Porous carbon polyhedrons with exclusive Metal-NX moieties for efficient oxygen reduction reaction

被引：18
作者：
Chen, Wei-Chang [1 ]
Yang, Gang [1 ]
Zhao, Yue [1 ]
Yuan, Gao-Qing [1 ]
Ye, Jian-Shan [1 ]
Liu, Hai-Yang [1 ]
Xiao, Xin-Yan [1 ]
机构：
[1] South China Univ Technol, Sch Chem & Chem Engn, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2021年 / 46卷 / 80期
基金：
中国国家自然科学基金;
关键词：
N-doped porous carbon; polyhedrons; Metal-NX; Oxygen reduction reaction; Porphyrin; HIGHLY-EFFICIENT; DOPED CARBON; DEFECT-RICH; ELECTROCATALYSTS; ORR; ALKALINE; CATALYST; COBALT; NANOSHEETS; GREEN;
D O I：
10.1016/j.ijhydene.2021.09.244
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
This work has manufactured a series of M-N-X/C (M = Fe, Cu, Ni) ORR catalysts by the pyrolysis of metal tetraphenylporphyrin (MTPP) adsorbed onto N-doped porous carbon polyhedrons (NPCP) derived from ZIF-8. The comprehensive characterization data shows that the prepared M-N-X/C catalysts have hierarchical porous structure with high specific surface area and abundant M-N-X moieties. All prepared M-N-X/C catalysts exhibit good ORR performance. The ORR half-wave potentials E-1/2 of Fe-N-X/C, Cu-N-X/C and Ni-N-X/C catalyst are 0.885, 0.801 and 0.755 V respectively. The rotating ring-disk electrode (RRDE) test reveals that the ORR of Fe-N-X/C is a four electron process. While a two and four electron mixing ORR process are observed for Cu-N-X/C and Ni-N-X/C. In an alkaline medium, E-1/2 of Fe-N-X/C is observed 44 mV higher than that of commercial Pt/C. Also, Fe-N-X/C catalyst has outstanding long-term durability and good methanol resistance. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：39882 / 39891
页数：10
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