Enhancement of Stability and Specific Charge Capacity of Alpha‐Ni(OH)<sub>2</sub> by Mn(II) Isomorphic Substitution

Gomes, Allan P.; Gonçalves, Josué M.; Araki, Koji; Martins, Paulo Roberto

doi:10.1002/ente.201800980

Cited by 11 publications

(7 citation statements)

References 43 publications

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“…More interesting, with the increase of iron doping content, the reflection intensity at 2θ=19.3° belonging to β ‐Ni(OH) 2 gradually weakens and eventually disappears, completely becoming the isostructural α ‐Ni(OH) 2 phase. This phenomenon demonstrates that Fe dopants can stabilize the α ‐Ni(OH) 2 phase . Besides, no iron oxide/(oxy)hydroxide phase can be found from XRD patterns, indicating that Fe is incorporated into the Ni(OH) 2 matrix successfully.…”

Section: Resultsmentioning

confidence: 89%

Atomic Insights of Iron Doping in Nickel Hydroxide Nanosheets for Enhanced Oxygen Catalysis to Boost Broad Temperature Workable Zinc−Air Batteries

Yang

Zhang

et al. 2019

ChemCatChem

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Exploring robust and low-cost bifunctional oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) electrocatalysts is of great importance for zincÀ air batteries (ZABs). Here, we report a controllable Fe-doping strategy to promote OER/ORR catalytic performance of Ni(OH) 2 . The results reveal that Ni 1-x Fe x (x = 0, 0.05, 0.1, 0.15, 0.2, and 0.25) hydroxide nanosheets (NSs) display a volcano-like OER performance, with Ni 0.8 Fe 0.2 NSs being the most optimal OER catalyst, showing an overpotential of 250 mV at 20 mA cm À 2 and excellent stability in 1 M KOH. Compared with pristine Ni(OH) 2 NSs, the enhanced OER/ORR performance of Ni 0.8 Fe 0.2 NSs can be attributed to the much more exposed edge sites and oxygen vacancies. Importantly, the rechargeable ZABs built by Ni 0.8 Fe 0.2 NSs can offer excellent charge-discharge cycling stability not only under 25°C, but also both the low temperature (À 10°C) and high temperature (40°C). The work provide a new way to design highly efficient air-electrode catalysts with broad working temperature.

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Section: Resultsmentioning

confidence: 89%

Atomic Insights of Iron Doping in Nickel Hydroxide Nanosheets for Enhanced Oxygen Catalysis to Boost Broad Temperature Workable Zinc−Air Batteries

Yang

Zhang

et al. 2019

ChemCatChem

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“…There are two apparent weight loss areas in the thermal gravimetric (TG) analysis plot of the Ni(OH) 2 as clearly detected in DSC curve. Below 150 °C, the 11.5% weight loss is caused by the abstraction of adsorbed water and intercalated water molecules, respectively [15,16]. In the temperature range of 150-400 °C, however, the sample continues to lose its weight slowly; as the temperature is increased to 220 °C the total weight loss reaches about 22%.…”

Section: Structural and Morphological Characterizationsmentioning

confidence: 99%

“…To enhance the cycling stability between α-Ni(OH) 2 and γ-NiOOH, many works have been performed on the partial substitution of metal ions for nickel in the lattice of Ni(OH) 2 ; e.g. Al-, Co-, Mn-, Zn-, Y-and Cu-substituted α-Ni(OH) 2 [15][16][17]. Furthermore, some studies have been performed on the coprecipitation of mixed α/β-Ni(OH) 2 [18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Simple deposition of mixed α, β-nickel hydroxide thin film onto nickel foam as high-performance supercapacitor electrode material

Mao

Zhou

Peng

2020

J Mater Sci: Mater Electron

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Here, uniform thin nanosheets' film of mixed α-and β-Ni(OH) 2 phases was cathodically electrodeposited onto nickel foam support and the fabricated electrode was utilized as binder-free electrode for supercapacitor applications. An additive-free aqueous electrolyte of 0.05 M nickel nitrate was used as the deposition bath, where the hydroxide film was prepared with only applying direct current of 10 mA/cm 2 in a two-electrode system while a uniform electrical field was established through using two counter electrodes parallel to nickel foam cathode. The morphology, crystalline phase and also specific surface area of the deposited nickel hydroxide film onto Ni foam were analyzed using field-emission scanning electron (FE-SEM) and X-ray diffraction (XRD) techniques as well as BET and FT-IR spectroscopy. These analyses proved that a mixed alpha and beta phases of Ni(OH) 2 with uniform nanosheets' morphology are grown onto the nickel foam cathode. The electrochemical investigations using CV, GCD and electrochemical impedance spectroscopy (EIS) manifested the designed electrode provides specific capacitance of 2143 F g −1 at a current density of 0.5 A g −1 with high rate capability of 65% by increasing the current density from 0.5 to 20 A g −1 as well as 90% and 74% cycling stability at the current densities of 5 and 15 A/g, respectively. The excellent electrochemical performance of the as-prepared electrode is ascribed to the simultaneous deposition of both α and β phases through using a facile electrochemical deposition method. The presence of α and β phases guarantees the high specific capacitance and high cycling stability of the prepared electrode, respectively.

