Electrocatalytic Oxidation of Sodium Borohydride on a Nanoporous Ni/Zn-Ni Electrode

Hosseini, Mir Ghasem; Abdolmaleki, Mehdi; Ashrafpoor, Sajjad

doi:10.1016/s1872-2067(11)60464-6

Cited by 27 publications

(19 citation statements)

References 63 publications

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“…It should be added that in Figure b the background current densities are subtracted from the current densities of NaBH 4 oxidation. As everyone knows, the Ni 2+ /Ni 3+ redox couple acts as a catalyst for the oxidation of borohydride . The oxidation of Ni(OH) 2 to NiOOH on Ni‐2 sample is started at a less positive potential (Figure ).…”

Section: Resultsmentioning

confidence: 74%

“…The Nyquist diagrams with a semicircle have previously been observed for the borohydride oxidation on Ni electrodes,, on glassy carbon and bulk Au electrodes, and methanol oxidation on Ni nanoparticles supported on TiO 2 nanotubes . The diameter of the semicircle presents the charge transfer resistance ( R ct ) related to the borohydride oxidation.…”

Section: Resultsmentioning

confidence: 89%

“…A anodic peak around 0.48 V, 0.43 V, and 0.48 V is observed for Ni‐1, Ni‐2, and Ni‐3 samples, respectively, which is attributed to the oxidation of Ni(OH) 2 to NiOOH. In the cathodic scan, the observed peak for three samples is related to the reduction of Ni 3+ to Ni 2+ . It should be mentioned that the anodic peak potential for Ni‐2 sample is shifted about 50 mV toward less positive potentials and giving lower currents compared to the Ni‐1 and Ni‐3 samples.…”

Section: Resultsmentioning

confidence: 99%

“…It should be mentioned that the anodic peak potential for Ni‐2 sample is shifted about 50 mV toward less positive potentials and giving lower currents compared to the Ni‐1 and Ni‐3 samples. It is probably due to the changes in the surface features as well as different real surface areas of the samples as reported in the previous studies ,…”

Section: Resultsmentioning

confidence: 99%

“…According to the above discussion, two mechanisms including a stepwise oxidation mechanism and a parallel oxidation/hydrolysis mechanism have been proposed for the NaBH 4 oxidation on the Ni and Ni based electrodes ,, . In the stepwise mechanism,

{BH}_{4}^{-}

first dissociates via steps (1, 3, 5, 7) of scheme .…”

Section: Resultsmentioning

confidence: 99%

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Surfactant‐Assisted Electrodeposition of Nickel Nanostructures and Their Electrocatalytic Activities Toward Oxidation of Sodium Borohydride, Ethanol, and Methanol

2019

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Different Ni nanostructures were electrodeposited from the Watts bath in the presence of different concentrations of sodium dodecyl sulfate (SDS) using the pulse reverse current technique on the copper substrate. The concentration of SDS was lower than the critical micelle concentration (CMC), equal to CMC and higher than CMC for electrodeposition of Ni‐1, Ni‐2, and Ni‐3 samples respectively. The electrodeposited samples were characterized by X‐ray diffraction (XRD), atomic force microscopy (AFM), and field emission‐scanning electron microscopy (FE‐SEM) techniques. The electrocatalytic activity of samples for oxidation of sodium borohydride, ethanol, and methanol was investigated using cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). For borohydride oxidation, one oxidation peak, as well as one semicircle, observed respectively in the cyclic voltammograms and Nyquist diagrams confirmed that only one reaction happened on the surface of samples. It was observed that at high overpotentials, Ni‐1 sample was more reactive for NaBH4 oxidation compared to the Ni‐2 and Ni‐3 samples.

