Performance of a Fe-N-C catalyst for the oxygen reduction reaction in direct methanol fuel cell: Cathode formulation optimization and short-term durability
Performance of a Fe-N-C catalyst for the oxygen reduction reaction in direct methanol fuel cell: Cathode formulation optimization and short-term durability
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DOI：
10.1016/j.apcatb.2016.08.043
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发表时间：
2017-02
影响因子：
22.1
通讯作者：
Luigi Osmieri;R. Escudero-Cid;Alessandro H. A. Monteverde Videla;P. Ocón;S. Specchia
中科院分区：
文献类型：
--
作者：
Luigi Osmieri;R. Escudero-Cid;Alessandro H. A. Monteverde Videla;P. Ocón;S. Specchia
使用 Fe(II)-酞菁作为独特的 Fe、N 和 C 来源，以及 SBA-15 有序介孔二氧化硅作为模板剂，合成了用于氧还原反应 (ORR) 的非贵金属 (NNM) 催化剂，从而获得了具有极高比表面积和高微孔率（约 50%）的材料。通过FESEM、FTIR 和拉曼分析来研究催化剂的形貌和物理化学性质。在旋转盘电极（RDE）中测试了ORR活性和甲醇耐受性，并通过旋转环盘电极（RRDE）测试和RDE中的过氧化氢还原测试研究了完全4电子还原的选择性，显示出非常有希望的结果。因此，在确定有关催化剂负载和 Nafion® 含量的最佳电极配方后，在 DMFC 的阴极上对 Fe-N-C 催化剂进行了测试，结果显示在 90 °C 时的最大功率密度为 20 mW cm−2。在 DMFC 上进行了短期耐久性测试，以评估 Fe-N-C 和 Pt/C 催化剂的性能，结果表明非贵金属催化剂具有更好的性能。因此，Fe-N-C催化剂是替代Pt作为DMFC阴极催化材料的潜在良好候选者。还测试了 H2/O2PEMFC 的性能，显示 60 °C 时的功率密度为 105 mW cm−2。
A non-noble metal (NNM) catalyst for oxygen reduction reaction (ORR) was synthesized using Fe(II)-phthalocyanine as unique source of Fe, N, and C, and SBA-15 ordered mesoporous silica as templating agent, resulting in a material with an extremely high specific surface area and a high microporosity (around 50%). FESEM, FTIR and Raman analyses were performed to investigate the morphology and the physicochemical properties of the catalyst. The ORR activity and the methanol tolerance were tested in rotating disk electrode (RDE), and the selectivity towards a complete 4-electrons reduction was investigated by rotating ring disk electrode (RRDE) test and hydrogen peroxide reduction test in RDE, showing very promising results. Thus, the Fe-N-C catalyst was tested at the cathode of a DMFC after determination of the optimal electrode formulation regarding catalyst loading and Nafion®content, showing a maximum power density of 20 mW cm−2at 90 °C. A short term durability test to assess the behavior of both the Fe-N-C and the Pt/C catalysts was conducted on the DMFC, showing a better performance of the non-noble catalyst. Thus, the Fe-N-C catalyst is a potential good candidate to be used as catalytic material for DMFC cathode, in alternative to Pt. The performance in a H2/O2PEMFC was tested as well, showing a power density of 105 mW cm−2at 60 °C.