develops an energy-efficient mixed water electrolysis system for H2, providing a viable option for toxic waste treatment.",

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AU - Huo, Jinyan

AU - Liu, Qing

AU - Liu, Xiaofang

AU - Cheng, Xuefeng

AU - Chen, Dongyun

AU - Li, Najun

AU - Liao, Kin

AU - Xu, Qingfeng

AU - Lu, Jianmei

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N2 - Swapping the sluggish oxygen evolution reaction (OER) for the thermodynamically advantageous sulfur ion oxidation reaction (SOR) makes it possible to produce low-energy hydrogen. We report here on an electrocatalytic SOR-coupled HER system that allows for the joint production of sulfur and hydrogen. We prepare a CoMoO4 nanoarray on nickel foam (NF) for anodic SOR and N-doped CoMoO4/NF, CoMoN/NF, for cathodic HER. The current density of 100 mA cm-2 was obtained at 0.29 V (vs RHE) in the SOR process. After nitridation, the electrode can achieve a current density of 10 mA cm-2 in HER at a voltage of only 32 mV (vs RHE). The coupling system (SOR//HER) can run steadily for 150 h. Detailed exploration and discussion were conducted on the pathways of SOR. This work develops an energy-efficient mixed water electrolysis system for H2, providing a viable option for toxic waste treatment.

AB - Swapping the sluggish oxygen evolution reaction (OER) for the thermodynamically advantageous sulfur ion oxidation reaction (SOR) makes it possible to produce low-energy hydrogen. We report here on an electrocatalytic SOR-coupled HER system that allows for the joint production of sulfur and hydrogen. We prepare a CoMoO4 nanoarray on nickel foam (NF) for anodic SOR and N-doped CoMoO4/NF, CoMoN/NF, for cathodic HER. The current density of 100 mA cm-2 was obtained at 0.29 V (vs RHE) in the SOR process. After nitridation, the electrode can achieve a current density of 10 mA cm-2 in HER at a voltage of only 32 mV (vs RHE). The coupling system (SOR//HER) can run steadily for 150 h. Detailed exploration and discussion were conducted on the pathways of SOR. This work develops an energy-efficient mixed water electrolysis system for H2, providing a viable option for toxic waste treatment.

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