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Section: Resultsmentioning

confidence: 74%

Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

{BH}_{4}^{-}

first dissociates via steps (1, 3, 5, 7) of scheme .…”

Section: Resultsmentioning

confidence: 99%

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Surfactant‐Assisted Electrodeposition of Nickel Nanostructures and Their Electrocatalytic Activities Toward Oxidation of Sodium Borohydride, Ethanol, and Methanol

2019

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Gold‐Nanoparticles‐Decorated ZrO₂‐CuO Nanocomposites: Synthesis, Characterization and A Novel Platform for Electrocatalytic Formaldehyde Oxidation

et al. 2022

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In this study, gold nanoparticles decorated copper oxide‐ zirconium oxide mixture has been deposited on glassy carbon electrode surface by simple electrochemical technique. The obtained composite surface has been investigated by electrochemical impedance spectroscopy, scanning electron microscopy, energy dispersive X‐ray spectroscopy, X‐ray diffraction spectroscopy, X‐ray photoelectron spectroscopy in detail. The results of SEM images, XPS and XRD data indicated the surface of ZrO2‐CuO composite was successfully decorated with Au nanoparticles. The resulting ZrO2‐CuO/Au nanocomposite contained about 1.48 % Au nanoparticles with 70 nm average diameter. Then, the catalytic performance of ZrO2‐CuO/Au nanocomposites was investigated by using formaldehyde oxidation. The comparative studies have been revealed that the ZrO2‐CuO/Au nanocomposites exhibited a better current density towards formaldehyde oxidation than that of bare, ZrO2‐CuO, and Au modified electrodes in alkaline media. According to the best of our knowledge, this is the first study dealing with the usage of ZrO2‐CuO/Au nanocomposites in formaldehyde oxidation. As the electrochemically fabricated, stable ZrO2‐CuO/Au surface improved catalytic activity towards formaldehyde oxidation, this material is a promising candidate for application in fuel cells and removal of formaldehyde from aqueous solutions.

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Pt hollow nanospheres/graphene electrocatalytic ability toward sodium borohydride oxidation: a study of morphology effect on electrocatalytic activity

Valiollahi

Ojani

2016

J Appl Electrochem

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Electrocatalytic Oxidation of Sodium Borohydride on a Nanoporous Ni/Zn-Ni Electrode

Cited by 27 publications

References 63 publications

Surfactant‐Assisted Electrodeposition of Nickel Nanostructures and Their Electrocatalytic Activities Toward Oxidation of Sodium Borohydride, Ethanol, and Methanol

Surfactant‐Assisted Electrodeposition of Nickel Nanostructures and Their Electrocatalytic Activities Toward Oxidation of Sodium Borohydride, Ethanol, and Methanol

Gold‐Nanoparticles‐Decorated ZrO₂‐CuO Nanocomposites: Synthesis, Characterization and A Novel Platform for Electrocatalytic Formaldehyde Oxidation

Pt hollow nanospheres/graphene electrocatalytic ability toward sodium borohydride oxidation: a study of morphology effect on electrocatalytic activity

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Electrocatalytic Oxidation of Sodium Borohydride on a Nanoporous Ni/Zn-Ni Electrode

Cited by 27 publications

References 63 publications

Surfactant‐Assisted Electrodeposition of Nickel Nanostructures and Their Electrocatalytic Activities Toward Oxidation of Sodium Borohydride, Ethanol, and Methanol

Surfactant‐Assisted Electrodeposition of Nickel Nanostructures and Their Electrocatalytic Activities Toward Oxidation of Sodium Borohydride, Ethanol, and Methanol

Gold‐Nanoparticles‐Decorated ZrO2‐CuO Nanocomposites: Synthesis, Characterization and A Novel Platform for Electrocatalytic Formaldehyde Oxidation

Pt hollow nanospheres/graphene electrocatalytic ability toward sodium borohydride oxidation: a study of morphology effect on electrocatalytic activity

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Gold‐Nanoparticles‐Decorated ZrO₂‐CuO Nanocomposites: Synthesis, Characterization and A Novel Platform for Electrocatalytic Formaldehyde Oxidation