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

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Manuel Fernando R Pereira (Author) FEUP; Adrián M.T. Silva (Author) FEUP; José Luís Figueiredo (Author) FEUP; Raquel Rocha (Author) FEUP; Goran Drazic (Author) Other

Journal

Title: Materials Letters

Vol. 66

Pages: 64-67

ISSN: 0167-577X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 5 Citations

ISI Web of Science

Scopus - 4 Citations

Scientific classification

FOS: Engineering and technology

Other information

Authenticus ID: P-002-HEY

DOI: 10.1016/j.matlet.2011.08.078

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4