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Showing papers by "José Maria C. Bueno published in 2019"

Journal Article•DOI•
The role of Pt loading on La2O3-Al2O3 support for methane conversion reactions via partial oxidation and steam reforming

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Jesuína Cássia Santiago de Araújo1, Lais F. Oton2, Bruno dos Santos Bessa2, Antonio B.S. Neto2, Alcineia C. Oliveira2, Rossano Lang3, Larissa Otubo, José Maria C. Bueno4 •
Universidade Federal do Espírito Santo1, Federal University of Ceará2, Federal University of São Paulo3, Federal University of São Carlos4
15 Oct 2019-Fuel
TL;DR: In this article, the effects of Pt loadings on the catalytic performance of the La2O3-Al 2O3 supported Pt nanoparticles are investigated during the partial oxidation (POM) and steam reforming of methane (SRM).

31 citations

Journal Article•DOI•
On the role of size controlled Pt particles in nanostructured Pt-containing Al2O3 catalysts for partial oxidation of methane

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Jesuína Cássia Santiago de Araújo1, Lais F. Oton1, Lais F. Oton2, Alcineia C. Oliveira2, Rossano Lang3, Larissa Otubo, José Maria C. Bueno4 •
Universidade Federal do Espírito Santo1, Federal University of Ceará2, Federal University of São Paulo3, Federal University of São Carlos4
18 Oct 2019-International Journal of Hydrogen Energy
TL;DR: In this paper, the effect of the Pt loadings and particles sizes on the stability of Pt(x wt%)/Al2O3 catalysts were investigated in the partial oxidation of methane (POM) reaction.

21 citations

Journal Article•DOI•
Effect of Au doping of Ni/Al2O3 catalysts used in steam reforming of methane: Mechanism, apparent activation energy, and compensation effect

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Kleper de Oliveira Rocha1, C.M.P. Marques2, José Maria C. Bueno2•
Sao Paulo State University1, Federal University of São Carlos2
01 Jul 2019-Chemical Engineering Science
TL;DR: In this article, the effect of the addition of Au to 15%Ni/Al 2 O 3 catalysts used in the steam reforming of methane was investigated by using X-ray diffraction and diffuse reflectance infrared Fourier transform spectroscopy of adsorbed CO.

20 citations

Journal Article•DOI•
Effect of the Pt Precursor and Loading on the Structural Parameters and Catalytic Properties of Pt/Al2O3

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Lais R. Borges1, Alejandro López-Castillo1, Debora M. Meira1, Jean Marcel R. Gallo1, Daniela Zanchet, José Maria C. Bueno1 •
Federal University of São Carlos1
04 Jul 2019-Chemcatchem
TL;DR: In this paper, the effects of Pt loading and the use of chloride additive on the structural properties of Pt/Al2O3 and its catalytic activity towards the WGS reaction were investigated.
Abstract: The effects of promoters and additives on the electronic properties and structural properties of Pt catalysts still need to be understood. The present work investigates the effects of the Pt loading and the use of chloride additive on the structural properties of Pt/Al2O3 and its catalytic activity towards the WGS reaction. The presence of Cl affected the morphology and oxygen coverage of the Pt nanoparticles. However, these parameters did not affect the surface electronic properties, due to a compensation effect between the size of the Pt0 core and oxygen coordinated on the shell (NPt‐O). Despite the structural differences, the catalytic activity for the WGS reaction was similar for the chloride‐free sample and the catalyst containing chloride. The effect of the Pt loading was also studied, with the “apparent” catalytic activity per site of Pt (TOF) decreasing with increasing metal loading. Increasing the Pt loading led to an increase of the low‐coordination Pt0 sites at the surface of the NPs, resulting in stronger Pt‐CO integration and consequent poisoning of the active sites.

13 citations