Effect of Copper Alloying on Electro-Catalytic Activity of Nickel for Ethanol Oxidation in Alkaline Media

Panah, Niloufar Bahrami; Danaee, I.; Payehghadr, Mahmood; Madahi, Afrooz

doi:10.17344/acsi.2017.3953

Cited by 11 publications

(7 citation statements)

References 33 publications

(40 reference statements)

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“…According to the fitted curve, the diffusion current followed Cottrellian behavior. 44 In addition, as the mass percentage of Cl-GQDs was changed from 1% to 5%, the photocurrent density of Cl-GQDs/In 2 O 3 was increased and then decreased. It was because Cl-GQDs of 1 wt%, 3 wt% and 5 wt% had a "positive effect" that could facilitate the separation of photogenerated carriers and store photogenerated electrons.…”

Section: Resultsmentioning

confidence: 97%

Photoelectrochemical Behavior of Simple Synthesized Cl-GQDs/In₂O₃

Li¹,

Wang²,

Lei³

et al. 2022

J. Electrochem. Soc.

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The morphology and optical properties of simple synthesized chlorine-doped graphene quantum dots (Cl-GQDs) were synthesized by transmission electron microscopy, photoluminescence, and UV-vis spectrometry. The Cl-GQDs/In2O3 were synthesized by an ultrasonic treatment and the morphology, structure and composition, band gap, and surface area were analyzed by different techniques. The effect of the mass percentage of Cl-GQDs on the photoelectrochemical (PEC) behavior of In2O3 was investigated, and the results showed that 3 wt% Cl-GQDs could effectively improve the separation of photogenerated carriers. Moreover, the photocurrent density of 3 wt% Cl-GQDs/In2O3 was about ten times that of pure In2O3. Cyclic voltammetry measurements of Cl-GQDs/In2O3 under dark and light were compared to further investigate the capacitive effect of Cl-GQDs, and the results indicated that Cl-GQDs could store photogenerated electrons, inhibiting the recombination of electron-hole pairs. This work was expected to be helpful for enhancing the PEC performance of In2O3 and extending the application of Cl-GQDs.

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Section: Resultsmentioning

confidence: 97%

Photoelectrochemical Behavior of Simple Synthesized Cl-GQDs/In₂O₃

Li¹,

Wang²,

Lei³

et al. 2022

J. Electrochem. Soc.

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“…A cyclic voltammogram curve is obtained by plotting current versus potential. In the ensuing cyclic voltammogram, there are two distinct regions: anodic (positive current values) and cathodic (negative current values), which represent the oxidation and reduction reactions, respectively [35]. On this graph, the peak current indicates the potential at which the electrode reactions occur.…”

Section: Band-bending In Tmc and Tmh Heterostructures Synthesized By ...mentioning

confidence: 99%

Enhanced interfacial charge transfer on strain-induced 2D-1D/MoS₂-TiO₂ heterostructures for electrochemical and photocatalytic applications

Bamola¹,

Rawat²,

Tanwar³

et al. 2022

Nanotechnology

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2D/1D-MoS2/TiO2 heterostructures have proven to be vigorous for photocatalytic applications. The enhancement in photocatalytic activity of heterostructures may get influenced by the accumulation of strain at the interface that affects the interfacial interaction. Keeping that in view, present paper reports the strain accumulated interfacial modification of 2D/1D-MoS2/TiO2 heterostructures for the enhancement of photocatalytic activity. Two different synthesis methods such as hydrothermal and chemical vapour deposition (CVD) method are used for the growth of MoS2 on TiO2 nanostructures. Micro-Raman spectroscopy revealed that strain is accumulated at the interface on growth of MoS2 over TiO2 nanostructures. It is further revealed that the MoS2/TiO2 heterostructure synthesized by CVD method induces compressive strain. Also, heterostructures synthesize by hydrothermal method induces tensile strain that modify the charge separation at the interface, which was further confirmed by X-ray photoelectron spectroscopy (XPS). Moreover, ultraviolet photoelectron spectroscopy (UPS) revealed that the upward band bending in the MoS2/TiO2 heterostructures synthesized by hydrothermal method. Similarly, heterostructure synthesized by chemical vapour method (CVD) shows the downward band bending that leads to the improved charge separation at interface. The modified interface of heterostructures is further studied for electrochemical measurement using cyclic voltammetry (CV) and photocatalytic activity by degradation of model compound.

