高性能多孔Fe/N共掺杂碳纳米管电催化剂研究

开发高性能、低成本的氧还原催化剂是降低燃料电池成本的关键之一。过渡金属-氮-碳材料具有催化活性高、成本低、环境友好等优点，被认为具有广阔的应用前景。该文提出了一种简单的聚多巴胺改性碳纳米管的方法，在碳纳米管（CNTs）表面包覆聚多巴胺（PDA），通过高温裂解CNTs@PDA和FeCl₃复合物制备多孔CNTs@Fe/N/C电催化剂。用TEM、BET、Raman和XPS对制备的催化剂的形貌和组成进行了表征。电化学结果表明，CNTs@40% Fe/N/C催化剂的半波电位高达0.881 V，接近于商业化Pt/C催化剂。此外，CNTs@40% Fe/N/C催化剂亦具备优异的抗甲醇干扰性及稳定性，是一种有良好实际应用前景的燃料电池非贵金属氧还原电催化剂。

Porous Fe/N-doped Carbon Layers Wrapped CNTs Electrocatalysts for Superior Oxygen Reduction Reaction

Developing high performance, low-cost oxygen reduction electrocatalysts is the key to reduce the cost of fuel cells. The transition metal-nitrogen-carbon materials have been highlighted as promising candidates owing to their high catalytic activity, low cost and environmental friendliness. Herein, we report a facile polydopamine modification approach to prepare porous CNTs@Fe/N/C elecrtocatalysts via pyrolysis of the CNTs@PDA and FeCl₃ composites. The morphology and composition of these as-prepared catalysts were characterized by TEM, BET, Raman and XPS. The electrochemical results show that the half-wave potential of the CNTs@40% Fe/N/C catalyst is as high as 0.881 V, which is close to that of commercial Pt/C catalyst. Moreover, the CNTs@40% Fe/N/C also showed superior durability and resistance to the methanol crossover.