Pt/CNDs-TiO 2 electrocatalyst for direct alcohol fuel cells
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Chronoamperometry
Linear sweep voltammetry
Alcohol Oxidation
Chronoamperometry
Cobalt hydroxide
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Chronoamperometry
Linear sweep voltammetry
Ultramicroelectrode
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PtRu /MWCNTs anodic catalyst was synthesized by hydrothermal treatment.The electrocatalytic oxidation of methanol was studied by cyclic voltammetry,linear sweep voltammetry,chronoamperometry and impendance spectroscopy.It was found that PtRu/MWCNTs catalysts synthesized in hydrothermal condition had higher electrocatalytic activities and better tolerance to poisoning species in methanol oxidation than that of PtRu/Vulcan XC-72.
Chronoamperometry
Linear sweep voltammetry
Hydrothermal Synthesis
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In this paper, ceria (CeO2) nanorod (NR) supported Ni-Cr2O3 anode electrocatalysts were synthesized as nonnoble metal-based anode electrocatalysts for ethanol electrooxidation reaction (EOR) in alkaline media. Physicochemical characterization of the electrocatalysts was investigated by XRD, SEM, and TEM techniques. Electrochemical performances of the catalysts were investigated via cyclic voltammetry (CV), linear sweep voltammetry (LSV), and chronoamperometry (CA) techniques. The data from linear LSV were used for the diffusion coefficient of the electrocatalysts. The CA experiments' results showed the tolerance for catalytic poisoning and durability of the synthesized electrocatalysts.
Chronoamperometry
Linear sweep voltammetry
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A gas diffusion electrode type arrangement was employed to evaluate carbon supported Pb, Bi and Sn nanopowders as electrocatalysts for electrochemical reduction of carbon dioxide in alkaline media (0.5 M NaHCO3). The structural analysis, shape and topographical characterization, and the surface composition analysis of the catalysts were performed by XRD, SEM, TEM and XPS, respectively. The electrochemical techniques used were cyclic voltammetry, linear sweep voltammetry and chronoamperometry. Cyclic voltammetry was used to study the basic redox properties of the surface, while linear sweep was used to measure the response in argon and carbon dioxide saturated solutions. Chronoamperometry was carried out at four potentials to compare the products and their rate of formation for all the catalysts at ambient temperature and pressure. The formate production rate was observed to be highest for lead among the three catalysts evaluated. The value obtained was 0.576 mmol/h at −1.94 V vs RHE with a Faradaic efficiency of ∼ 30%. Further, the activity was found to be stable during the electrolysis and the current density was almost ∼35 mA/cm2geo. Based on the experiments conducted in this study, a comparative result of activity towards CO2 electroreduction to formate was concluded as Pb > Bi > Sn.
Chronoamperometry
Linear sweep voltammetry
Carbon fibers
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Chronoamperometry
Linear sweep voltammetry
Direct-ethanol fuel cell
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The diffusion coefficient of isopropanol in alkaline medium using electrochemical methods on Pd electrode has been studied by linear sweep voltammetry (LSV) with different sweep rate and chronoamperometry in 1.0 M KOH solution containing 1.0 M isopropanol. Isopropanol oxidation on the Pd electrode is an irreversible charge-transport process and controlled by a diffusion process. The diffusion coefficient of isopropanol on the Pd electrode is obtained as 1.01 � 10 -6 cm 2 s -1 using the LSV method and 1.06 � 10 -6 cm 2 s -1 using the chronoamperometry method. The average diffusion coefficient of isopropanol is 1.04 � 10 -6 cm 2 s -1 .
Chronoamperometry
Linear sweep voltammetry
Charge transfer coefficient
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Modified graphite electrodes as potential cathodic electrocatalysts for microbial electrolysis cells
Microbial electrolysis cell (MEC) is an ecologically clean and innovative technology for hydrogen production. The development of cost-effective cathodes with high catalytic activity for hydrogen evolution reaction (HER) in nearneutral electrolytes is the most critical challenge for the practical application of MEC technology. In this study, graphite electrodes, functionalized with non-noble metal oxides, were produced and after electrochemical pre-treatment investigated as potential cathodes for MEC. The morphology of the developed materials was analyzed by scanning electron microscopy (SEM). Their electrochemical performance in neutral phosphate buffer solution (PBS) was explored by means of linear sweep voltammetry (LSV) and chronoamperometry (CA). The results from both methods show that all modified electrodes exhibit higher electrocatalytic activity towards HER than that of bare graphite, which is a prerequisite for further evaluation of these materials as cathodes in real MEC.
Chronoamperometry
Linear sweep voltammetry
Microbial electrolysis cell
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In the present study, carbon nanotube supported Pt (Pt/CNT), Bi (Bi/CNT), and Ru (Ru/CNT) catalysts are prepared via NaBH4 reduction method for ethanol (C2H5OH), ethylene glycol (C2H6O2), and methanol (CH3OH) electrooxidation. The physical characterization of these as-prepared catalysts is performed by X-ray diffraction (XRD). Furthermore, electrochemical measurements are conducted via cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), chronoamperometry (CA), and linear sweep voltammetry (LSV). Pt/CNT catalyst exhibits the highest catalytic activity and stability compared to Bi (Bi/CNT) and Ru (Ru/CNT) catalysts. It is observed that the electrocatalytic activity of Pt/CNT catalyst for ethylene glycol (C2H6O2) oxidation is higher than its electrocatalytic activities for ethanol (C2H5OH) and methanol (CH3OH) oxidation. Maximum current density of C2H6O2 of Pt/CNT catalyst is about 4 and 5.7 times lower than C2H5OH and CH3OH. Furthermore, electrochemical impedance spectroscopy (EIS), chronoamperometry (CA), and linear sweep voltammetry (LSV) results are in good agreement with CV results in terms of stability and electrocatalytic activity of Pt/CNT. The Pt/CNT catalyst is believed to be a promising anode catalyst for the alcohol fuel cells.
Chronoamperometry
Linear sweep voltammetry
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Chronoamperometry
Linear sweep voltammetry
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