1D hollow MFe2O4 (M = Cu, Co, Ni) fibers by Solution Blow Spinning for oxygen evolution reaction

Silva, Vinícius D.; Ferreira, Luciena S.; Simões, Thiago A.; Medeiros, Eliton S.; Macedo, Daniel A.

doi:10.1016/j.jcis.2019.01.003

Cited by 112 publications

(49 citation statements)

References 47 publications

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“…To surmount the aforementioned bottlenecks in practical applications several materials, for instance, metal oxides, hydroxides, chalcogenides and phosphides were largely scrutinized for electricity‐driven water splitting catalysts. Among the contenders, metal oxides particularly mixed transition metal spinel oxides of type AB 2 O 4 (A, B=3d‐transition metals) are known to be highly active and efficient catalysts for water oxidation and suggested as inexpensive and alternatives to precious noble metal catalysts . For instance, nickel cobaltite (NiCo 2 O 4 ) stands out as a promising electrocatalyst for water oxidation due to its overwhelming benefits such as abundant, huge specific surface area, high conductivity, strong corrosion resistance, low overpotential, more active sites and rich redox chemistry originated from the co‐existence of nickel and cobalt ions .…”

Section: Introductionmentioning

confidence: 99%

Hierarchically Organized NiCo₂O₄ Microflowers Anchored on Multiwalled Carbon Nanotubes: Efficient Bifunctional Electrocatalysts for Oxygen and Hydrogen Evolution Reactions

et al. 2020

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Hierarchical flower-like NiCo 2 O 4 anchored on multiwalled carbon nanotubes (NiCo 2 O 4 -MCNTs) act as robust bifunctional electrocatalysts towards O 2 (OER) and H 2 (HER) evolution reactions. The NiCo 2 O 4 -MCNTs hybrid is synthesized in a facile surfactant-free hydrothermal process, and its flower-like morphology was shown to consist of 1D nanowires. The MCNT support is beneficial for enhanced reactive sites, efficient charge transfer, and durability of the composite. The material shows low overpotentials of 350 mV and 209 mV for OER and HER, respectively at 10 mA cm À 2 . Such values are comparable to contemporary noble-metal catalysts and even lower than reported non-precious catalysts. Moreover, this hybrid shows high current density, lower Tafel slope, and excellent stability. The synergistic coupling effects between the MCNTs and NiCo 2 O 4 are key factors for the superior catalytic activity of these hybrid materials.[a] Dr. blocking electrodes were laid on both sides of the pellet by pressing at 200 MPa. The electrical conductivity (σ) of the samples at room temperature were obtained from the dc polarizations (current, I vs. time, t curves) in Figure S4, using the following Equations (1) and (2): 4 5 6 7 8

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Section: Introductionmentioning

confidence: 99%

Hierarchically Organized NiCo₂O₄ Microflowers Anchored on Multiwalled Carbon Nanotubes: Efficient Bifunctional Electrocatalysts for Oxygen and Hydrogen Evolution Reactions

et al. 2020

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“…[28,29] The improvement of the OER performance of hollow structural materials is due to the large number of active sites exposed to surface reactions and the improvement of contact with the electrolyte. [30][31][32][33][34] Herein, we successfully synthesizedP BA@POM nanocubes using PBA as initial structures via ao ne-step hydrothermals ynthesis. Moreover,t he attachment of POMs successfully forms the PBA@POM hybrid with ad istinctive hollow framework.…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, the amorphous surface of a porous structure also contributes to the enhancement of the OER performance . The improvement of the OER performance of hollow structural materials is due to the large number of active sites exposed to surface reactions and the improvement of contact with the electrolyte …”

Section: Introductionmentioning

confidence: 99%

PBA@POM Hybrids as Efficient Electrocatalysts for the Oxygen Evolution Reaction

Wang

Zhang

et al. 2019

Chemistry An Asian Journal

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To realize the effective conversion of renewable energy through water decomposition,e fficient electrocatalysts for the oxygen evolution reaction (OER) are essential. In this article, PBA@POM was successfully prepared with aP russian blue analogue (PBA) as the initial structure. Af acile hydrothermalp rocess is reported for obtaining PBA@POM by etching the cubic PBA with as trong Brønsted acid, H 3 PMo 12 O 40 (HPMo). The hollow cube structure not only exposes more active sites but also promotes electron transport, whichr esultsi ne xcellent electrocatalytic activity for the OER. Compared with the PBA, which initially simply adhered to POM, the optimum PBA@POM hybrids display remarkably enhanced OER catalytic activity,w ith an almost constant overpotential of 440 mV at a current density of 10 mA cm À2 andasmall Ta fel slope (23.45 mV dec À1 ). The facilelyp repared PBA@POM with good electrochemical activity and stabilityp romises great potential for the OER.Supporting information and the ORCID identification number(s) for the author(s) of this article can be found under: https://doi.

