N-Doped Carbon Electrocatalyst: Marked ORR Activity in Acidic Media without the Contribution from Metal Sites?

被引：155

作者：

Kong, Fantao ^{[1
]}

Cui, Xiangzhi ^{[1
,2
,3
]}

Huang, Yifan ^{[4
]}

Yao, Heliang ^{[1
]}

Chen, Yafeng ^{[5
]}

Tian, Han ^{[1
]}

Meng, Ge ^{[1
,2
]}

Chen, Chang ^{[1
,2
]}

Chang, Ziwei ^{[6
]}

Shi, Jianlin ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

[3] Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Sch Chem & Mat Sci, Hangzhou 310021, Peoples R China

[4] Shanghai Normal Univ, Coll Chem & Mat Sci, Shanghai 200234, Peoples R China

[5] Univ Sci & Technol Beijing, Collaborat Innovat Ctr Steel Technol, Beijing 100083, Peoples R China

[6] Shanghai Tech Univ, Sch Phys Sci & Technol, Shanghai 201210, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2022年 / 61卷 / 15期

基金：

中国国家自然科学基金; 上海市自然科学基金;

关键词：

Heterostructures; Intermolecular Electron Transfer; Nanocages; Oxygen Reduction Reaction; Synergistic Effects; OXYGEN REDUCTION; ORGANIC FRAMEWORK; IRON; NANOPARTICLES; CATALYSTS; ALKALINE; HYDROGEN; DEFECTS;

D O I：

10.1002/anie.202116290

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Fe-N-C electrocatalysts have been demonstrated to be the most promising substitutes for benchmark Pt/C catalysts for the oxygen reduction reaction (ORR). Herein, we report that N-doped carbon materials with trace amounts of iron (0-0.08 wt. %) show excellent ORR activity and durability comparable and even superior to those of Pt/C in both alkaline and acidic media without significant contribution by the metal sites. Such an N-doped carbon (denoted as N-HPCs) features a hollow and hierarchically porous architecture, and more importantly, a noncovalently bonded N-deficient/N-rich heterostructure providing the active sites for oxygen adsorption and activation owing to the efficient electron transfer between the layers. The primary Zn-air battery using N-HPCs as the cathode delivers a much higher power density of 158 mW cm(-2), and the maximum power density in the H-2-O-2 fuel cell reaches 486 mW cm(-2), which is comparable to and even better than those using conventional Fe-N-C catalysts at cathodes.

引用

页数：11

共 63 条

[1] Tuning the Intermolecular Electron Transfer of Low-Dimensional and Metal-Free BCN/C60 Electrocatalysts via Interfacial Defects for Efficient Hydrogen and Oxygen Electrochemistry [J].