Surface modification and electrochemical behaviour of undoped nanodiamonds

被引：24

作者：

Zang, Jianbing ^{[1
,2
]}

Wang, Yanhui ^{[1
]}

Bian, Linyan ^{[1
]}

Zhang, Jinhui ^{[1
]}

Meng, Fanwei ^{[1
]}

Zhao, Yuling ^{[1
]}

Ren, Shubin ^{[2
]}

Qu, Xuanhui ^{[2
]}

机构：

[1] Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Coll Mat Sci & Engn, Qinhuangdao 066004, Peoples R China

[2] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2012年 / 72卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

Nanodiamond; Annealing; Surface modification; Electrochemical activity; DOPED DIAMOND ELECTRODES; THIN-FILM ELECTRODES; NANOCRYSTALLINE DIAMOND; DETONATION NANODIAMOND; CHARGE-TRANSFER; NANOPARTICLES; CONDUCTIVITY; REACTIVITY; SPECTROSCOPY; OXIDATION;

D O I：

10.1016/j.electacta.2012.03.169

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Surface modifications of undoped nanodiamond (ND) particles were carried out through different annealing treatments. The methods of Fourier transform infrared spectroscopy, Raman spectroscopy, and transmission electron microscopy were used to characterize the ND surface before and after the annealing process. The electrochemical properties of the modified ND powders in aqueous solution were investigated with Fe(CN)(6)(3-/4-) as a redox probe. When the annealing temperature was below 850 degrees C, vacuum annealing removed parts of the oxygen-containing surface functionalities from the ND surface and produced more sp(2) carbon atoms in the shell. The charge transfer of the Fe(CN)(6)(3-/4-) redox couple decreased with increasing annealing temperature. Re-annealing in air restored the original surface conditions: few sp(2)-bonded carbon atoms and similar surface functionalities, and thus the electrochemical activity. When ND was annealed in vacuum at 900-1100 degrees C, more serious graphitization produced a continuous fullerenic shell wrapped around a diamond core, which had a high conductivity and electrochemical activity. This provides a novel nanoparticle with high conductivity and high stability for electrochemical applications. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：68 / 73

页数：6

共 34 条

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