Low temperature catalytic reactivity of nanodiamond in molecular hydrogen

被引：30

作者：

Ahmed, Ashek-I ^{[1
]}

Mandal, Soumen ^{[2
]}

Gines, Laia ^{[2
]}

Williams, Oliver A. ^{[2
]}

Cheng, Chia-Liang ^{[1
]}

机构：

[1] Natl Dong Hwa Univ, Dept Phys, Hualien 97401, Taiwan

[2] Cardiff Univ, Sch Phys & Astron, Cardiff CF10 3AX, S Glam, Wales

来源：

CARBON | 2016年 / 110卷

关键词：

DETONATION NANODIAMOND; FILAMENT TEMPERATURE; SURFACE MODIFICATION; VAPOR-DEPOSITION; THIN-FILM; DIAMOND; HOT; DISSOCIATION; FUNCTIONALIZATION; AGGREGATION;

D O I：

10.1016/j.carbon.2016.09.019

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this paper, the reaction dynamics of hydrogen termination of nanodiamond annealed at low temperature (500 degrees C) in molecular hydrogen atmosphere is reported. In-situ residual gas analysis of nano diamond particles (4-5 nm) during annealing/hydrogenation indicates C-3-radical desorption which incites a free radical reaction through the reduction of molecular hydrogen to atomic hydrogen. Consequently, as released atomic hydrogen facilitates C-H adsorption on the surface of nanodiamond which was confirmed using infrared spectroscopy. This explains how nanodiamond particles can play a key role in hydrogen (H-2) dissociation and be terminated by the hydrogen (H) at relatively low temperature. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：438 / 442

页数：5

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