Search Results - "Fajardo, Humberto V."

Correlation of catalytic oxidation and ionic conductivity properties of nanostructured gadolinium-doped ceria by Godinho, Mario, Rodrigues, Murillo H.M., F. Gonçalves, Rosana de, Roca, Román Alvarez, Longo, Elson, Mota, Fabiana Villela, Fajardo, Humberto V., Balzer, Rosana

“…[Display omitted] •The highest ionic conductivity and conversion at 400 °C were obtained for the Ce0.85Gd0.15O1.9−δ sample.•The Ce0.85Gd0.15O1.9−δ presented…”
Get full text

Direct decomposition of methane over Ni catalyst supported in magnesium aluminate by Nuernberg, Giselle D.B., Foletto, Edson L., Campos, Carlos E.M., Fajardo, Humberto V., Carreño, Neftalí L.V., Probst, Luiz F.D.

“…► Direct decomposition of methane over Ni catalyst supported in MgAl2O4 was investigated. ► The influence of N2:CH4 molar ratio and catalyst reduction…”
Get full text

MnO2-Ir Nanowires: Combining Ultrasmall Nanoparticle Sizes, O-Vacancies, and Low Noble-Metal Loading with Improved Activities towards the Oxygen Reduction Reaction by de Lima, Scarllett L. S., Pereira, Fellipe S., de Lima, Roberto B., de Freitas, Isabel C., Spadotto, Julio, Connolly, Brian J., Barreto, Jade, Stavale, Fernando, Vitorino, Hector A., Fajardo, Humberto V., Tanaka, Auro A., Garcia, Marco A. S., da Silva, Anderson G. M.

“…Although clean energy generation utilizing the Oxygen Reduction Reaction (ORR) can be considered a promising strategy, this approach remains challenging by the…”
Get full text

Preparation and evaluation of CO/Al2O3 catalysts in the production of hydrogen from thermo-catalytic decomposition of methane : Influence of operating conditions on catalyst performance by NUERNBERG, Giselle B, FAJARDO, Humberto V, MEZALIRA, Daniela Z, CASARIN, Tamara J, PROBST, Luiz F. D, CARRENO, Neftali L. V

“…This paper presents the synthesis of Co-doped Al2O3 catalysts, developed by our group, with porous structures and high surface areas. The catalytic activity of…”
Get full text

Synthesis of mesoporous Al2O3 macrospheres using the biopolymer chitosan as a template: A novel active catalyst system for CO2 reforming of methane by Fajardo, Humberto V., Martins, Amarildo O., de Almeida, Rusiene M., Noda, Lúcia K., Probst, Luiz F.D., Carreño, Neftalí L.V., Valentini, Antoninho

“…A new and simple method to prepare alumina containing mainly mesopores is described. This alumina has a high surface area (464 m2/g) and a large pore volume…”
Get full text

Oxidation of Thioanisole Using Niobium–Silica Catalysts: Theoretical and Experimental Studies by Fajardo, Humberto V., Taylor, Jason G., Teixeira, Moisés P., Chagas, Poliane, Oliveira, Luiz C. A., Gonçalves, Matheus A., Ramalho, Teodorico C., Silva, Adilson C.

“…Catalysts containing supported metal oxides are very versatile materials used in liquid phase oxidation reactions. The present study aimed to determine the…”
Get full text

Influence of Rare Earth Doping on the Structural and Catalytic Properties of Nanostructured Tin Oxide by Fajardo, Humberto V, Longo, Elson, Probst, LuizFD, Valentini, Antoninho, Carreño, NeftalíLV, Nunes, Michael R, Maciel, Adeilton P, Leite, Edson R

“…Nanoparticles of tin oxide, doped with Ce and Y, were prepared using the polymeric precursor method. The structural variations of the tin oxide nanoparticles…”
Get full text

Synergistic effect between CeO2 nanowires and gold NPs over the activity and selectivity in the oxidation of thioanisole by Rosado, Taíssa F., Teixeira, Moisés P., Moraes, Leonardo C., Silva, Leonardo A. da, Pontes-Silva, Augusto V., Taylor, Jason G., de Freitas, Isabel C., de Oliveira, Daniela C., Gardener, Jules, Solórzano, Guilhermo, Alves, Tiago V., Venancio, Mateus F., da Silva, Maria I.P., Brocchi, Eduardo, Fajardo, Humberto V., da Silva, Anderson G.M.

“…[Display omitted] •Gold NPs incorporated on CeO2 nanowires were produced by a simple approach.•CeO2-Au NPs as efficient catalysts towards the selective…”
Get full text

Preparation, characterization and catalytic application of Barium molybdate (BaMoO4) and Barium tungstate (BaWO4) in the gas-phase oxidation of toluene by Alencar, Lorena.D.S., Mesquita, Alexandre, Feitosa, Carlos A.C., Balzer, Rosana, Probst, Luiz F.D., Batalha, Daniel C., Rosmaninho, Marcelo G., Fajardo, Humberto V., Bernardi, Maria I.B.

“…Barium molybdate and Barium tungstate are important materials due their photoluminescent properties and they also have catalysis and photocatalysis…”
Get full text

Synthesis of NiMoO4 ceramics by proteic sol-gel method and investigation of their catalytic properties in hydrogen production by da Silva, Maíra V., Fajardo, Humberto V., Rodrigues, Thenner S., e Silva, Felipe A., Bergamaschi, Vanderlei S., Dias, Anderson, Siqueira, Kisla P.F.

