Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

New Insights on the Spatial Distribution of Metallic Phases in a Pb-Based Electrocatalyst

Full text
Author(s):
Teixeira-Neto, Erico [1] ; Buzzo, Guilherme S. [1] ; Suffredini, Hugo B. [1]
Total Authors: 3
Affiliation:
[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Santo Andre, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Journal of Physical Chemistry C; v. 114, n. 20, p. 9227-9233, MAY 27 2010.
Web of Science Citations: 4
Abstract

The morphology of a Pt-PbO(x)/C electrocatalyst is described in detail in this work. Transmission electron microscopy (TEM) imaging showed that this material is composed of metallic nanoparticles heterogeneously distributed on a carbon support. The observed nanoparticles are separate Pt and PbO(x) domains, as determined by X-ray diffraction (XRD), X-ray energy dispersive spectroscopy (XEDS-TEM), and XED-Spectrum Imaging. We determined the presence of very small PbO(x) nanoparticles, not detectable by conventional TEM, closely interacting with the Pt crystallites and homogeneously distributed on the carbon support. The observed morphological distribution of metallic phases may add new factors for the understanding of the superior performance of the Pt-PbO(x)/C catalyst in the oxidation of small organic molecules, as compared to the Pt/C catalyst. (AU)

FAPESP's process: 07/05155-1 - Preparation and use of heterogeneous catalysts by the sol-gel method for electrocatalysis and biodiesel synthesis
Grantee:Hugo Barbosa Suffredini
Support Opportunities: Research Grants - Young Investigators Grants