کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5008658 1462037 2018 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Research paperThe effect of the gas diffusion layer on the performance of fuel cell catalyst layers in ethanol sensors
ترجمه فارسی عنوان
اثر لایه انتشار دیافراگم بر عملکرد لایه کاتالیزور سلول سوختی در سنسورهای اتانولی
کلمات کلیدی
سنسور الکل تنفس، ایستگاه آزمایش اتانول، سنسورهای سلول سوختی، سلول سوخت مستقیم الکل، رطوبت نسبی،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


- Measured various MEAs in next-generation ethanol test station.
- GDL effects are dependent on both membrane and catalyst used.
- GDL has greater overall effect when platinum black is used as a catalyst.
- Removal of the GDL negatively effects Nafion based MEA stability.
- Removal of the GDL has little effect on PVC based MEA stability.

The influence of the gas diffusion layer (GDL) on sensing performance of two commercially available fuel cell catalysts and membranes were investigated in an ethanol sensor. The catalyst used was either platinum black (Pt) or 20% platinum on carbon (Pt/C). These catalysts were coated onto a carbon paper, carbon paper with a microporous layer and carbon cloth GDL. Nafion and porous polyvinyl chloride (PVC) containing sulfuric acid were used as membranes. A fourth sample set with no GDL present was also tested. It was found the GDL's effect on performance depended on the membrane electrode assembly (MEA) employed. For a Pt-Nafion MEA, the carbon cloth GDL showed the best performance compared to the other two GDLs and no GDL. The removal of the GDL significantly impacts the structural integrity of the catalyst layer, effecting performance. MEAs prepared with a carbon paper GDL were prone to localized flooding at higher humidity's. Pt/C-Nafion MEAs showed similar performance, regardless of GDL. Removal of the GDL with a Pt/C catalyst greatly affected the structural integrity of the MEA, decreasing performance. PVC membranes are more flexible in the choice of GDL and catalyst layer. Overall, the carbon paper-MPL-Pt/C-PVC showed the best performance due to having the greatest stability in performance at the two humidities tested.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 254, January 2018, Pages 120-132
نویسندگان
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