Development of new alcohol tolerant Pd-alloys cathodes for direct alcohol PEM fuel cells

我们打算开发一种新型的膜电极组件（MEA），用于直接乙醇的分析（甲醇和乙醇）燃料电池（DAFC）首次基于两个新概念或方向：i）基于负载在碳粉上的Pd合金催化剂的高耐受性醇阴极; ii）第二阶段这些催化剂的MEA将由催化电极制备，所述催化电极通过在气体扩散上直接沉积负载型催化剂而制造在与催化剂制备相同的炉中进行分层。这是首次在催化剂制备过程中将负载型催化剂直接沉积在气体扩散层上。这种燃料电池将用于移动的、运输或住宅）应用。该项目具有高度原创性和新颖性，因为它是第一次：i）直接醇（甲醇和乙醇）燃料电池将使用基于负载在碳上的Pd合金催化剂的高耐受性醇阴极进行开发; ii）这些催化剂的MEA将使用催化电极进行制备，该催化电极通过将负载的催化剂直接沉积在碳布或纸上而制成，与催化剂制备在同一炉中。该项目成功的关键在于找到制造MEA的方法，该MEA基于优化的碳支撑Pd合金阴极和Nafion® 117，以有效地用于DAFC的结构。因此，我们的战略是在竖式炉中开发碳载体上的Pd-Co、Pd-Ni、Pd-Cr和Pd-Fe阴极和Pt-Ru阳极催化剂将通过考虑单个DEFC硬件中其性能的以下参数来进行催化剂制备及其沉积的优化，以获得6.25cm 2的MEA的催化电极：i）开路电压为1.0伏（与当前技术的平均0.6伏相比）; ii）通过以下方式提高单电池工作电势：（至少）200 mV，与相同电流密度的当前技术相比; iii）分析MEA性能的结果并评估在标准单电池上获得的经典最新结果的进展。

We intend to develop new class of Membrane Electrode Assembly (MEA) for direct alcohol (methanol and ethanol) fuel cells (DAFC) based for the first time on two new concepts or directions: i) high tolerant alcohol cathodes based on Pd-alloy catalysts supported on carbon powder; ii) MEA of these catalysts which will be prepared from catalyzed electrode fabricated from direct deposition of the supported catalysts on the gas diffusion layer in the same furnace as the catalyst preparation. This is the first time that supported catalyst can be deposited directly on gas diffusion layer during the catalyst fabrication. Such fuel cells would be used for mobile, transportation or residential) applications. This project is highly original and novel because it is the first time that: i) direct alcohol (methanol and ethanol) fuel cell will be developed using high tolerant alcoholcathodes based on Pd-alloy catalysts supported on carbon; ii) MEA of these catalysts will be prepared using catalyzed electrodes fabricated from direct deposition of the supported catalysts on the carbon cloth or paper in the same furnace as the catalyst preparation. The keys to the success of this project will lie in finding ways of the fabrication of MEA based of optimised carbon supported Pd-alloys cathodes and Nafion® 117 to be effective for the structure of DAFC. Our strategies therefore, are to develop Pd-Co, Pd-Ni, Pd-Cr and Pd-Fe cathode and Pt-Ru anode catalysts on carbon support in a vertical furnace (homemade in our laboratory).The optimisation of the catalyst preparations and their deposition to get catalyzed electrodes for MEA of 6.25 cm2 will be done by considering the following parameters of its performance in a single DEFC hardware: i) open circuit voltage of 1.0 Volt (in comparison of an average of 0.6 Volt with the current technology); ii) improvethe single cell operating potential by (at least) 200 mV in comparison to those of the current technology for the same current density;iii) Analysis of the results on MEA performances and assessment of progress towards classical state-of-the-art results obtained on a standard single cell.