Atomically Dispersed Fe-Heteroatom (N, S) Bridge Sites Anchored on Carbon Nanosheets for Promoting Oxygen Reduction Reaction

被引：231

作者：

Wang, Mengran ^{[1
]}

Yang, Wenjuan ^{[1
]}

Li, Xinzhe ^{[2
]}

Xu, Yangsen ^{[1
]}

Zheng, Lirong ^{[3
]}

Su, Chenliang ^{[1
]}

Liu, Bin ^{[4
]}

机构：

[1] Shenzhen Univ, Inst Microscale Optoeletron, Int Collaborat Lab 2D Mat Optoelect Sci & Technol, Minist Educ, Shenzhen 518060, Peoples R China

[2] Natl Univ Singapore, Dept Mat Sci & Engn, Singapore 117575, Singapore

[3] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing, Peoples R China

[4] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore

来源：

ACS ENERGY LETTERS | 2021年 / 6卷 / 02期

基金：

中国国家自然科学基金;

关键词：

HIERARCHICAL POROUS CARBON; FE-N-4; SITES; CATALYTIC SITES; ELECTROCATALYSTS; COORDINATION; SULFUR;

D O I：

10.1021/acsenergylett.0c02484

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：

Single Fe atom dispersed carbon nanostructures show promising oxygen reduction reaction (ORR) activities for renewable energy applications. Nevertheless, the microenvironment of the single Fe atoms needs to be further engineered to optimize the catalytic performance, which is challenging. In this work, we develop a NaCl-template pyrolysis method to fabricate single Fe atom catalysts with atomically dispersed Fe-heteroatom (N, S) bridge sites anchored on carbon nanosheets. The N and S coordinated Fe atomic sites (FeN3S) are found to induce charge redistribution, lowering the binding strength of oxygenated reaction intermediates and leading to fast reaction kinetics and good oxygen reduction activity. Our work provides an effective method to regulate the microenvironment of single-atom catalysts for optimizing electrocatalytic performance.

引用

页码：379 / 386

页数：8

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