教師資料查詢 | 類別: 期刊論文 | 教師: 張裕祺 CHANG, YU-CHI (瀏覽個人網頁)

標題:A kinetic model for the anodic dissolution of zinc in alkaline electrolyte with sodium metasilicate additions
學年84
學期1
出版(發表)日期1996/01/01
作品名稱A kinetic model for the anodic dissolution of zinc in alkaline electrolyte with sodium metasilicate additions
作品名稱(其他語言)
著者張裕祺; Chang, Yu-chi
單位淡江大學化學工程與材料工程學系
出版者Elsevier
著錄名稱、卷期、頁數Electrochimica Acta 41(15), pp.2425-2432
摘要The anodic dissolution of zinc electrodes in potassium hydroxide solutions containing sodium metasilicate has been investigated experimentally and theoretically in this study. On the basis of the experimental r̀esults, a kinetic model based on a competitive chemisorption approach has been developed and tested. The steady-state dissolution of zinc electrodes in the above-mentioned system has been measured using rotating disc electrode techniques. Good agreement is obtained between the model and the experimental results. The activation energy for the system is close to that for a kinetically controlled mode. This suggests that a surface reaction is rate limiting during the electro-dissolution process. It has been shown that the increase in the Tafel slope for the above-mentioned system in the active dissolution region is due to the adsorption of silicate on the electrode surface. A modified Langmuir model has been found to work reasonably well for the system studied. A change in the reaction order with respect to hydroxide ion has been found experimentally and predicted by the model also.
關鍵字zinc;anodic dissolution;silicate;kinetic model
語言英文
ISSN0013-4686
期刊性質國外
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國別英國
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