Showing papers by "Edson A. Ticianelli published in 2009"
TL;DR: In this paper, the catalytic activity of Ni/CeO 2 -Al 2 O 3 catalysts modified with noble metals (Pt, Ir, Pd and Ru) was investigated for the steam reform of ethanol and glycerol.
175 citations
TL;DR: In this article, the operational characteristics of the Nafion® 212 membrane (N212) were investigated and compared to that of Naphion® 112 (N112), in proton exchange membrane fuel cells (PEMFCs).
116 citations
TL;DR: In this article, the electrocatalysis of CO tolerance of Pt/C, PtRu/C and PtMo/C at a PEM fuel cell anode has been investigated using single cell polarization and online electrochemical mass spectrometry (EMS) measurements, and cyclic voltammetry, X-ray diffraction (XRD), in situ Xray absorption near edge structure (XANES) analyses.
109 citations
TL;DR: In this article, the performance of noble metal (Pt, Ru, Ir)-promoted Co/MgAl 2 O 4 catalysts for the steam reforming of ethanol was investigated.
Abstract: The performance of noble metal (Pt, Ru, Ir)-promoted Co/MgAl 2 O 4 catalysts for the steam reforming of ethanol was investigated. The catalysts were characterized by energy-dispersive X-ray spectroscopy, X-ray diffraction, UV–vis diffuse reflectance spectroscopy, temperature-programmed reduction, temperature-programmed oxidation and X-ray absorption near edge structure (XANES). The results showed that the formation of inactive cobalt aluminate was suppressed by the presence of a MgAl 2 O 4 spinel phase. The effects of the noble metals included a marked lowering of the reduction temperatures of the cobalt surface species interacting with the support. It was seen that the addition of noble metal stabilized the Co sites in the reduced state throughout the reaction. Catalytic performance was enhanced in the promoted catalysts, particularly CoRu/MgAl 2 O 4 , which showed the highest selectivity for H 2 production.
57 citations
TL;DR: In this article, the authors studied the effect of heat treatment on the kinetics of the ORR in carbon-dispersed platinum and platinum-vanadium alloys in acid medium.
44 citations
TL;DR: In this paper, a carbon-supported Pt-Co nanoparticle electrocatalysts with low Pt content in alkaline electrolyte were investigated for the oxygen reduction reaction (ORR).
43 citations
TL;DR: In this article, Nitrate reduction on palladium multilayers deposited on platinum single crystal electrodes was studied by cyclic voltammetry and FTIR spectroscopy in acid and alkaline media.
40 citations
25 Sep 2009
TL;DR: In this article, a polymer electrolyte membrane fuel cell (PEMFC) was studied at different applied currents and fluxes in the anodic compartment, and the system consisted of a Pt/C cathode fed with oxygen and a PtRu(1:1)/C anode with H2 mixed with 108 ppm of CO, and was operated at 30 C.
Abstract: Oscillatory kinetics in a polymer electrolyte membrane fuel cell (PEMFC) was studied at different applied currents and fluxes in the anodic compartment. The system consisted of a Pt/C cathode fed with oxygen and a PtRu(1:1)/C anode fed with H2 mixed with 108 ppm of CO, and was operated at 30 C. Many different states including periodic and non-periodic series were observed as a function of the applied current (j) and the H2/CO flux. In general, aperiodic/chaotic states were favored at high currents and low flux. This allowed us to discuss the connection between the observed dynamics and the reaction mechanism.
8 citations