双功能
过电位
塔菲尔方程
析氧
材料科学
介孔材料
碳纤维
纳米技术
化学工程
化学
电化学
催化作用
复合数
复合材料
电极
有机化学
物理化学
工程类
作者
Xiaoli Luo,Zhen Liu,Yaping Ma,Yanxia Nan,Yu Gu,Shun‐Li Li,Qiulan Zhou,Junming Mo
标识
DOI:10.1016/j.jallcom.2021.161464
摘要
• A high-performance ORR/OER catalyst is prepared by using corn stalks as precursor. • FeN x and FeC x originated from Fe, N-dual doped improve catalytic performance. • The Fe-MNC catalyst achieves an excellent performance for Zn-air batteries. The development of affordable and perdurable electrocatalysts for oxygen reduction/evolution reaction (ORR/OER) has been considered as an alternative to address the global energy crisis and grievous environmental pollution. Therefore, exhaustively developing low-cost bifunctional electrocatalysts is of significance especially derived from the ubiquitous carbonous biomass materials. Here, an advanced catalyst of Fe, N-dual doped mesoporous and microporous carbon nanosheets (Fe-MNC) is synthesized by using Fe-pyridine coordination complex as the sources of Fe, N and corn stalk soot as the support. The Fe-MNC possesses vigorous electrocatalytic performance for ORR with an E 1/2 of 0.85 V. Moreover, for OER, the overpotential is as low as 309 mV at the current density ( j ) of 10 mA cm −2 and the Tafel slope is 127 mV dec −1 . What's more, a rechargeable Zn-Air battery is constructed based on Fe-MNC as the air cathode. This work not only establishes an easy access and sustainable way to produce a cost-cutting and highly efficient ORR/OER catalyst, but also paves a new way for a greater value-added utilization of biomass carbon for sustainable energy conversation.
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