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Full-Text Articles in Physical Sciences and Mathematics
Deactivation Of Nickel Oxide/Hydroxide To Electrooxidation Of H 2po - 2 Anions On Nickel Electrodes In Alkaline Solutions, Taixiang Jiang, Huihuang Wu
Deactivation Of Nickel Oxide/Hydroxide To Electrooxidation Of H 2po - 2 Anions On Nickel Electrodes In Alkaline Solutions, Taixiang Jiang, Huihuang Wu
Journal of Electrochemistry
Electrooxidation of hypophosphite anions on polycrystalline nickel in alkaline solutions has been investigated by cyclic voltammetry and open circuit potential measurements.The results are explained based on the mechanism that the first step of hypophosphite oxidation is the adsorption of hypophosphite ions on nickel,followed by the homolysis of its hydrogen bond with the formation of radicals.The oxidation of hypophosphite on nickel in alkaline medium occurs at lower potentials between ca.-0.8 V—-1.1 V(SCE)and phosphite ion is the only oxidation product.There is no indication of hypophosphite oxidation at higher potentials.Severe deactivation of the surface occurs when the nickel surface is covered with surface …
The Influence Of Heat On The Measurement Of Photocurrent At The Anodic Film Of Nickel Electrode, Hang Chen, Zhiyu Jiang
The Influence Of Heat On The Measurement Of Photocurrent At The Anodic Film Of Nickel Electrode, Hang Chen, Zhiyu Jiang
Journal of Electrochemistry
The influence of heat on the measurement of photocurrent for nickel electrode in 1 mol/L NaOH solution was investigated by using the photocurrent,photothermal and thermal current methods. It was found that the appearance of photocurrent in potential region of -0.750.20 V(vs. Hg/HgO electrode) was due to the p_type semiconductor properties of Ni(OH)2 film in which is agree with the previous report. In the Ni(OH)2/NiOOH redox potential region, the increase of temperature at the surface of working electrode during irradiation significantly promoted the electrochemical reaction strongly. The photocurrent observed in potential region 0.200.57 V is mainly attributed to the influence of …