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首页> 外文期刊>Electrochimica Acta >Novel carbon-supported Fe-N electrocatalysts synthesized through heat treatment of iron tripyridyl triazine complexes for the PEM fuel cell oxygen reduction reaction
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Novel carbon-supported Fe-N electrocatalysts synthesized through heat treatment of iron tripyridyl triazine complexes for the PEM fuel cell oxygen reduction reaction

机译：通过热处理三吡啶基三嗪铁配合物而合成的新型碳载Fe-N电催化剂，用于PEM燃料电池的氧还原反应

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摘要

2,4,6-Tris(2-pyridyl)-1,3,5-triazine (TPTZ) was used as a ligand to prepare iron-TPTZ (Fe-TPTZ) complexes for the development of a new oxygen reduction reaction (ORR) catalyst. The prepared Fe-TPTZ complexes were then heat-treated at temperatures ranging from 400℃ to 1100℃ to obtain carbon-supported Fe-N catalysts (Fe-N/C). These catalysts were characterized in terms of catalyst composition, structure, and morphology by several instrumental methods such as energy dispersive X-ray, X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. With respect to the ORR activity, the Fe-N/C catalysts were also evaluated by cyclic voltammetry, as well as rotating disk and ring-disk electrodes. The results showed that among the heat-treated catalysts, that obtained at a heat-treatment temperature of 800℃ is the most active ORR catalyst. The overall electron transfer number for the catalyzed ORR was determined to be between 3.5 and 3.8, with 10-30% H{sub}2O{sub}2 production. The ORR catalytic activity of this catalyst was also tested in a hydrogen-air proton exchange membrane (PEM) fuel cell. At a cell voltage of 0.30 V, this fuel cell can give a current density of 0.23 A cm{sup}(-2) with a maximum MEA power density of 0.070 Wcm{sup}(-2) indicating that this catalyst has potential to be used as a non-noble catalyst in PEM fuel cells.
机译：2,4,6-三（2-吡啶基）-1,3,5-三嗪（TPTZ）被用作配体来制备铁-TPTZ（Fe-TPTZ）配合物，用于开发新的氧还原反应（ORR） ）催化剂。然后将制备的Fe-TPTZ配合物在400℃至1100℃的温度范围内进行热处理，得到碳载Fe-N催化剂（Fe-N / C）。这些催化剂通过几种仪器方法，如能量色散X射线，X射线衍射，透射电子显微镜和X射线光电子能谱，在催化剂组成，结构和形态方面进行了表征。关于ORR活性，还通过循环伏安法，旋转盘电极和环形盘电极对Fe-N / C催化剂进行了评估。结果表明，在热处理的催化剂中，以800℃的热处理温度得到的催化剂是活性最高的ORR催化剂。确定催化的ORR的总电子转移数在3.5至3.8之间，产生10-30％的H {sub} 2O {sub} 2。还在氢气-空气质子交换膜（PEM）燃料电池中测试了该催化剂的ORR催化活性。在电池电压为0.30 V的情况下，该燃料电池的电流密度为0.23 A cm {sup}（-2），最大MEA功率密度为0.070 Wcm {sup}（-2），表明该催化剂具有在PEM燃料电池中用作非贵重催化剂。

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