PtRu/C Electrocatalysts Prepared Using Gamma and Electron Beam Irradiation for Methanol Electrooxidation

Autor(es)

Silva, Dionisio F. ; Geraldes, Adriana N. ; Pino, Eddy S. ; Oliveira Neto, Almir ; Linardi, Marcelo ; Spinace, Estevam V.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Nanomaterials; v. 2012, p. 6-pg., 2012-01-01.

Resumo

PtRu/C electrocatalysts (carbon-supported PtRu nanoparticles) were prepared in a single step submitting water/2-propanol mixtures containing Pt(IV) and Ru(III) ions and the carbon support to gamma and electron beam irradiation. The electrocatalysts were characterized by energy dispersive X-ray analysis (EDX), X-ray diffraction (XRD), transmission electron microscopy (TEM), and cyclic voltammetry and tested for methanol electrooxidation. PtRu/C electrocatalyst can be prepared in few minutes using high dose rate electron beam irradiation while using low dose rate gamma irradiation some hours were necessary to prepare it. The obtained materials showed the face-centered cubic (fcc) structure of Pt and Pt alloys with average nanoparticle sizes of around 3 nm. The material prepared using electron beam irradiation was more active for methanol electrooxidation than the material prepared using gamma irradiation. (AU)

• Processo FAPESP: 07/08724-7 - Preparação de eletrocatalisadores PtRu/C e PtSn/C utilizando feixe de elétrons para aplicação como ânodo na oxidação direta de álcoois em células a combustível.
• Beneficiário: Estevam Vitorio Spinacé
• Modalidade de apoio: Auxílio à Pesquisa - Regular