Supported Pt-particles on multi-walled carbon nanotubes with controlled surface chemistry

被引：6

作者：

Rocha, Raquel P. ^{[1
]}

Silva, Adrian M. T. ^{[1
]}

Drazic, Goran ^{[2
]}

Pereira, Manuel F. R. ^{[1
]}

Figueiredo, Jose L. ^{[1
]}

机构：

[1] Univ Porto, Fac Engn, Dept Engn Quim, Lab Associado LSRE,LCM, P-4200465 Oporto, Portugal

[2] Jozef Stefan Inst, Dept Nanostruct Mat, SI-1000 Ljubljana, Slovenia

来源：

MATERIALS LETTERS | 2012年 / 66卷 / 01期

关键词：

Multi-walled carbon nanotubes (MWCNTs); Surface chemistry; Platinum particle size; OXYGEN FUNCTIONALITIES; CATALYSTS; PLATINUM; OXIDATION;

D O I：

10.1016/j.matlet.2011.08.078

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Multi-walled carbon nanotubes (MWCNTs) were functionalized by HNO(3) hydrothermal oxidation at 200 degrees C. The degree of surface functionalization was described by an exponential function in terms of HNO(3) concentration. Very small Pt particles, with mean particle size of 1.7 +/- 0.3 nm, could be supported on the surface of pristine MWCNTs and also on MWCNTs treated with HNO(3) concentrations up to 0.20 mol L(-1), while a broader range of particle sizes, and larger Pt particles (3.4 +/- 1.3 nm) were obtained on the MWCNTs treated with a higher HNO(3) concentration (0.30 mol L(-1)). Therefore, the amounts of surface groups and Pt particle sizes can be selected by tuning the HNO(3) concentration used in the hydrothermal treatment. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：64 / 67

页数：4

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