A hierarchical CoSx/Ni(OH)2 heterostructure as a bifunctional electrocatalyst for urea-assisted energy-efficient hydrogen production

Sang, Bin; Xue, Chaozhuang; Guo, Songyun; Wng, Xiaojun; Xie, Shuixiang; Wang, Changming; Li, Rui-Qing

doi:10.1039/d4cc01253d

Chem. Commun.

2024

DOI: 10.1039/d4cc01253d

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A hierarchical CoS_x/Ni(OH)₂ heterostructure as a bifunctional electrocatalyst for urea-assisted energy-efficient hydrogen production

Bin Sang,

Chaozhuang Xue,

Songyun Guo

et al.

Abstract: We reported hierarchical CoSx/Ni(OH)2/NF heterostructure nanorod arrays, which manifests superior bifunctional catalytic activities for HER and UOR due to the amorphous Ni(OH)2, synergistic effect of multi-components and self-supported structure. The...

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2024

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Cited by 2 publications

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Electronic redistribution induced by interaction between ruthenium nanoparticles and Ni–N(O)–C sites boosts alkaline water electrolysis

Wang,

He,

Zong

et al. 2024

Chem. Commun.

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Electronic redistribution induced by interaction between ruthenium nanoparticles and Ni–N(O)–C sites boosts alkaline water electrolysis

Wang,

He,

Zong

et al. 2024

Chem. Commun.

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Electrochemically Induced Cu-NiOOH/Cu2O/Cu Mesh Heteroarchitecture with Cu-Ni Dual Active Sites as Efficient Bifunctional Electrocatalyst for Urea-Assisted Energy-Saving Hydrogen Production in Alkaline Electrolyte

Zhao,

Xu,

Wang

et al. 2024

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The electrocatalytic oxidation of urea combined with wastewater splitting is considered a promising approach for sustainable hydrogen production, characterized by minimal energy consumption. However, its evolution is greatly hindered by the shortage of efficient and easily accessible electrocatalytic materials. Here, a facile electrochemical activation strategy was conceived and proposed to construct a Cu-doped NiOOH nanolayer encapsulated on Cu2O nanodendrites on Cu mesh substrate (Cu-NiOOH/Cu2O/CM) from the electrodeposited Ni/Cu2O/CM heterostructured precatalyst. It was verified that the incorporation of Cu not only facilitates the rapid formation of Ni(III) species but also contributes to the formation of Cu-Ni(III) bifunctional electrocatalytic active sites. Benefiting from the accessible Cu-Ni(III) dual active sites, high active surface area, good hydrophilic and aerophobic surface properties and superior electrical conductivity of the Cu mesh substrate, the as-prepared Cu-NiOOH/Cu2O/CM exhibits enhanced bifunctional electrocatalytic abilities for electrocatalytic urea oxidation reaction (UOR) and hydrogen evolution reaction (HER). Particularly, for the Cu-NiOOH/Cu2O/CM||Cu-NiOOH/Cu2O/CM configuration toward the UOR||HER coupled system, a significantly reduced cell voltage of 1.43 V vs. RHE @ 10 mA·cm−2 was obtained. The observed cell voltage for the conventional overall water splitting is approximately 190 mV higher than that observed for overall urea splitting. This study proposes a viable approach to achieve and optimize the bifunctional UOR/HER performance of NiOOH active species, which holds significant importance for efficient and stable hydrogen generation from urea-contaminated substandard water.

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A hierarchical CoS_x/Ni(OH)₂ heterostructure as a bifunctional electrocatalyst for urea-assisted energy-efficient hydrogen production

Abstract: We reported hierarchical CoSx/Ni(OH)2/NF heterostructure nanorod arrays, which manifests superior bifunctional catalytic activities for HER and UOR due to the amorphous Ni(OH)2, synergistic effect of multi-components and self-supported structure. The...

Cited by 2 publications

References 44 publications

Electronic redistribution induced by interaction between ruthenium nanoparticles and Ni–N(O)–C sites boosts alkaline water electrolysis

Electronic redistribution induced by interaction between ruthenium nanoparticles and Ni–N(O)–C sites boosts alkaline water electrolysis

Electrochemically Induced Cu-NiOOH/Cu2O/Cu Mesh Heteroarchitecture with Cu-Ni Dual Active Sites as Efficient Bifunctional Electrocatalyst for Urea-Assisted Energy-Saving Hydrogen Production in Alkaline Electrolyte

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