Excellent electrocatalytic hydrogen evolution performance of hexagonal NiCoP porous nanosheets in alkaline solution

Jia, Yubao; Zhu, Lihua; Pan, Hongwei; Liao, Yanxin; Zhang, Yao; Zhang, Xin; Jiang, Zhigang; Chen, Mengtian; Wang, Kuikui

doi:10.1016/j.apsusc.2021.152314

Cited by 26 publications

(11 citation statements)

References 51 publications

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“…The application of precious metals as electrocatalysts is restricted by their high cost and scarcity of elements. − In light of this fact, nonprecious metal catalysts have been extensively investigated. A number of catalysts with excellent performance have been proposed, including phosphides, − sulfides, − oxides, − hydroxides, , carbides, , and so on, which are expected to be promising substitutes for precious metal electrocatalysts due to their low cost and simple preparation methods. − …”

Section: Introductionmentioning

confidence: 99%

Hierarchically Self-Supporting Phosphorus-Doped CoMoO₄ Nanoflowers Arrays toward Efficient Hydrogen Evolution Reaction

Wen

Wang

et al. 2022

ACS Appl. Energy Mater.

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Advances in non-noble-metal electrocatalysts for sustainable hydrogen evolution reactions (HERs) have had a significant impact on the production of renewable clean energy (H 2 ). Benefitting from high-efficiency synthesis methods, a controlled catalyst P-CoMoO 4 @Ni with a hierarchical structure with different morphologies on the surface of nickel foam (NF) has been synthesized. In particular, the optimized nanoflower oxide array electrode P-CoMoO 4 @Ni-1 performed as the best catalyst for HER with a large specific surface area and low charge-transfer resistance and was capable of delivering current densities of 100 and 150 mA cm −2 under low overpotentials of 98 and 162 mV, respectively. In addition, this work demonstrated that catalyst arrays adopted by polyoxometalates (POMs) as precursors with uniform nanoflower structures might be able to improve electrocatalytic performance as well as provide fundamental research of catalyst materials with high efficiency at low potentials in HER.

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Section: Introductionmentioning

confidence: 99%

Hierarchically Self-Supporting Phosphorus-Doped CoMoO₄ Nanoflowers Arrays toward Efficient Hydrogen Evolution Reaction

Wen

Wang

et al. 2022

ACS Appl. Energy Mater.

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“…On the other hand, Ni facilitates water molecule dissociation and OH – desorption, while Co promotes hydrogen production and release. The synergistic effect of Co and Ni can effectively enhance hydrogen precipitation performance …”

Section: Resultsmentioning

confidence: 99%

Controllable Synthesis of the Three-Dimensional Co–Ni Nanoweb Structure for Electrocatalytic Hydrogen Evolution Reaction

Zhou

Bai

Xie

et al. 2023

ACS Appl. Energy Mater.

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Nanostructuring of alloyed electrocatalysts with earth-abundant transition metals represents a promising strategy for the practical implementation of water splitting to produce hydrogen. Here, we constructed a nanoporous CoNi alloy electrocatalyst with a unique three-dimensional nanoweb structure on a nickel foam substrate. The optimized CoNi/NF electrocatalyst exhibits excellent hydrogen evolution activity with an overpotential of 52 mV and a Tafel slope of 68 mV dec–1. Furthermore, the high current density was sustained for 20 h with negligible decrease. Such superior activity and stability outperform other reported electrocatalysts, originating from the synergistic effect of Co and Ni metals and their unique porous 3D nanoweb structure, the latter are expected to create a large number of active sites for reaction. Density functional theory (DFT) calculations identified an increased density state at the Fermi energy level, which confirms the high electron density existing in the alloy structure.

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“…Compared with the standard diffraction pattern of hexagonal NiCoP (JCPDS No. 71-2336) [ 21 , 22 ], the XRD pattern of NiCoP shows six distinct diffraction peaks located at 2θ about 41.0°, 44.9°, 47.6°, 54.4°, 54.7°, and 55.3°, which can be attributed to the (111), (201), (210), (300), (002), and (210) planes. This result verifies the two-dimensional structure of NiCoP.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Bimetallic Ni-Co Phosphide Nanosheets for Electrochemical Non-Enzymatic H2O2 Sensing

2022

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NiCoP nanosheets (NSs) were successfully synthesized using the hydrothermal and high-temperature phosphorization process. The obtained NiCoP NSs were immobilized on a glassy carbon electrode (GCE) and used to construct a novel sensing platform for electrochemical non-enzymatic H2O2 sensing. Physicochemical characteristics of NiCoP NSs were obtained by field-emission scanning electron microscopy (FESEM), field-emission transmission electron microscope (FETEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). In addition, the electrochemical properties of NiCoP NSs were obtained by cyclic voltammetry (CV) and chronoamperometry (CA) towards the non-enzymatic detection of H2O2. FESEM and FETEM images provided a morphological insight (the unique nanosheets morphology of NiCoP) that could expose more active sites to promote mass/charge transport at the electrode/electrolyte interface. XRD and XPS results also confirmed the crystalline nature of the NiCoP nanosheets and the coexistence of multiple transitional metal oxidation states in NiCoP nanosheets. These unique physicochemical characteristics had a degree of contribution to ensuring enhancement in the electrochemical behavior. As a result, the synthesized NiCoP NSs composed of intercalated nanosheets, as well as the synergistic interaction between bimetallic Ni/Co and P atoms exhibited excellent electrocatalytical activity towards H2O2 electroreduction at neutral medium. As the results showed, the electrochemical sensing based on NiCoP NSs displayed a linear range of 0.05~4 mM, a sensitivity of 225.7 μA mM−1 cm−2, a limit of detection (LOD) of 1.190 μM, and good selectivity. It was concluded that NiCoP NSs-based electrochemical sensing might open new opportunities for future construction of H2O2 sensing platforms.

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Excellent electrocatalytic hydrogen evolution performance of hexagonal NiCoP porous nanosheets in alkaline solution

Cited by 26 publications

References 51 publications

Hierarchically Self-Supporting Phosphorus-Doped CoMoO₄ Nanoflowers Arrays toward Efficient Hydrogen Evolution Reaction

Hierarchically Self-Supporting Phosphorus-Doped CoMoO₄ Nanoflowers Arrays toward Efficient Hydrogen Evolution Reaction

Controllable Synthesis of the Three-Dimensional Co–Ni Nanoweb Structure for Electrocatalytic Hydrogen Evolution Reaction

Synthesis of Bimetallic Ni-Co Phosphide Nanosheets for Electrochemical Non-Enzymatic H2O2 Sensing

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Excellent electrocatalytic hydrogen evolution performance of hexagonal NiCoP porous nanosheets in alkaline solution

Cited by 26 publications

References 51 publications

Hierarchically Self-Supporting Phosphorus-Doped CoMoO4 Nanoflowers Arrays toward Efficient Hydrogen Evolution Reaction

Hierarchically Self-Supporting Phosphorus-Doped CoMoO4 Nanoflowers Arrays toward Efficient Hydrogen Evolution Reaction

Controllable Synthesis of the Three-Dimensional Co–Ni Nanoweb Structure for Electrocatalytic Hydrogen Evolution Reaction

Synthesis of Bimetallic Ni-Co Phosphide Nanosheets for Electrochemical Non-Enzymatic H2O2 Sensing

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Hierarchically Self-Supporting Phosphorus-Doped CoMoO₄ Nanoflowers Arrays toward Efficient Hydrogen Evolution Reaction

Hierarchically Self-Supporting Phosphorus-Doped CoMoO₄ Nanoflowers Arrays toward Efficient Hydrogen Evolution Reaction