Regulating catalytic kinetics in nanoclimbing-wall-like NiO/NiCoP hybrids for enhanced overall water splitting

Wang, Xiuwen; Yu, Lan; Lv, Chunmei; Xie, Ying; Jiao, Yanqing; Xin, Wen; Xu, Tengfei; Su, Tingting; Yang, Libin

doi:10.1039/d4ta02232g

J. Mater. Chem. A

2024

DOI: 10.1039/d4ta02232g

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Regulating catalytic kinetics in nanoclimbing-wall-like NiO/NiCoP hybrids for enhanced overall water splitting

Xiuwen Wang,

Lan Yu,

Chunmei Lv

et al.

Abstract: The HER, OER, and water electrolysis properties in an alkaline medium and the corresponding mechanism of nanoclimbing-wall-like NiO/NiCoP are revealed by the electrochemical tests, in situ Raman spectroscopy, and DFT calculation.

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Controllable modulation of the coordination environment of Ni atoms via vanadium doping to improve the water and hydrogen binding capability of NiO for low-overpotential alkaline hydrogen evolution

Wang,

Li,

Chen

et al. 2024

Renewable Energy

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Controllable modulation of the coordination environment of Ni atoms via vanadium doping to improve the water and hydrogen binding capability of NiO for low-overpotential alkaline hydrogen evolution

Wang,

Li,

Chen

et al. 2024

Renewable Energy

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Construction of LDH-derived CoNiP modified W/Z-CdS homojunction for improved photocatalytic hydrogen evolution: Achieving broad solar light response and multiple phases charge transfer

Zhao,

Wang,

Zhu

et al. 2025

Separation and Purification Technology

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Manipulating Electron Redistribution in the FeNi₂S₄/Ni₃S₂ Heterostructure for Enhanced Alkaline Water Electrolysis

Wang,

Su,

et al. 2024

ACS Appl. Nano Mater.

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Developing efficient bifunctional electrocatalysts for enhanced alkaline water electrolysis remains a challenge. Herein, the density functional theory (DFT) calculation is proposed to preanalyze the electron redistribution by introducing Co heteroatom doping and heterostructure engineering in cobaltdoped FeNi 2 S 4 (Co-FeNi 2 S 4 )/nickel sulfide (Ni 3 S 2 ). The mushroom-like Co-FeNi 2 S 4 /Ni 3 S 2 is constructed on nickel foam (Co-FeNi 2 S 4 /Ni 3 S 2 /NF) through a two-step solvothermal method. Resultantly, the optimized Co-FeNi 2 S 4 /Ni 3 S 2 /NF shows excellent electrochemical activities, affirmed by the significantly low overpotentials of 133 mV for the hydrogen evolution reaction (HER) at 10 mA cm −2 , 261 mV for the oxygen evolution reaction (OER) at 50 mA cm −2 , and 1.58 V for overall water splitting at 10 mA cm −2 . In situ Raman spectra and DFT calculation results collectively unveil the reasons for the enhanced electrocatalytic activity. Specifically, introducing Co doping and heterostructures in catalysts not only manipulates electron redistribution and optimizes the d-band center (ε d ) level to further accelerate electrocatalytic kinetics but also reveals the interfacial Co atoms responsible for the HER and Ni/Fe (oxy)hydroxides at the surface, facilitating the OER. This work provides elaborate insights into the manipulation of electron redistribution in electrocatalysts and is expected to guide the synthesis of other efficient electrocatalysts.

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Regulating catalytic kinetics in nanoclimbing-wall-like NiO/NiCoP hybrids for enhanced overall water splitting

Abstract: The HER, OER, and water electrolysis properties in an alkaline medium and the corresponding mechanism of nanoclimbing-wall-like NiO/NiCoP are revealed by the electrochemical tests, in situ Raman spectroscopy, and DFT calculation.

Cited by 3 publications

References 55 publications

Controllable modulation of the coordination environment of Ni atoms via vanadium doping to improve the water and hydrogen binding capability of NiO for low-overpotential alkaline hydrogen evolution

Controllable modulation of the coordination environment of Ni atoms via vanadium doping to improve the water and hydrogen binding capability of NiO for low-overpotential alkaline hydrogen evolution

Construction of LDH-derived CoNiP modified W/Z-CdS homojunction for improved photocatalytic hydrogen evolution: Achieving broad solar light response and multiple phases charge transfer

Manipulating Electron Redistribution in the FeNi₂S₄/Ni₃S₂ Heterostructure for Enhanced Alkaline Water Electrolysis

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Regulating catalytic kinetics in nanoclimbing-wall-like NiO/NiCoP hybrids for enhanced overall water splitting

Abstract: The HER, OER, and water electrolysis properties in an alkaline medium and the corresponding mechanism of nanoclimbing-wall-like NiO/NiCoP are revealed by the electrochemical tests, in situ Raman spectroscopy, and DFT calculation.

Cited by 3 publications

References 55 publications

Controllable modulation of the coordination environment of Ni atoms via vanadium doping to improve the water and hydrogen binding capability of NiO for low-overpotential alkaline hydrogen evolution

Controllable modulation of the coordination environment of Ni atoms via vanadium doping to improve the water and hydrogen binding capability of NiO for low-overpotential alkaline hydrogen evolution

Construction of LDH-derived CoNiP modified W/Z-CdS homojunction for improved photocatalytic hydrogen evolution: Achieving broad solar light response and multiple phases charge transfer

Manipulating Electron Redistribution in the FeNi2S4/Ni3S2 Heterostructure for Enhanced Alkaline Water Electrolysis

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Product

Resources

About

Manipulating Electron Redistribution in the FeNi₂S₄/Ni₃S₂ Heterostructure for Enhanced Alkaline Water Electrolysis