A5009856404- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Nanomaterials for catalytic reactions
- Electrochemical Analysis and Applications
- Catalysis and Hydrodesulfurization Studies
- Supercapacitor Materials and Fabrication
- Catalysis and Oxidation Reactions
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Biodiesel Production and Applications
- Electrochemical sensors and biosensors
- Advanced Photocatalysis Techniques
- Asymmetric Hydrogenation and Catalysis
- Advancements in Battery Materials
- Advanced Nanomaterials in Catalysis
- Nanocluster Synthesis and Applications
- Ionic liquids properties and applications
- Oxidative Organic Chemistry Reactions
- Advanced Chemical Sensor Technologies
- Lubricants and Their Additives
- Advanced biosensing and bioanalysis techniques
- Advanced Memory and Neural Computing
- Transition Metal Oxide Nanomaterials
- Catalysts for Methane Reforming
- Gas Sensing Nanomaterials and Sensors
Universidade Federal do Maranhão
2020-2025
Universidade Federal do Rio de Janeiro
2024-2025
Universidade de São Paulo
2012-2020
Universidade Federal do Piauí
2017-2020
Western Kentucky University
2019
Universidad Nacional Autónoma de México
2009
University of California, Davis
2005
Universidad de Valladolid
1995-1997
Metal nanoparticles have received intense scientific attention in the field of catalysis. Precise engineering nanomaterials' size, shape and surface composition, including adsorbed capping ligands, is utmost importance to control activity selectivity, distinguish colloidally prepared metal nanoparticle catalysts from traditional heterogeneous catalysts. The interface between material reaction medium where key interactions occur; therefore, catalysis occurs under influence ligands. In this...
The influence of calcination temperatures on the physical-chemical properties and catalytic performance MoO3 catalysts, synthesized using a hydrothermal approach, was studied. We present herein catalyst calcined at 600 °C able to convert buriti, babassu, soybean, pequi, macauba, waste cooking oils into biodiesel with yields over 90% under optimized conditions. In addition, used up 8 times without significant loss need for washing between one run another. also found out that very small...
A comparative study of the promotion effect weak and strong bases in aqueous oxidation benzyl alcohol by Au/TiO<sub>2</sub> showed that better conversion aldehyde selectivity can be obtained using bases.
The design and development of efficient electrocatalytic sensitive nickel oxide nanomaterials have attracted attention as they are considered cost-effective, stable, abundant sensors. However, although innumerable electrocatalysts been reported, their large-scale production with the same activity sensitivity remains challenging. In this study, we report a simple protocol for gram-scale synthesis uniform NiO nanoflowers (approximately 1.75 g) via hydrothermal method highly selective detection...
Spinel ferrites are versatile, low-cost, and abundant metal oxides with remarkable electronic magnetic properties, which find several applications. Among them, they have been considered part of the next generation electrochemical energy storage materials due to their variable oxidation states, low environmental toxicity, possible synthesis through simple green chemical processing. However, most traditional procedures lead formation poorly controlled (in terms size, shape, composition, and/or...
Abstract Although rhenium may not be the most common choice of active species in catalysis, it has been reported as a highly and selective catalyst over wide range reactions. Its applications include hydrogenation reactions great relevance field renewable materials bio‐derived platform molecules, such valorization lignin, CO 2 , carboxylic acids. Different from several transition metals, presents oxidation numbers varying −3 to +7. Such diversity coordination chemistry is reflected variety...
The aim of this Account is to provide an overview our current research activities on the design and modification superparamagnetic nanomaterials for application in field magnetic separation catalysis. First, introduction magnetism done. Then, synthetic strategies that have been developed generating nanoparticles spherically coated by silica other oxides, with a focus well characterized systems prepared methods generate samples high quality easy scale-up, are discussed. A set magnetically...
Hydrogen (H2) has emerged as a sustainable energy carrier capable of replacing/complementing the global carbon-based matrix. Although studies in this area have often focused on fundamental understanding catalytic processes and demonstration their activities towards different strategies, much effort is still needed to develop high-performance technologies advanced materials accomplish widespread utilization. The main goal review discuss recent contributions H2 production field by employing...
Abstract We synthesized CeO 2 nanowires and nanocubes showing {110}+{100} {100} surfaces predominantly, respectively, once the different surface energies play a crucial role in behavior of Ce 4+ /Ce 3+ reversibility. found out that Pt/CeO presented more content, oxygen vacancies, atomically dispersed Pt, indicating stronger Pt−Ce interaction. In contrast, higher contribution Pt δ+ species, suggesting well‐controlled particle size (∼1 nm) significant interaction with ceria, species available...
MnOx-based nanomaterials are promising large-scale electrochemical energy storage devices due to their high specific capacity, low toxicity, and cost. However, slow diffusion kinetics is still challenging, restricting practical applications. Here, a one-pot straightforward method was reported produce Zn-doped MnOx nanowires with abundant defects tunable small cross-sections, exhibiting an outstanding capacitance. More specifically, based on facile hydrothermal strategy, zinc sites could be...
Abstract Despite all the advances in application of nanoparticle (NP) catalysts, they have received little attention relation to hydroformylation reaction. Herein, we present preparation a catalyst through immobilization air‐stable rhodium NPs onto magnetic support functionalized with chelating phosphine ligands, which serves as an alternative air‐sensitive precursors. The was active and could be used successive reactions negligible metal leaching. interaction between diphenylphosphine...
Although clean energy generation utilizing the Oxygen Reduction Reaction (ORR) can be considered a promising strategy, this approach remains challenging by dependence on high loadings of noble metals, mainly Platinum (Pt). Therefore, efforts have been directed to develop new and efficient electrocatalysts that could decrease Pt content (e.g., nanotechnology tools or alloying) replace them completely in these systems. The present investigation shows catalytic activity reached towards ORR...
The presence of K<sub>2</sub>CO<sub>3</sub> significantly increased the catalytic activity and stability Au NPs supported on magnesium oxide-based supports.