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“…In the last decade, the sol-gel method reported by Tower (Tower, 1924) has been extensively explored in the preparation of monoand bimetallic hydroxides with a potential application, especially as electrochemical sensors (Azeredo et al, 2019;Azeredo et al, 2020) or electrodes for HSCs (Gonçalves et al, 2018a;Gomes et al, 2019). However, to the best of our knowledge, this is the first time that this method has been used to obtain multifunctional trimetallic hydroxides, reporting the unprecedented trimetallic NiVCe-based hydroxide (Figure 1A).…”

Section: Structural and Morphological Characterization Of Ni 1-x-y V X Ce Y -Layered Double Hydroxide Nanoparticlementioning

confidence: 99%

NiVCe-Layered Double Hydroxide as Multifunctional Nanomaterials for Energy and Sensor Applications

et al. 2021

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Multifunctional nanomaterials have been attracting increasing attention as solutions to the existing challenges in energy systems and sensing technologies. In this regard, multifunctional NiVCe-layered double hydroxide (NiVCe-LDH) nanoparticles were synthesized by the modified sol-gel method. The analysis of this material demonstrated excellent potential for its utilization as electrode materials for hybrid supercapacitor, oxygen evolution reaction (OER), and sensor applications. The NiVCe-LDH nanoparticles delivered a specific charge of 740 C g−1 at 10 A g−1 and decent rate performance (charge retention of 68.7% at 100 A g−1), showing excellent prospects as electrode material for hybrid energy storage devices. In addition, NiVCe-LDH nanoparticles have also been successfully applied as a proof-of-concept for OER, as confirmed by their low Tafel slope of 47 mV dec−1. Finally, trimetallic NiVCe-LDH-based screen-printed electrodes were developed for the sensing of hydrogen peroxide directly in a real complex mouthwash sample, achieving a satisfactory recovery value of around 98% using a fast and simple batch injection analysis procedure. These results allow us to predict the great potential of this trimetallic hydroxide for building electrochemical sensors with good perspectives as electroactive material for OER processes and energy storage technologies.

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Enhancement of Stability and Specific Charge Capacity of Alpha‐Ni(OH)₂ by Mn(II) Isomorphic Substitution

Cited by 11 publications

References 43 publications

Atomic Insights of Iron Doping in Nickel Hydroxide Nanosheets for Enhanced Oxygen Catalysis to Boost Broad Temperature Workable Zinc−Air Batteries

Atomic Insights of Iron Doping in Nickel Hydroxide Nanosheets for Enhanced Oxygen Catalysis to Boost Broad Temperature Workable Zinc−Air Batteries

Simple deposition of mixed α, β-nickel hydroxide thin film onto nickel foam as high-performance supercapacitor electrode material

NiVCe-Layered Double Hydroxide as Multifunctional Nanomaterials for Energy and Sensor Applications

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Enhancement of Stability and Specific Charge Capacity of Alpha‐Ni(OH)2 by Mn(II) Isomorphic Substitution

Cited by 11 publications

References 43 publications

Atomic Insights of Iron Doping in Nickel Hydroxide Nanosheets for Enhanced Oxygen Catalysis to Boost Broad Temperature Workable Zinc−Air Batteries

Atomic Insights of Iron Doping in Nickel Hydroxide Nanosheets for Enhanced Oxygen Catalysis to Boost Broad Temperature Workable Zinc−Air Batteries

Simple deposition of mixed α, β-nickel hydroxide thin film onto nickel foam as high-performance supercapacitor electrode material

NiVCe-Layered Double Hydroxide as Multifunctional Nanomaterials for Energy and Sensor Applications

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Enhancement of Stability and Specific Charge Capacity of Alpha‐Ni(OH)₂ by Mn(II) Isomorphic Substitution