Guangxi Key Laboratory of Information Material, Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
Molecules. 2023 Mar 5;28(5):2392. doi: 10.3390/molecules28052392.
Advancements in inexpensive, efficient, and durable oxygen reduction catalysts is important for maintaining the sustainable development of fuel cells. Although doping carbon materials with transition metals or heteroatomic doping is inexpensive and enhances the electrocatalytic performance of the catalyst, because the charge distribution on its surface is adjusted, the development of a simple method for the synthesis of doped carbon materials remains challenging. Here, a non-precious-metal tris (Fe/N/F)-doped particulate porous carbon material (2P-Fe-850) was synthesized by employing a one-step process, using 2-methylimidazole, polytetrafluoroethylene, and FeCl as raw materials. The synthesized catalyst exhibited a good oxygen reduction reaction performance with a half-wave potential of 0.85 V in an alkaline medium (compared with 0.84 V of commercial Pt/C). Moreover, it had better stability and methanol resistance than Pt/C. This was mainly attributed to the effect of the tris (Fe/N/F)-doped carbon material on the morphology and chemical composition of the catalyst, thereby enhancing the catalyst's oxygen reduction reaction properties. This work provides a versatile method for the gentle and rapid synthesis of highly electronegative heteroatoms and transition metal co-doped carbon materials.
在维持燃料电池可持续发展方面，开发廉价、高效且耐用的氧还原催化剂非常重要。虽然用过渡金属掺杂碳材料或杂原子掺杂的方法既廉价又能提高催化剂的电催化性能，但由于其表面的电荷分布得到了调整，因此开发出一种简单的掺杂碳材料的合成方法仍然具有挑战性。在这里，采用一步法，使用 2-甲基咪唑、聚四氟乙烯和 FeCl 作为原料，合成了一种非贵金属三（Fe/N/F）掺杂颗粒多孔碳材料（2P-Fe-850）。所合成的催化剂在碱性介质中具有良好的氧还原反应性能，半波电位为 0.85 V（与商业 Pt/C 的 0.84 V 相比）。此外，它的稳定性和抗甲醇性能优于 Pt/C。这主要归因于三（Fe/N/F）掺杂碳材料对催化剂形貌和化学组成的影响，从而增强了催化剂的氧还原反应性能。这项工作为温和、快速合成高电负性杂原子和过渡金属共掺杂碳材料提供了一种通用方法。
