The effect of Ce on the properties of nickel hydroxide electrode
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Effect of cerium element which was mixed with Ni(OH) 2 by incorporation and co precipitated as additive on properties of nickel electrode were studied. The experimental results were analyzed by means of cyclic voltammetry. The results show that nickel electrodes with incorporated directly display excellent charge discharge behaviour. by contrast nickel electrodes co precipitated with cerium can not effectively improved the properties. The results of cyclic voltammetry shows that the reversibility of nickel electrode with cerium incorporated is improved as well as the transportation ability of H +, thus the properties is better.Cite
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Alkaline battery
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The morphological characteristics and electrochemical behavior of nickel metal foil (Ni), nickel-polyvinyl chloride (Ni-PVC) and nickel-cobalt-polyvinyl chloride (Ni-Co-PVC) electrodes in alkaline solution has been investigated. The morphological characteristics of the electrode surface were studied using SEM and EDS, while the electrochemical behavior of the electrodes was studied using cyclic voltammetry (CV). It was found that composite electrodes (Ni-PVC and Ni-Co-PVC) have a porous, irregular and rough surface. In situ studies using electrochemical technique using those three electrodes exhibited electrochemical activity for redox system, as well as selectivity in the electrooxidation of ethanol to acetic acid. The studies also found that an electrokinetics and electrocatalytic activity behaviors of the electrodes prepared were Ni metal foil
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In this work, a nickel-modified glassy carbon electrode (GCE) was prepared using a potentiostatic method in 0.1 M acetate buffer solution at pH 4.0 containing 1.0 mM nickel nitrate. Nickel hydroxide nanoparticles were prepared using consecutive potential scanning in 0.1 M NaOH solution. The as-prepared catalyst was characterized by field emission scanning electron microscopy and electrochemical methods. Electrochemical characterization exhibited stable redox behaviour of the Ni(III)/Ni(II) couple. Cyclic voltammetric experiments showed that electrocatalytic oxidation of methanol can occur at the modified electrode, whereas it is not observed at a bare GCE. The effect of potential sweep rates and methanol concentration on its electrochemical behaviour was studied. The rate constant (k) for the chemical reaction between methanol and catalytic centres has been evaluated by chronoamperometry. In addition, long-term stability of the modified electrode was investigated by electrochemical methods.
Chronoamperometry
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Chronoamperometry
Carbon paste electrode
Palladium-hydrogen electrode
Reversible hydrogen electrode
Standard hydrogen electrode
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The manganese dioxide was electrodeposited on the nano-TiO2 film electrode from the solution of MnSO4 by using cyclic voltammetry technique.Results obtained from SEM,EDS and IR strongly demonstrated that MnO2 was immobilized on the nano-TiO2 film electrode uniformly.The results indicated that MnO2/TiO2 film electrode had satisfactory cyclic ability and its specific mass capacity amounts to 144.6 F/g,which was higher than the value obtained on the pure MnO2ITO modified electrode.
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Alkaline battery
Potassium hydroxide
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Chemically modified electrode
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The pasted foam-nickel electrodes were prepared with various amounts of the addition of cobalt metallic powder to nickel hydroxide powder. Constant current charge/discharge tests, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to characterize the electrochemical performances of the pasted nickel electrodes. Results show that in comparison with that of the nickel electrode without cobalt addition, the nickel electrodes with cobalt powder addition exhibit better performances in the specific discharge capacity, active material utilization, resistance to swelling with cycling and cycle stability. Meanwhile, the cobalt addition also lowers the discharge potential of the pasted nickel electrodes, so the amount of cobalt addition to the nickel electrodes should be controlled, and an appropriate amount of addition is 3%~5%(mass percentage). The superior electrochemical performances of the nickel electrodes with the cobalt addition can be attributed to the higher reaction activity and lower electrochemical impedance.
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A modified electrode was fabricated by means of electrodeposition nickel-nickel oxide and copper-cuprous oxide on a glassy carbon electrode in the solution of Ni2+ and Cu2+.It can catalyze the reduction of H2O2 at an applied potential of-0.3 V.The response current was linearly changed with the concentration of H2O2 in a range from 2.5×10-6 to 2.8×10-3 mol/L.The effects of assay conditions on performances of hydrogen peroxide sensor were studied.The preparation of the sensor is simple.The sensor was used for the determination of real samples containing hydrogen peroxide with satisfactory recovery and result.
Nickel oxide
Non-blocking I/O
Glassy carbon
Carbon fibers
Copper oxide
Electrochemical gas sensor
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