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Hydrogen evolution reaction at Ru-modified nickel-coated carbon fibre in 0.1 M NaOH

100%
Pierożyński B., Mikołajczyk T.
Polish Journal of Chemical Technology
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2015
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vol. 17
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issue 1
18-22
EN
The electrochemical activity towards hydrogen evolution reaction (HER) was studied on commercially available (Toho-Tenax) and Ru-modified nickel-coated carbon fibre (NiCCF) materials. Quality and extent of Ru electrodeposition on NiCCF tows were examined by means of scanning electron microscopy (SEM). Kinetics of the hydrogen evolution reaction were investigated at room temperature, as well as over the temperature range: 20-50°C in 0.1 M NaOH solution for the cathodic overpotential range: -100 to -300 mV vs. RHE. Corresponding values of charge-transfer resistance, exchange current-density for the HER and other electrochemical parameters for the examined fibre tow composites were recorded.
2
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Kinetics of electrooxidation of phenol on polycrystalline platinum

81%
Pierożyński B., Piotrowska G., Mikołajczyk T.
Polish Journal of Chemical Technology
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2015
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vol. 17
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issue 2
126-130
EN
This work reports on kinetics of phenol electrooxidation reaction (PhER), examined at polycrystalline Pt electrode in 0.5 M H2SO4 and 0.1 M NaOH supporting solutions. Important aspects of PhER kinetics were analysed based on potential-dependent, a.c. impedance-derived values of charge-transfer resistance and capacitance parameters. Special attention was also given to the influence of supporting electrolyte ions on the process of phenol oxidation (pH dependence of the PhER), in relation to an important role of anion adsorption on the Pt catalyst surface.
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Ethanol oxidation reaction at Pd-modified nickel foam obtained by PVD method

81%
Mikołajczyk T., Turemko M., Pierożyński B.
Polish Journal of Chemical Technology
|
2015
|
vol. 17
|
issue 2
47-50
EN
In this study, palladium-modified nickel foam substrate was applied to examine ethanol oxidation reaction (EOR) in 0.1 M NaOH supporting solution. An EOR catalyst was prepared by physical vapour deposition (PVD) of palladium onto Ni foam material. Temperature-dependent kinetics of the EOR were studied over the temperature range: 20-60°C by means of a.c. impedance spectroscopy and cyclic voltammetry techniques. Deposition of a noble metal additive was clearly exposed through scanning electron microscopy: SEM/EDX-supported analysis. Most importantly, this work investigated the effect of pre-deposited fullerene on nickel foam, on the catalytic (EOR) properties of such-produced Ni foam/Pd composite material.
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