The edge- and basal-plane-specific electrochemistry of a single-layer graphene sheet

被引：462

作者：

Yuan, Wenjing ^{[1
]}

Zhou, Yu ^{[2
]}

Li, Yingru ^{[1
]}

Li, Chun ^{[1
]}

Peng, Hailin ^{[2
]}

Zhang, Jin ^{[2
]}

Liu, Zhongfan ^{[2
]}

Dai, Liming ^{[3
]}

Shi, Gaoquan ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

[2] Peking Univ, Acad Adv Interdisciplinary Studies, Coll Chem & Mol Engn, Ctr Nanochem,Beijing Natl Lab Mol Sci,State Key, Beijing 100871, Peoples R China

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

来源：

SCIENTIFIC REPORTS | 2013年 / 3卷

基金：

美国国家科学基金会;

关键词：

CARBON NANOTUBES; ELECTRODES; GRAPHITE; ENDS; CVD; MICROELECTRODES; DIFFUSION; SITES; FILMS;

D O I：

10.1038/srep02248

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：

Graphene has a unique atom-thick two-dimensional structure and excellent properties, making it attractive for a variety of electrochemical applications, including electrosynthesis, electrochemical sensors or electrocatalysis, and energy conversion and storage. However, the electrochemistry of single-layer graphene has not yet been well understood, possibly due to the technical difficulties in handling individual graphene sheet. Here, we report the electrochemical behavior at single-layer graphene-based electrodes, comparing the basal plane of graphene to its edge. The graphene edge showed 4 orders of magnitude higher specific capacitance, much faster electron transfer rate and stronger electrocatalytic activity than those of graphene basal plane. A convergent diffusion effect was observed at the sub-nanometer thick graphene edge-electrode to accelerate the electrochemical reactions. Coupling with the high conductivity of a high-quality graphene basal plane, graphene edge is an ideal electrode for electrocatalysis and for the storage of capacitive charges.

引用

页数：7

共 43 条

[1] Nature of Graphene Edges: A Review [J].

Acik, Muge ;

Chabal, Yves J. .

JAPANESE JOURNAL OF APPLIED PHYSICS, 2011, 50 (07)

[2] Electrochemical Atomic Force Microscopy Using a Tip-Attached Redox Mediator for Topographic and Functional Imaging of Nanosystems [J].

Anne, Agnes ;

Cambril, Edmond ;

Chovin, Arnaud ;

Demaille, Christophe ;

Goyer, Cedric .

ACS NANO, 2009, 3 (10) :2927-2940

[3] Relaxation time of memorial diffusion by chronoamperometry at a twin-electrode [J].

Aoki, Koichi ;

Xiang, Chaoyao .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (42) :15433-15439

[4]

Aoki K, 2012, INT J ELECTROCHEM SC, V7, P5880

[5] Electrochemistry at the Edge of a Single Graphene Layer in a Nanopore [J].

Banerjee, Shouvik ;

Shim, Jiwook ;

Rivera, Jose ;

Jin, Xiaozhong ;

Estrada, David ;

Solovyeva, Vita ;

You, Xueqiu ;

Pak, James ;

Pop, Eric ;

Aluru, Narayana ;

Bashir, Rashid .

ACS NANO, 2013, 7 (01) :834-843

[6] New electrodes for old: from carbon nanotubes to edge plane pyrolytic graphite [J].

Banks, CE ;

Compton, RG .

ANALYST, 2006, 131 (01) :15-21

[7] Exploring the electrocatalytic sites of carbon nanotubes for NADH detection: an edge plane pyrolytic graphite electrode study [J].

Banks, CE ;

Compton, RG .

ANALYST, 2005, 130 (09) :1232-1239

[8] Electrocatalysis at graphite and carbon nanotube modified electrodes: edge-plane sites and tube ends are the reactive sites [J].

Banks, CE ;

Davies, TJ ;

Wildgoose, GG ;

Compton, RG .

CHEMICAL COMMUNICATIONS, 2005, (07) :829-841

[9] Graphene electrochemistry: fundamental concepts through to prominent applications [J].

Brownson, Dale A. C. ;

Kampouris, Dimitrios K. ;

Banks, Craig E. .

CHEMICAL SOCIETY REVIEWS, 2012, 41 (21) :6944-6976

[10] CVD graphene electrochemistry: biologically relevant molecules [J].

Brownson, Dale A. C. ;

Gomez-Mingot, Maria ;

Banks, Craig E. .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2011, 13 (45) :20284-20288

← 1 2 3 4 5 →