“…A proteic sol-gel route was used in the production of NiMoO4 catalysts, which used edible gelatin as a precursor. The triple helix structure of a protein in…”
Get full text

Combining active phase and support optimization in MnO2-Au nanoflowers: Enabling high activities towards green oxidations by da Silva, Anderson G.M., Rodrigues, Thenner S., Candido, Eduardo G., de Freitas, Isabel C., da Silva, Alisson H.M., Fajardo, Humberto V., Balzer, Rosana, Gomes, Janaina F., Assaf, Jose M., de Oliveira, Daniela C., Oger, Nicolas, Paul, Sebastien, Wojcieszak, Robert, Camargo, Pedro H.C.

“…[Display omitted] Among the several classes of chemical reactions, the green oxidation of organic compounds has emerged as an important topic in nanocatalysis…”
Get full text

Influence of Nb2O5 grown on SrTiO3 nanoseeds in the catalytic oxidation of thioanisole by Riemke, Fábio C., Ücker, Cátia L., Carreño, Neftalí L.V., da Silva Cava, Sergio, Teixeira, Moisés P., Fajardo, Humberto V., Taylor, Jason G., da Silva, Márcio J., Batalha, Daniel C., Raubach, Cristiane W.

“…There is a growing interest on the reach for new environmentally friendly catalysts especially solid metal oxides. The functional properties of SrTiO3 (STO)…”
Get full text

Versatile and efficient catalysts for energy and environmental processes: Mesoporous silica containing Au, Pd and Au-Pd by da Silva, Anderson G.M., Fajardo, Humberto V., Balzer, Rosana, Probst, Luiz F.D., Lovón, Adriana S.P., Lovón-Quintana, Juan J., Valença, Gustavo P., Schreine, Wido H., Robles-Dutenhefner, Patrícia A.

“…We described a versatile approach for the synthesis of Au/MCM-41, Pd/MCM-41 and Au-Pd/MCM-41 by the direct incorporation of the noble metals into the MCM-41…”
Get full text

Low temperature liquid phase catalytic oxidation of aniline promoted by niobium pentoxide micro and nanoparticles by Ventura, Wellington M., Batalha, Daniel C., Fajardo, Humberto V., Taylor, Jason G., Marins, Natália H., Noremberg, Bruno S., Tański, Tomasz, Carreño, Neftalí L.V.

“…A microwave-assisted hydrothermal method was employed to synthesis Nb2O5 (niobium pentoxide) nanoparticles and the effects of synthesis conditions on the…”
Get full text

1D coordination polymer based on copper(II)-containing tetrameric 1,2,3-triazole ligand from click chemistry: Magnetic and catalytic properties by Moraes, Leonardo C., de Souza, Gilmar P., Fajardo, Humberto V., Luz, Sulusmon C., Álvarez, Eleuterio, Lloret, Francesc, Ribeiro-Viana, Renato M., Rojo, Javier, Stumpf, Humberto O., Figueiredo, Rute C., Corrêa, Rodrigo S.

“…[Display omitted] •A new tetrameric ligand (TBTP) was synthesized using click chemistry strategy.•Copper(II) with TBTP form 1-D coordination polymer.•1-D…”
Get full text

Controlling Size, Morphology, and Surface Composition of AgAu Nanodendrites in 15 s for Improved Environmental Catalysis under Low Metal Loadings by da Silva, Anderson G. M, Rodrigues, Thenner S, Slater, Thomas J. A, Lewis, Edward A, Alves, Rafael S, Fajardo, Humberto V, Balzer, Rosana, da Silva, Alisson H. M, de Freitas, Isabel C, Oliveira, Daniela C, Assaf, Jose M, Probst, Luiz F. D, Haigh, Sarah J, Camargo, Pedro H. C

“…In this work, a simple but powerful method for controlling the size and surface morphology of AgAu nanodendrites is presented. Control of the number of Ag…”
Get full text

Efficient ceria–silica catalysts for BTX oxidation: Probing the catalytic performance and oxygen storage by da Silva, Anderson G.M., Fajardo, Humberto V., Balzer, Rosana, Probst, Luiz F.D., Prado, Nayara T., Camargo, Pedro H.C., Robles-Dutenhefner, Patricia A.

“…•CeO2 based catalysts were prepared by impregnation method and MCM-41 supports.•The method of preparation affects the dispersion/incorporation of the CeO2…”
Get full text

Pd-based nanoflowers catalysts: controlling size, composition, and structures for the 4-nitrophenol reduction and BTX oxidation reactions by da Silva, Anderson G. M, Rodrigues, Thenner S, Taguchi, Laís S. K, Fajardo, Humberto V, Balzer, Rosana, Probst, Luiz F. D, Camargo, Pedro H. C

“…We describe herein the synthesis of solid Au@Pd and hollow AgPd nanoflowers displaying controlled sizes and compositions in order to investigate how their…”
Get full text

Magnesium oxide prepared via metal–chitosan complexation method: Application as catalyst for transesterification of soybean oil and catalyst deactivation studies by Almerindo, Gizelle I., Probst, Luiz F.D., Campos, Carlos E.M., de Almeida, Rusiene M., Meneghetti, Simoni M.P., Meneghetti, Mario R., Clacens, Jean-Marc, Fajardo, Humberto V.

“…► Magnesium oxide prepared via metal-chitosan complexation method. ► Magnesium oxide catalysts for biodiesel production by transesterification. ► Deactivation…”
Get full text

Preparation, structural characterization and catalytic properties of Co/CeO2 catalysts for the steam reforming of ethanol and hydrogen production by Lovón, Adriana S.P., Lovón-Quintana, Juan J., Almerindo, Gizelle I., Valença, Gustavo P., Bernardi, Maria I.B., Araújo, Vinícius D., Rodrigues, Thenner S., Robles-Dutenhefner, Patrícia A., Fajardo, Humberto V.

“…In this paper, Co/CeO2 catalysts, with different cobalt contents were prepared by the polymeric precursor method and were evaluated for the steam reforming of…”
Get full text