材料科学
催化作用
碳纤维
无机化学
电化学
比表面积
结晶度
化学工程
电解质
介孔材料
卟啉
金属
化学
电极
有机化学
复合数
工程类
物理化学
复合材料
冶金
作者
Seul Lee,Da-Hee Kwak,Sang-Beom Han,Young-Woo Lee,Jin-Yeon Lee,In-Ae Choi,Hyun-Suk Park,Jin‐Young Park,Kyung-Won Park
标识
DOI:10.1021/acscatal.5b02721
摘要
Doped carbon nanomaterials as non-precious-metal catalysts for the oxygen reduction reaction (ORR) in polymer electrolyte membrane fuel cells have received intense attraction. The improvement of ORR performance for the doped porous carbon nanostructures with high specific surface areas is mainly attributed to multidoped electrochemical active sites provided by the metallic (Fe, Co) and nonmetallic species (N, B, and S). Here, we prepared porous iron/nitrogen-doped carbon nanostructured materials via a simple synthesis process using silicate beads (500 and 50 nm diameter) as templates in the presence of 5,10,15,20-tetrakis(4-methoxyphenyl)-21H,23H-porphyrin (TMPP) or (5,10,15,20-tetrakis(4-methoxyphenyl)-21H,23H-porphyrin)iron(III) chloride (FeTMPP). The resulting samples exhibited a bimodal porous structure, homogeneous heteroatomic doping, and a fairly large specific surface area. In particular, the sample prepared using both 500 and 50 nm silicate beads with FeTMPP (FeTMPP-C-500/50) exhibited much improved ORR performance in an acid solution. The enhanced ORR properties of FeTMPP-C-500/50 could result from the fairly large specific surface area, mixed macro-/mesoporous structure, high crystallinity, and codoping of metal and nitrogen.
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