کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10269471 | 459861 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical study of a hydrogen diffusion anode-membrane assembly for membrane electrolysis
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Electrochemical study of a hydrogen diffusion anode-membrane assembly for membrane electrolysis Electrochemical study of a hydrogen diffusion anode-membrane assembly for membrane electrolysis](/preview/png/10269471.png)
چکیده انگلیسی
The membrane electrode assembly (MEA) studied was constituted with a gas diffusion electrode (E-TEK) impregnated with Nafion® solution which was assembled with a Nafion® 117 cation exchange membrane under heat and pressure. The MEA was used as anode in a membrane electrolysis (ME) cell with the objective to regenerate HCl and NaOH from NaCl. Current efficiency for hydrogen oxidation was determined and its value is 100%, which indicates that the only reaction occurring at the anode is the oxidation of hydrogen. Current-potential curves, recorded in different conditions, showed a linear variation in the range 0-3000 A mâ2 when hydrochloric acid concentration is below 2 mol dmâ3. In this case, the overvoltage was shown to be mainly due to the ohmic drop in the membrane and in the layer where Nafion® impregnation was performed. MEA overvoltage necessary to reach 3000 A mâ2 current density was about 0.12 V. For high HCl concentration (6-8 mol dmâ3), the MEA overvoltage increased sharply with current density due to the adsorption of chloride anions on platinum catalyst.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 51, Issue 3, 20 October 2005, Pages 386-394
Journal: Electrochimica Acta - Volume 51, Issue 3, 20 October 2005, Pages 386-394
نویسندگان
Frédéric Faverjon, Mohammed Rakib, Gérard Durand,