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A Direct Alcohol Fuel Cell Driven by an Outer Sphere Positive Electrode
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-07-17 00:00:00 , DOI: 10.1021/acs.jpclett.7b01418 Zahid Manzoor Bhat 1 , Ravikumar Thimmappa 1 , Mruthunjayachari Chattanahalli Devendrachari 1 , Shahid Pottachola Shafi 1 , Shambulinga Aralekallu 1 , Alagar Raja Kottaichamy 1 , Manu Gautam 1 , Musthafa Ottakam Thotiyl 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-07-17 00:00:00 , DOI: 10.1021/acs.jpclett.7b01418 Zahid Manzoor Bhat 1 , Ravikumar Thimmappa 1 , Mruthunjayachari Chattanahalli Devendrachari 1 , Shahid Pottachola Shafi 1 , Shambulinga Aralekallu 1 , Alagar Raja Kottaichamy 1 , Manu Gautam 1 , Musthafa Ottakam Thotiyl 1
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Molecular oxygen, the conventional electron acceptor in fuel cells poses challenges specific to direct alcohol fuel cells (DAFCs). Due to the coupling of alcohol dehydrogenation with the scission of oxygen on the positive electrode during the alcohol crossover, the benchmark Pt-based air cathode experiences severe competition and depolarization losses. The necessity of heavy precious metal loading with domains for alcohol tolerance in the state of the art DAFC cathode is a direct consequence of this. Although efforts are dedicated to selectively cleave oxygen, the root of the problem being the inner sphere nature of either half-cell chemistry is often overlooked. Using an outer sphere electron acceptor that does not form a bond with the cathode during redox energy transformation, we effectively decoupled the interfacial chemistry from parasitic chemistry leading to a DAFC driven by alcohol passive carbon nanoparticles, with performance metrics ∼8 times higher than Pt-based DAFC-O2.
中文翻译：
外球面正电极驱动的直接酒精燃料电池
分子氧，燃料电池中的常规电子受体，提出了直接酒精燃料电池（DAFC）特有的挑战。由于在酒精穿越过程中酒精脱氢与氧气在正极上的割裂相结合，基准的基于Pt的空气阴极经历了严重的竞争和去极化损失。在现有技术的DAFC阴极中，需要重载贵重金属并具有耐醇性的区域是这的直接结果。尽管人们致力于选择性地裂解氧，但问题的根源是两种半电池化学结构的内球性质经常被忽略。使用在氧化还原能量转换过程中不与阴极形成键的外层电子受体，2。
更新日期：2017-07-19
中文翻译：
外球面正电极驱动的直接酒精燃料电池
分子氧，燃料电池中的常规电子受体，提出了直接酒精燃料电池（DAFC）特有的挑战。由于在酒精穿越过程中酒精脱氢与氧气在正极上的割裂相结合，基准的基于Pt的空气阴极经历了严重的竞争和去极化损失。在现有技术的DAFC阴极中，需要重载贵重金属并具有耐醇性的区域是这的直接结果。尽管人们致力于选择性地裂解氧，但问题的根源是两种半电池化学结构的内球性质经常被忽略。使用在氧化还原能量转换过程中不与阴极形成键的外层电子受体，2。
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