Construction of FeOOH modified CoMxOy (M = Mo, W, V) on nickel foam for highly efficient oxygen evolution reaction

wen, tingting; Wang, Limin; Gong, Yaqiong

doi:10.1039/d2se01553f

Cited by 5 publications

(3 citation statements)

References 58 publications

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“…The solution resistance (Rs) denotes the intersection of the semicircle in the high frequency region with the x-axis. The charge transfer resistance (Rct) indicates the charge transfer rate, and the size is the diameter of the semicircle [38]. The smaller the diameter of the semicircular arc, the smaller the resistance to electron transfer, the faster the rate of electron movement, and the better the conductivity of the material modified on the electrode surface.…”

Section: Electrochemical Characterization Of Electrodesmentioning

confidence: 99%

Electrochemical study of the Cu2+ sensor based on ZIF-67/MWCNTs/Nafion

Ding,

Song,

et al. 2024

Preprint

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In this work, a ZIF-67/MWCNTs/Nafion sensor platform was constructed based on the good adsorption capacity of ZIF-67, the electrical conductivity of multiwalled carbon nanotubes (MWCNTs) and the excellent chemical stability of Nafion for the detection of Cu2+ in water. Meanwhile, the modified materials were characterized by scanning electron microscopy (SEM), Transmission electron microscopy (TEM), BET specific surface area test, X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and Fourier transform infrared spectrometry (FT-IR). Cyclic voltammetry (CV), electrochemical impedance (EIS), and square wave solvation voltammetry (SWSV) electrochemical methods were used to perform applied test studies on ZIF-67/MWCNTs/Nafion/GCE. The results show that ZIF-67/MWCNTs/Nafion/GCE has high sensitivity (57.5 μA/μM) and a low limit of detection (15.0 nM) for the electrochemical detection of Cu2+ ions in an electrochemical sensing system. It has high adsorption selectivity for Cu2+, and the recovery of Cu2+ in real water reached 98.6%-103%. The modified electrode has good repeatability, reproducibility, anti-interference, and stability, which makes this sensing platform can be practically applied to the detection of domestic water.

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Section: Electrochemical Characterization Of Electrodesmentioning

confidence: 99%

Electrochemical study of the Cu2+ sensor based on ZIF-67/MWCNTs/Nafion

Ding,

Song,

et al. 2024

Preprint

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“…Efforts have been made to explore the possibility of utilizing earth-abundant TM-based compounds, such as transition metal sulfides, phosphides, oxides, hydroxides, nitrides, carbides and their combinations, as bifunctional catalysts for electrochemical water splitting. Bifunctional electrocatalysts that can concurrently catalyze both the HER and OER in alkaline media, significantly improve the efficiency of water splitting, and accelerate the alkaline water splitting process. − However, the widespread use of TM-based electrocatalysts for sustainable hydrogen production is still limited by their poor conductivity and low stability . The use of carbon nanomaterials, such as carbon dots, graphite, and carbon nanotubes, in combination with TMs has gained significant attention as electrocatalysts for both the OER and HER due to their excellent stability and conductivity. , These hybrids not only retain the properties of their individual components but also exhibit new characteristics derived from the synergy between TMs and carbon nanomaterials. , Significant efforts have been made to design and synthesize efficient OER and HER catalysts using earth-abundant TMs.…”

Section: Introductionmentioning

confidence: 99%

Ultra-efficient Nitrogen-Doped Carbon Dots-Supported Nickel Sulfide as a Platinum-Free Electrocatalyst for Overall Water Splitting in Basic Medium

Pitchai,

Gopalakrishnan,

Chen

2024

Energy Fuels

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The utilization of exceptionally efficient and long-lasting electrocatalysts made from platinum-free materials holds immense promise for mitigating the energy crisis through the production of H 2 and O 2 via water splitting applications. In this study, a facile hydrothermal method was used to synthesize nitrogen-doped carbon dots (NDCDs) from Luf fa acutangula and α-NiS@NDCDs composite from NDCDs, nickel nitrate, and thiourea. The resulting α-NiS@ NDCDs composite was characterized using various analytical techniques, such as HR-TEM, EDS, XPS, XRD, and FT-IR. The electrocatalytic hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and overall water splitting reaction (OWS) of NDCDs, α-NiS, and α-NiS@NDCDs composite were evaluated by linear sweep voltammetry, Tafel, chronopotentiometry, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) in 1 M KOH. Remarkably, the α-NiS@NDCDs composite exhibited excellent catalytic activity toward the HER, OER, and OWS, requiring only a low overpotential to achieve a current density of 10 mA cm −2 . Furthermore, the greater stability (40 h) of the synthesized α-NiS@NDCDs composite was assessed by chronopotentiometry at a constant current density of 10 mA cm −2 . Overall, the synthesized α-NiS@NDCDs composite exhibited promising electrocatalytic activity for the HER, OER, and OWS, highlighting its potential application in energy conversion. The present work confirmed the utility (173 mV, 1.4972 V, and 1.6114 V for the HER, OER, and OWS, respectively) of the α-NiS@NDCDs composite as a promising electrocatalyst for overall water splitting reactions.

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“…Transition metal-based catalysts are thought to be the most potential substitutes because of their inexpensiveness and large natural abundance. 10,11 Nickel-based electrocatalysts have attracted more and more attention due to their low cost and excellent HER properties, becoming important non-noble metal catalysts. [12][13][14] In recent years, many nickel-based electrocatalysts have been developed to improve catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

A self-supported porous NiMo electrocatalyst to boost the catalytic activity in the hydrogen evolution reaction

Kong,

Li,

Zhao

et al. 2024

Dalton Trans.

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Construction of FeOOH modified CoM_xO_y (M = Mo, W, V) on nickel foam for highly efficient oxygen evolution reaction

Abstract: Oxygen evolution reaction (OER) are considered as rate-determining steps of various energy conversion processes, such as decomposition of water to produce hydrogen, conversion of carbon dioxide and metal-air cell and...

Cited by 5 publications

References 58 publications

Electrochemical study of the Cu<sup>2+</sup> sensor based on ZIF-67/MWCNTs/Nafion

Electrochemical study of the Cu<sup>2+</sup> sensor based on ZIF-67/MWCNTs/Nafion

Ultra-efficient Nitrogen-Doped Carbon Dots-Supported Nickel Sulfide as a Platinum-Free Electrocatalyst for Overall Water Splitting in Basic Medium

A self-supported porous NiMo electrocatalyst to boost the catalytic activity in the hydrogen evolution reaction

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