A kinetic model for the anodic dissolution of zinc in alkaline electrolyte with sodium metasilicate additions

doi:10.1016/0013-4686(96)00029-1

淡江大學機構典藏 > 工學院 > 化學工程與材料工程學系暨研究所 > 期刊論文 > Item 987654321/44429

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題名:	A kinetic model for the anodic dissolution of zinc in alkaline electrolyte with sodium metasilicate additions
作者:	張裕祺;Chang, Yu-chi
貢獻者:	淡江大學化學工程與材料工程學系
關鍵詞:	zinc;anodic dissolution;silicate;kinetic model
日期:	1996-01
上傳時間:	2010-03-09 10:20:46 (UTC+8)
出版者:	Elsevier
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.
關聯:	Electrochimica Acta 41(15), pp.2425-2432
DOI:	10.1016/0013-4686(96)00029-1
顯示於類別:	[化學工程與材料工程學系暨研究所] 期刊論文

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