普鲁士蓝
催化作用
纳米颗粒
兴奋剂
电池(电)
材料科学
阴极
碳纤维
无机化学
化学
化学工程
电化学
电极
纳米技术
有机化学
复合材料
光电子学
功率(物理)
物理化学
工程类
物理
复合数
量子力学
作者
Linfang Cui,Mingxing Chen,Ge Huo,Xian‐Zhu Fu,Jing‐Li Luo
标识
DOI:10.1016/j.cej.2020.125158
摘要
Developing highly active and durable electrocatalysts with low-cost for the oxygen reduction reaction (ORR) is of paramount importance for promoting economical and high-performance Al-air batteries. Herein, nitrogen-doped carbon decorated with FeCo nanoparticles catalysts is prepared by a low-cost and facile approach employed Prussian blue analogue and dicyandiamide as precursors. The obtained catalyst exhibits remarkable ORR activity with an onset potential (0.981 V vs. RHE) and a high half-wave potential (0.848 V vs. RHE), as well as superior stability in alkaline conditions. The outstanding electrocatalytic performance of electrocatalysts might be resulted from the hierarchical porous structure and synergetic effect between FeCo alloy and N-doped graphitic carbon species. As a demonstration, the optimized catalysts are employed as the cathode catalysts in a Al-air battery, which shows remarkable discharge performance with higher open-circuit voltage of 1.67 V and large power density of 98.62 mW cm−2 which exceeding commercial Pt/C electrocatalysts (1.65 V, 90.81 mW cm−2), and exceptional cycle stability of 40 h (4 cycles). This work will provide a chance to explore scalable advanced catalysts in Al-air battery.
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