کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1271760 1497461 2015 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Three-phase interphase modeling of anode in membrane electrode assembly using a porous microelectrode
ترجمه فارسی عنوان
مدل سازی بین فاز سه فاز از آند در مونتاژ الکترود غشایی با استفاده از میکرو الکترودهای متخلخل
کلمات کلیدی
طیف سنجی امپدانس الکتروشیمیایی، واکنش اکسیداسیون هیدروژن، مونتاژ الکترودهای غشایی، میکرو الکترودهای متخلخل، رابط سه فاز
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
چکیده انگلیسی


• Non-degraded and degraded three-phase interfaces were modeled.
• Porous microelectrodes were employed as the models.
• The impedance behavior of hydrogen oxidation reaction was investigated.
• Charge transfer resistance was significantly higher on the degraded model.
• Mass transfer resistance was significantly higher on the degraded model.

In this study, the hydrogen oxidation reaction (HOR) at the modeled three-phase interfaces of before and after degradation was investigated by combining electrochemical impedance spectroscopy (EIS) and porous microelectrode (PME) techniques. The powder mixture of a carbon-supported Pt catalyst and Nafion-packed PME (Electrode-1) was modeled as a non-degraded three-phase interface. On the other hand, the powder mixture of carbon black and Nafion-packed Pt electroplated PME (Electrode-2) modeled as a degraded three-phase interface. Electrode-1 showed a higher HOR activity than Electrode-2. Based on the EIS result, when compared to Electrode-1, both the charge transfer and mass transfer resistances of Electrode-2 significantly increased, suggesting a suppression of the HOR activity on the three-phase interface of the degraded model. That is, the charge transfer and mass transfer are hindered on the degraded three-phase interface.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Hydrogen Energy - Volume 40, Issue 12, 6 April 2015, Pages 4349–4356
نویسندگان
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