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“…Different metal oxide hollow nanofibers were successfully synthesized by Macedo's group with this method using PVP as the sacrificing template, and exhibited promising OER performance. [ 91–93 ]…”

Section: Oxygen Electrocatalysts Derived From Fibrous Organic Sourcesmentioning

confidence: 99%

“…Different metal oxide hollow nanofibers were successfully synthesized by Daniel's group with this method using PVP as the sacrificing template, and exhibited promising OER performance. [91][92][93] Different from complete decomposition of PVP at high temperature thermal treatment, PVP can be partially remained during a lower temperature synthesis to become carbon substrate. [94] Li et al applied a two-step annealing process (air stabilization at 250 ℃ , then N 2 heating at 600 ℃ ) to the Co and Fe containing PVP nanofibers, and the resulted composite material exhibited excellent OER performance with a potential at 10 mA/cm 2 only 7 mV negative than commercial RuO 2 catalyst.…”

Section: Pvpmentioning

confidence: 99%

Fibrous‐Structured Freestanding Electrodes for Oxygen Electrocatalysis

Jiang

Fang

et al. 2019

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Electrocatalysts used for oxygen reduction and oxygen evolution reactions are critical materials in many renewable‐energy devices, such as rechargeable metal–air batteries, regenerative fuel cells, and water‐splitting systems. Compared with conventional electrodes made from catalyst powders, oxygen electrodes with a freestanding architecture are highly desirable because of their binder‐free fabrication and effective elimination of catalyst agglomeration. Among all freestanding electrode structures that have been investigated so far, fibrous materials exhibit many unique advantages, such as a wide range of available fibers, low material and material‐processing costs, large specific surface area, highly porous structure, and simplicity of fiber functionalization. Recent advances in the use of fibrous structures for freestanding electrocatalytic oxygen electrodes are summarized, including electrospun nanofibers, bacterial cellulose, cellulose fibrous structures, carbon clothes/papers, metal nanowires, and metal meshes. After detailed discussion of common techniques for oxygen electrode evaluation, freestanding electrode fabrication, and their electrocatalytic performance, current challenges and future prospects are also presented for future development.

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1D hollow MFe2O4 (M = Cu, Co, Ni) fibers by Solution Blow Spinning for oxygen evolution reaction

Cited by 112 publications

References 47 publications

Hierarchically Organized NiCo₂O₄ Microflowers Anchored on Multiwalled Carbon Nanotubes: Efficient Bifunctional Electrocatalysts for Oxygen and Hydrogen Evolution Reactions

Hierarchically Organized NiCo₂O₄ Microflowers Anchored on Multiwalled Carbon Nanotubes: Efficient Bifunctional Electrocatalysts for Oxygen and Hydrogen Evolution Reactions

PBA@POM Hybrids as Efficient Electrocatalysts for the Oxygen Evolution Reaction

Fibrous‐Structured Freestanding Electrodes for Oxygen Electrocatalysis

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1D hollow MFe2O4 (M = Cu, Co, Ni) fibers by Solution Blow Spinning for oxygen evolution reaction

Cited by 112 publications

References 47 publications

Hierarchically Organized NiCo2O4 Microflowers Anchored on Multiwalled Carbon Nanotubes: Efficient Bifunctional Electrocatalysts for Oxygen and Hydrogen Evolution Reactions

Hierarchically Organized NiCo2O4 Microflowers Anchored on Multiwalled Carbon Nanotubes: Efficient Bifunctional Electrocatalysts for Oxygen and Hydrogen Evolution Reactions

PBA@POM Hybrids as Efficient Electrocatalysts for the Oxygen Evolution Reaction

Fibrous‐Structured Freestanding Electrodes for Oxygen Electrocatalysis

Contact Info

Product

Resources

About

1D hollow MFe2O4 (M = Cu, Co, Ni) fibers by Solution Blow Spinning for oxygen evolution reaction

Hierarchically Organized NiCo₂O₄ Microflowers Anchored on Multiwalled Carbon Nanotubes: Efficient Bifunctional Electrocatalysts for Oxygen and Hydrogen Evolution Reactions

Hierarchically Organized NiCo₂O₄ Microflowers Anchored on Multiwalled Carbon Nanotubes: Efficient Bifunctional Electrocatalysts for Oxygen and Hydrogen Evolution Reactions