文献类型：期刊文献

英文题名：Three-Dimensional Hierarchical Porous Fe, N-Doped Hollow Carbon Nanospheres as Stable Electrocatalyst for Efficient Oxygen Reduction Reaction in Both Acidic and Alkaline Electrolytes

作者：Sun, Wei-Li[1];Xu, Chao[1];Guo, Peng-Peng[1];Lu, Chen[1];Yang, Kun-Zu[1];Wei, Ping-Jie[1];Liu, Jin-Gang[1]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China

年份：2022

卷号：7

期号：22

外文期刊名：CHEMISTRYSELECT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000808115900001)】；

基金：This study was financially supported by the National Nature Science Foundation of China (No. 21271072, 21571062) and the Fundamental Research Funds for the Central Universities (No. 222201717003).

语种：英文

外文关键词：Carbon; electrocatalyst; iron; oxygen reduction reaction; pore structure control

摘要：3D hierarchical porous Fe, N-doped hollow carbon nano-spheres (Fe-N-C HPNCs) as efficient ORR electrocatalyst were obtained using melamine-formaldehyde resin (MF) nanospheres as thermal sacrificial hard template to optimize the pore structure and provide nitrogen source to the catalyst. The optimized Fe-N-C HPNCs catalyst exhibited excellent catalytic activity with onset (E-onset) and half-wave (E-1/2) potential (E-onset=1.07 V; E-1/2=0.90 V vs. RHE) superior to commercial Pt/C catalyst in 0.1 M KOH solution, and demonstrated excellent stability. When applied as cathode electro-catalyst in a Zn-air battery, it produced maximum power density (P-max) of 127 mW cm(-2), which is higher than that of commercial Pt/C (P-max=119 mW cm(-2)). It also showed good activity (E-onset=0.89 V; E-1/2=0.78 V) in 0.1 M HClO4 electrolyte with significantly enhanced stability (Delta E-1/2=-7 mV) relative to the Pt/C catalyst (Delta E-1/2=-27 mV).