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“…Although nickel possesses electrocatalytic properties, and due to these properties is often used in industry, the overvoltage of hydrogen evolution (HER) on the nickel electrode is quite high, causing an increase in the energy consumption during its use. Therefore, in order to reduce overvoltage, nickel is often doped with other elements such as Mo [11], Co [12], P [13], Cu [14], etc. Besides, the results of water electrolysis on titanium and molybdenum electrodes from neutral (NaCl) and alkaline (NaOH) electrolytes showed that addition of Mo(VI) ions into the electrolyte activated HER [15].…”

Section: Introductionmentioning

confidence: 99%

Study of electrochemical deposition of Ni-Mo thin films from alkaline electrolytes

Gurbanova

Бабанлы

Huseynova

et al. 2020

J. Electrochem. Sci. Eng.

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The process of co-deposition of Ni with Mo from alkaline electrolytes was studied by taking linear and cyclic polarization curves of Pt electrode at various concentrations of initial components and potential scan rates. Solutions of Na2MoO4∙2H2O and NiSO4∙7H2O were used as sources of ions of the main components in NH4OH electrolyte. It was found that co-deposition of nickel with molybdenum goes through the oxide formation stage, and a solid solution of these two metals is deposited on the cathode surface. The film obtained at constant current on Ni electrode under optimal conditions was found amorphous, but additional thermal treatment at 500 °C for one hour made it polycrystalline. This was confirmed by peaks in X-ray diffraction patterns, corresponding to NiMoO4, Ni, and MoO3. The proposed electrolyte and electrolysis conditions allow to obtain thin films with molybdenum content ranging from 17.1 to 50.9 at.%. The co-deposition of Ni with Mo is limited by diffusion of these ions to the cathode surface. The knowledge of the mechanism of co-deposition of Ni and Mo will make possible a selection of optimal conditions for deposition of alloys of the required composition with satisfactory electrocatalytic properties.

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Effect of Copper Alloying on Electro-Catalytic Activity of Nickel for Ethanol Oxidation in Alkaline Media

Cited by 11 publications

References 33 publications

Photoelectrochemical Behavior of Simple Synthesized Cl-GQDs/In₂O₃

Photoelectrochemical Behavior of Simple Synthesized Cl-GQDs/In₂O₃

Enhanced interfacial charge transfer on strain-induced 2D-1D/MoS₂-TiO₂ heterostructures for electrochemical and photocatalytic applications

Study of electrochemical deposition of Ni-Mo thin films from alkaline electrolytes

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Effect of Copper Alloying on Electro-Catalytic Activity of Nickel for Ethanol Oxidation in Alkaline Media

Cited by 11 publications

References 33 publications

Photoelectrochemical Behavior of Simple Synthesized Cl-GQDs/In2O3

Photoelectrochemical Behavior of Simple Synthesized Cl-GQDs/In2O3

Enhanced interfacial charge transfer on strain-induced 2D-1D/MoS2-TiO2 heterostructures for electrochemical and photocatalytic applications

Study of electrochemical deposition of Ni-Mo thin films from alkaline electrolytes

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Product

Resources

About

Photoelectrochemical Behavior of Simple Synthesized Cl-GQDs/In₂O₃

Photoelectrochemical Behavior of Simple Synthesized Cl-GQDs/In₂O₃

Enhanced interfacial charge transfer on strain-induced 2D-1D/MoS₂-TiO₂ heterostructures for electrochemical and photocatalytic applications