Understanding Ru/CNT interactions: A rational design of Ru nanocatalysts

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2014

Autores

B.F. Machado (Autor) Outra; Oubenali, M (Autor) Outra; Axet, MR (Autor) Outra; Nguyen, TT (Autor) Outra; Tunckol, M (Autor) Outra; Girleanu, M (Autor) Outra; Ersen, O (Autor) Outra; Gerber, IC (Autor) Outra; Serp, P (Autor) Outra

Ata de Conferência Internacional

Título: Technical Proceedings of the 2014 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2014

Páginas: 269-272

Nanotechnology 2014: Electronics, Manufacturing, Environment, Energy and Water - 2014 NSTI Nanotechnology Conference and Expo, NSTI-Nanotech 2014

Washington, DC, 15 June 2014 through 18 June 2014

Indexação

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-00M-PRY

Abstract (EN): A comprehensive experimental and theoretical study of the surface chemistry of multi-walled carbon nanotubes (CNTs) and its effect on the deposition of ruthenium nanoparticles is reported. It is shown that the oxidation of CNTs by nitric acid creates various oxygen surface functional groups (SFGs) on the CNT external surface which is a critical step for the metal grafting. In particular, it is demonstrated that carboxylic acid, carboxylic anhydride and lactone groups act as anchoring centers for the Ru precursor, presumably as surface acetato ligands. The stability of Ru nanoparticles, modeled by a Rul3 cluster, on different adsorption sites follows the order: Gr-DV-(COOH)2 > Gr-DV > Gr (where DV is a double vacancy and Gr the graphene surface). It is shown that, after a high-temperature treatment performed to remove the SFGs, the Ru/CNT material can react with oxygen from air via a surface reconstruction reaction, which reforms a stable Ru-acetato interface.

Idioma: Inglês

Tipo (Avaliação Docente): Científica