Eggshell membrane-derived metal sulfide catalysts for seawater splitting

Cui, Lingyu; Zhang, Lan; Shen, Yi

doi:10.1039/d4gc02017k

Green Chem.

2024

DOI: 10.1039/d4gc02017k

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Eggshell membrane-derived metal sulfide catalysts for seawater splitting

Lingyu Cui,

Lan Zhang,

Yi Shen

Abstract: To replace depleting freshwater resources, seawater, with its abundance and economy, has become a more favourable option for water electrolysis. However, seawater electrolysis necessitates electrocatalysts with excellent activity as well...

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p–n-Type LaCoO₃/NiFe LDH Heterostructures for Enhanced Photogenerated Carrier-Assisted Electrocatalytic Oxygen Evolution Reaction

Cui,

Jia,

et al. 2024

ACS Appl. Mater. Interfaces

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The oxygen evolution reaction (OER) poses a significant kinetic challenge for various critical energy conversion and storage technologies including electrocatalytic water splitting and metal−air batteries. In this study, a LaCoO 3 /NiFe layered double hydroxide (LDH) catalyst was synthesized through the in situ growth of n-type NiFe LDH on the surface of the p-type LaCoO 3 semiconductor, resulting in a p−n heterostructure for a photogenerated carrier-assisted electrocatalytic OER (PCA-eOER). The alignment of their band structures facilitates the formation of an internal electric field at the heterojunction interface, which promotes the creation of oxygen vacancies and enhances electron transport. Under illumination, the expanded visible-light absorption range and built-in electric field work synergistically to improve the generation and separation of photogenerated carriers. Meanwhile, the accumulation of photogenerated holes on the surface of NiFe LDH results in an enhancement in the concentration of high-valent active metal sites, resulting in a boost in the PCA-eOER efficiency. The LaCoO 3 /NiFe LDH has achieved an overpotential of 260 mV at the current density of 10 mA cm −2 , 50 mV lower than in the absence of illumination. In addition, LaCoO 3 /NiFe LDH was assembled into an alkaline water electrolyzer and zinc−air batteries (ZABs), showing excellent practical application capability. We explored the application of LaCoO 3 in a PCA-eOER, which provides a concept for designing PCA-eOER catalysts and advancing the development of perovskite-based catalysts for clean energy conversion technology.

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p–n-Type LaCoO₃/NiFe LDH Heterostructures for Enhanced Photogenerated Carrier-Assisted Electrocatalytic Oxygen Evolution Reaction

Cui,

Jia,

et al. 2024

ACS Appl. Mater. Interfaces

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Engineering high-valence nickel sites in Ni₃S₂/Ni₃Se₂ architectures enabling urea-assisted hydrogen evolution reactions

Ai,

Bai,

Bao

et al. 2024

Green Chem.

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Eggshell membrane-derived metal sulfide catalysts for seawater splitting

Abstract: To replace depleting freshwater resources, seawater, with its abundance and economy, has become a more favourable option for water electrolysis. However, seawater electrolysis necessitates electrocatalysts with excellent activity as well...

Cited by 2 publications

References 75 publications

p–n-Type LaCoO₃/NiFe LDH Heterostructures for Enhanced Photogenerated Carrier-Assisted Electrocatalytic Oxygen Evolution Reaction

p–n-Type LaCoO₃/NiFe LDH Heterostructures for Enhanced Photogenerated Carrier-Assisted Electrocatalytic Oxygen Evolution Reaction

Engineering high-valence nickel sites in Ni₃S₂/Ni₃Se₂ architectures enabling urea-assisted hydrogen evolution reactions

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Eggshell membrane-derived metal sulfide catalysts for seawater splitting

Abstract: To replace depleting freshwater resources, seawater, with its abundance and economy, has become a more favourable option for water electrolysis. However, seawater electrolysis necessitates electrocatalysts with excellent activity as well...

Cited by 2 publications

References 75 publications

p–n-Type LaCoO3/NiFe LDH Heterostructures for Enhanced Photogenerated Carrier-Assisted Electrocatalytic Oxygen Evolution Reaction

p–n-Type LaCoO3/NiFe LDH Heterostructures for Enhanced Photogenerated Carrier-Assisted Electrocatalytic Oxygen Evolution Reaction

Engineering high-valence nickel sites in Ni3S2/Ni3Se2 architectures enabling urea-assisted hydrogen evolution reactions

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p–n-Type LaCoO₃/NiFe LDH Heterostructures for Enhanced Photogenerated Carrier-Assisted Electrocatalytic Oxygen Evolution Reaction

p–n-Type LaCoO₃/NiFe LDH Heterostructures for Enhanced Photogenerated Carrier-Assisted Electrocatalytic Oxygen Evolution Reaction

Engineering high-valence nickel sites in Ni₃S₂/Ni₃Se₂ architectures enabling urea-assisted hydrogen evolution reactions