Identification of catalytic sites for oxygen reduction and oxygen evolution in N-doped graphene materials: Development of highly efficient metal-free bifunctional electrocatalyst

Yang, Hong Bin; Miao, Jianwei; Hung, Sung‐Fu; Chen, Jiazang; Tao, Hua Bing; Wang, Xizu; Zhang, Liping; Chen, Rong; Gao, Jiajian; Chen, Hao Ming; Dai, Liming; Liu, Bin

doi:10.1126/sciadv.1501122

articleScience AdvancesApr 1, 2016GOLD OA

Identification of catalytic sites for oxygen reduction and oxygen evolution in N-doped graphene materials: Development of highly efficient metal-free bifunctional electrocatalyst

HBHong Bin Yang JMJianwei Miao SHSung‐Fu Hung JCJiazang Chen HBHua Bing Tao

Nanyang Technological University · National Taiwan University · +2 more institutions

PubMed

Indexed incrossrefdoajpubmed

Abstract

Oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are critical to renewable energy conversion and storage technologies. Heteroatom-doped carbon nanomaterials have been reported to be efficient metal-free electrocatalysts for ORR in fuel cells for energy conversion, as well as ORR and OER in metal-air batteries for energy storage. We reported that metal-free three-dimensional (3D) graphene nanoribbon networks (N-GRW) doped with nitrogen exhibited superb bifunctional electrocatalytic activities for both ORR and OER, with an excellent stability in alkaline electrolytes (for example, KOH). For the first time, it was experimentally demonstrated that the electron-donating quaternary N sites were…

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1,319

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Topics & keywords

Topics

Keywords

Bifunctional
Electrocatalyst
Graphene
Oxygen reduction
Catalysis
Doping
Materials science
Oxygen reduction reaction

UN Sustainable Development Goals

Affordable and clean energy

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