Ultrathin Nitrogen-Doped Holey Carbon@Graphene Bifunctional Electrocatalyst for Oxygen Reduction and Evolution Reactions in Alkaline and Acidic Media

被引：333

作者：

Sun, Jiqing ^{[1
,2
,3
]}

Lowe, Sean E. ^{[2
]}

Zhang, Lijuan ^{[1
]}

Wang, Yazhou ^{[2
]}

Pang, Kanglei ^{[1
,3
]}

Wang, Yun ^{[2
]}

Zhong, Yulin ^{[2
]}

Liu, Porun ^{[2
]}

Zhao, Kun ^{[2
]}

Tang, Zhiyong ^{[1
]}

Zhao, Huijun ^{[2
,4
]}

机构：

[1] Natl Ctr Nanosci & Technol, CAS Key Lab Nanosyst & Hierarch Fabricat, CAS Ctr Excellence Nanosci, Beijing 100190, Peoples R China

[2] Griffith Univ, Ctr Clean Environm & Energy, Griffith, Qld 4222, Australia

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] Chinese Acad Sci, Ctr Environm & Energy Mat, CAS Ctr Excellence Nanosci, Inst Solid State Phys, Hefei 230031, Anhui, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2018年 / 57卷 / 50期

基金：

中国国家自然科学基金;

关键词：

alkaline and acidic; electrocatalysis; nitrogen-doped holey carbon; oxygen evolution reaction (OER); oxygen reduction reaction (ORR); METAL-FREE ELECTROCATALYST; RAMAN-SPECTROSCOPY; HIGHLY EFFICIENT; BLACK;

D O I：

10.1002/anie.201811573

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Efficient nonprecious-metal oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) electro-catalysts are key for the commercial viability of fuel cells, metal-air batteries, and water-splitting systems. Thus, high-performance ORR and OER electrocatalysts in acidic electrolytes are needed to support high-efficiency proton exchange membrane (PEM)-based systems. Herein, we report a new approach to design and prepare an ultrathin N-doped holey carbon layer (HCL) on a graphene sheet that exhibits outstanding bifunctional ORR/OER activities in both alkaline and acidic media. The edge sites of HCL are utilized to achieve selective doping of highly active pyridinic-N. The sandwiched graphene sheet provides mechanical support, stabilizes HCL structure and promotes charge transfer. The synergetic effect of the catalyst structure overcomes the drawbacks of holey graphene approaches. The resulting ORR and OER performances are equal to or better than the top-ranked electrocatalysts.

引用

页码：16511 / 16515

页数：5

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