Facile, scalable synthesis of edge-halogenated graphene nanoplatelets as efficient metal-free eletrocatalysts for oxygen reduction reaction

被引：294

作者：

Jeon, In-Yup ^{[1
]}

Choi, Hyun-Jung ^{[1
]}

Choi, Min ^{[1
]}

Seo, Jeong-Min ^{[1
]}

Jung, Sun-Min ^{[1
]}

Kim, Min-Jung ^{[1
]}

Zhang, Sheng ^{[2
]}

Zhang, Lipeng ^{[3
]}

Xia, Zhenhai ^{[3
]}

Dai, Liming ^{[2
]}

Park, Noejung ^{[1
]}

Baek, Jong-Beom ^{[1
]}

机构：

[1] Ulsan Natl Inst Sci & Technol, Interdisciplinary Sch Green Energy, Low Dimens Carbon Mat Ctr, Ulsan 689798, South Korea

[2] Case Western Reserve Univ, Dept Macromol Sci & Engn, Cleveland, OH 44106 USA

[3] Univ N Texas, Dept Mat Sci & Engn, Denton, TX 76203 USA

来源：

SCIENTIFIC REPORTS | 2013年 / 3卷

基金：

新加坡国家研究基金会;

关键词：

CATALYST-FREE SYNTHESIS; FREE ELECTROCATALYSTS; CARBON NANOMATERIALS; DOPED GRAPHENE; OXIDE; GRAPHITE; NANOTUBES; NANOSHEETS; IRON;

D O I：

10.1038/srep01810

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

A series of edge-selectively halogenated (X = Cl, Br, I) graphene nanoplatelets (XGnPs = ClGnP, BrGnP, IGnP) were prepared simply by ball-milling graphite in the presence of Cl-2, Br-2 and I-2, respectively. High BET surface areas of 471, 579 and 662 m(2)/g were observed for ClGnP, BrGnP and IGnP, respectively, indicating a significant extent of delamination during the ball-milling and subsequent workup processes. The newly-developed XGnPs can be well dispersed in various solvents, and hence are solution processable. Furthermore, XGnPs showed remarkable electrocatalytic activities toward oxygen reduction reaction (ORR) with a high selectivity, good tolerance to methanol crossover/CO poisoning effects, and excellent long-term cycle stability. First-principle density-functional calculations revealed that halogenated graphene edges could provide decent adsorption sites for oxygen molecules, in a good agreement with the experimental observations.

引用

页数：7

共 47 条

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