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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

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

Revista

Título: Materials Letters

Vol. 66

Páginas: 64-67

ISSN: 0167-577X

Editora: Elsevier

Indexação

ISI Web of Knowledge - 5 Citações

ISI Web of Science

Scopus - 4 Citações

Classificação Científica

FOS: Ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4