Iron-nitrogen doped carbon with exclusive presence of FexN active sites as an efficient ORR electrocatalyst for Zn-air battery

被引：111

作者：

Hu, Xiao ^{[1
]}

Min, Yuan ^{[1
]}

Ma, Lin-Lin ^{[1
]}

Lu, Jia-Yuan ^{[1
]}

Li, Hong-Chao ^{[1
]}

Liu, Wu-Jun ^{[1
]}

Chen, Jie-Jie ^{[1
]}

Yu, Han-Qing ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Appl Chem, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Peoples R China

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 268卷

基金：

中国国家自然科学基金;

关键词：

Metal-organic framework (MOF); FexN nanocrystals; N-doped carbon; Oxygen reduction reaction; Zn-air batteries; OXYGEN REDUCTION REACTION; METAL-ORGANIC FRAMEWORKS; N-C CATALYSTS; GENERALIZED GRADIENT APPROXIMATION; DENSITY-FUNCTIONAL THEORY; CARBIDE-DERIVED CARBON; X-RAY-DIFFRACTION; FE/N/C-CATALYSTS; MOSSBAUER-SPECTROSCOPY; SYNERGISTIC CATALYST;

D O I：

10.1016/j.apcatb.2019.118405

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：

In this work, we have found that a new Fe-N module, FexN (x = 2, 3, or 4), in which the N atoms insert the lattice of Fe matrix, also has high catalytic activity towards ORR. We synthesized the FexN module embedded N-doped carbon material (FexN/NC) via a facile metal-organic framework (MOF)-templated approach. The as-synthesized FexN/NC shows a superb catalytic ORR activity as well as high methanol tolerance. The highly efficient catalytic active sites (FexN module and well-doped N species) were mainly responsible for the superb ORR activity. The synergistic mechanisms of the N-doped carbon support and FexN moieties for ORR at molecular level were elucidated by density functional theory calculations. The excellent catalytic ORR performance make the FexN/ NC catalyst be a promising candidate to replace the expensive Pt based cathodic catalyst in Zn-air batteries.

引用

页数：11

共 59 条

[1] Modal mineralogy of carbonaceous chondrites by X-ray diffraction and Mossbauer spectroscopy [J].