Design and construction of bi-metal MOF-derived yolk–shell Ni<sub>2</sub>P/ZnP<sub>2</sub> hollow microspheres for efficient electrocatalytic oxygen evolution

Zhang, Jinyang; Sun, Xuan; Liu, Yang; Hou, Linrui; Yuan, Changzhou

doi:10.1039/d0qm00128g

Cited by 38 publications

(22 citation statements)

References 50 publications

(56 reference statements)

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“…44,45 What is worth mentioning is that the structure of Ni MOF-Fe-2 can maximize the contact between the material and the electrolyte, which is one of the reasons for its excellent electrochemical performance. 46,47…”

Section: Resultsmentioning

confidence: 99%

A yolk–shell structure construction for metal–organic frameworks toward an enhanced electrochemical water splitting catalysis

Zuo

Mou

et al. 2022

Dalton Trans.

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Section: Resultsmentioning

confidence: 99%

A yolk–shell structure construction for metal–organic frameworks toward an enhanced electrochemical water splitting catalysis

Zuo

Mou

et al. 2022

Dalton Trans.

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“…From the figure we can see that the charge transfer resistances of LCO‐X, especially for LCO‐60, were smaller than that of original LCO, which indicates that thermal reduction process would improve the conductivity of LCO and result in the faster mass transfer, lower reaction resistance as well as better catalytic activity. Afterwards, we estimated the ECSA (electrochemical active surface area) of LCO‐60 by the electrochemical double‐layer capacitance (C dl ) via the cyclic voltammetry (CV) curves measured at various scanning rates (Figure S13) [47–49] . From the Figure 5c we can see that the C dl of LCO‐60 is 0.709 mF cm −2 .…”

Section: Resultsmentioning

confidence: 99%

“…Afterwards, we estimated the ECSA (electrochemical active surface area) of LCO-60 by the electrochemical double-layer capacitance (C dl ) via the cyclic voltammetry (CV) curves measured at various scanning rates (Figure S13). [47][48][49] From the Figure 5c we can see that the C dl of LCO-60 is 0.709 mF cm À 2 . The I-t curves of LCO and LCO-60 (Figure 5d) were further conducted at 1.6 V fixed potential.…”

Section: Chemistry-a European Journalmentioning

confidence: 87%

The Spin Modulation Stimulated Efficient Electrocatalytic Oxygen Evolution Reaction over LaCoO₃ Perovskite

Zhou

Zhao

et al. 2022

Chemistry A European J

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Perovskite is a promising non-noble catalyst and has been widely investigated for the electrochemical oxygen evolution reaction (OER). However, there is still serious lack of valid approaches to further enhance their catalytic performance. Herein, we propose a spin state modulation strategy to improve the OER electrocatalytic activity of typical perovskite material of LaCoO 3 . Specifically, the electronic configuration transition was realized by a simple high temperature thermal reduction process. M-H hysteresis loop results reveal that the reduction treatment can produce more unpaired electrons in 3d orbit by promoting the electron transitions of Co from low spin state to high spin state, and thus lead to the increase of the spin polarization. Electrochemical measurements show that the catalytic performance of LaCoO 3 is strongly dependent on its electronic configuration. With the optimized reduction treatment, the overpotential for the OER process in 0.5 M KOH electrolyte solution at 10 mA cm À 2 current density was 396 mV, significantly lower than that of the original state. Furthermore, it can mediate efficient OER with an overpotential of 383 mV under an external magnetic field, which is attributed to the appropriate electron filling. Our results show that electron spin state regulation is a new way to boost the OER electrocatalytic activity.

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“…All potentials were corrected with an ohmic drop of ~32.0 Ω, namely iR compensation. Subsequently, all measured potentials were converted to the reversible hydrogen electrode (RHE) scale according to the Nernst equation (Equation ( 1)) [35].…”

Section: Electrochemical Evaluation Of Catalystmentioning

confidence: 99%

2D Zinc-Based Metal–Organic Complexes Derived N-Doped Porous Carbon Nanosheets as Durable Air Cathode for Rechargeable Zn–Air Batteries

et al. 2022

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The defect and N-doping engineering are critical to developing the highly efficient metal-free electrocatalysts for oxygen reduction reaction (ORR), mainly because they can efficiently regulate the geometric/electronic structures and sur-/interface properties of the carbon matrix. Herein, we provide a facile and scalable strategy for the large-scale synthesis of N-doped porous carbon nanosheets (NPCNs) with hierarchical pore structure, only involving solvothermal and pyrolysis processes. Additionally, the turnover frequency of ORR (TOFORR) was calculated by taking into account the electron-transfer number (n). Benefiting from the trimodal pore structures, high specific surface area, a higher pore volume, high-ratio mesopores, massive vacancies/long-range structural defects, and high-content pyridinic-N (~2.1%), the NPCNs-1000 shows an excellent ORR activity (1600 rpm, js = ~5.99 mA cm−2), a selectivity to four-electron ORR (~100%) and a superior stability in both the three-electrode tests (CP test for 7500 s at 0.8 V, Δjs = ~0.58 mA cm−2) and Zn–Air battery (a negligible loss of 0.08 V within 265 h). Besides, the experimental results indicate that the enhancement of ORR activity mainly originates from the defects and pyridinic-N. More significantly, this work is expected to realize green and efficient energy storage and conversion along with the carbon peaking and carbon neutrality goals.

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Design and construction of bi-metal MOF-derived yolk–shell Ni₂P/ZnP₂ hollow microspheres for efficient electrocatalytic oxygen evolution

Abstract: Hierarchical yolk–shell Ni2P/ZnP2 hollow microspheres are smartly synthesized, and exhibit exceptional OER performance, benefiting from their unique compositional/structural merits.

Cited by 38 publications

References 50 publications

A yolk–shell structure construction for metal–organic frameworks toward an enhanced electrochemical water splitting catalysis

A yolk–shell structure construction for metal–organic frameworks toward an enhanced electrochemical water splitting catalysis

The Spin Modulation Stimulated Efficient Electrocatalytic Oxygen Evolution Reaction over LaCoO₃ Perovskite

2D Zinc-Based Metal–Organic Complexes Derived N-Doped Porous Carbon Nanosheets as Durable Air Cathode for Rechargeable Zn–Air Batteries

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Design and construction of bi-metal MOF-derived yolk–shell Ni2P/ZnP2 hollow microspheres for efficient electrocatalytic oxygen evolution

Abstract: Hierarchical yolk–shell Ni2P/ZnP2 hollow microspheres are smartly synthesized, and exhibit exceptional OER performance, benefiting from their unique compositional/structural merits.

Cited by 38 publications

References 50 publications

A yolk–shell structure construction for metal–organic frameworks toward an enhanced electrochemical water splitting catalysis

A yolk–shell structure construction for metal–organic frameworks toward an enhanced electrochemical water splitting catalysis

The Spin Modulation Stimulated Efficient Electrocatalytic Oxygen Evolution Reaction over LaCoO3 Perovskite

2D Zinc-Based Metal–Organic Complexes Derived N-Doped Porous Carbon Nanosheets as Durable Air Cathode for Rechargeable Zn–Air Batteries

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Design and construction of bi-metal MOF-derived yolk–shell Ni₂P/ZnP₂ hollow microspheres for efficient electrocatalytic oxygen evolution

The Spin Modulation Stimulated Efficient Electrocatalytic Oxygen Evolution Reaction over LaCoO₃ Perovskite