Nanocatalysis by noble metal nanoparticles: controlled synthesis for the optimization and understanding of activities

Rodrigues, Thenner Silva; Silva, Anderson G. M. da; Camargo, Pedro H. C.

doi:10.1039/c9ta00074g

Cited by 275 publications

(196 citation statements)

References 129 publications

Supporting

Mentioning

193

Contrasting

Unclassified

Order By: Relevance

“…For example, porous silica particles find widescale application as catalyst supports (also in nanocomposite catalysts), adsorbents, molecular sieves, chemical sensors, etc. [9][10][11][12][13]. Recent research also found mesoporous silica particles to be very promising medical drug carriers [14].…”

Section: Numerousmentioning

confidence: 99%

Porosity determination of nano- and sub-micron particles by single particle inductively coupled plasma mass spectrometry

Kéri

Sápi

Ungor

et al. 2020

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

show abstract

Section: Numerousmentioning

confidence: 99%

Porosity determination of nano- and sub-micron particles by single particle inductively coupled plasma mass spectrometry

Kéri

Sápi

Ungor

et al. 2020

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

show abstract

“…Nanoparticles as a catalyst have recently attracted the attention of the scientific community because of their high selectivity, durability, recoverability with considerable economic benefits in manufacturing as an industrial commodity. [1] Metal nanoparticles as catalysts are popular owing to their high surface area properties, leading to enhanced interaction between reactant and catalyst surface, hence high activities observed even under mild conditions. [2] Nanocatalysts have various applications in numerous fields such as refinery, petrochemicals, pharmaceuticals, chemicals, food processing.…”

Section: Introductionmentioning

confidence: 99%

Ketone Hydrogenation by Using ZnO−Cu(OH)Cl/MCM‐41 with a Splash of Water: An Environmentally Benign Approach

Choudhary

Ghosh

Mobin

2020

Chemistry An Asian Journal

View full text Add to dashboard Cite

MCM-41-supported ZnOÀ Cu(OH)Cl nanoparticles were synthesized via an incipient wetness impregnation technique using zinc chloride and copper chloride salts as well as water at room temperature. The catalyst was characterized by powder X-ray diffraction (PXRD), infrared spectroscopy (IR), and TGA, whereas surface and morphological studies were performed by using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The above studies revealed the incorporation of metal species into the pores of MCM-41, leading to a decrease in surface area of the nanoparticles that was found to be 239.079 m 2 /g. The substituents attached to the ketone determine the rate of the reaction, and the utilization of the green solvent 'water' astonishingly completes the hydrogenation reaction in 45 minutes at 40°C with 100% conversion and 100% selectivity as analyzed by gas chromatography-mass spectrometry. Hence, ZnOÀ Cu(OH)Cl/MCM-41 nanoparticles with 2.46 wt% zinc and 6.39 wt% copper were demonstrated as an active catalyst for the reduction of ketones without using any gaseous hydrogen source making it highly efficient as well as environmentally and economically benign.

show abstract

“…[ 5 ] Due to the high surface to volume ratio, these nanoscale metals, particularly platinum (Pt) and palladium (Pd), are also effective catalysts for various chemical reactions. [ 6 ] To dates, various types of metal nanoparticles (e.g., triangular Au nanoplates, [ 7 ] Ag nanocubes, [ 8 ] and Pt nanoboxes [ 9 ] ) with tunable size and shapes have been successfully synthesized. [ 7,9,10 ] Among them, anisotropic silver nanostructures with sharp corners (e.g., bipyramid) and polyhedral nanocrystals with defined crystallographic facets (e.g., (111) and (100)) are of great importance due to their lower energy loss and stronger electric field, [ 11 ] which are well suited for metal‐enhanced fluorescence (MEF), [ 3b,12 ] metal‐enhanced singlet oxygen generation (ME‐SOG), [ 3b,13 ] and surface‐enhanced Raman scattering (SERS) [ 3b,14 ] applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Simulation Study of Right Silver Bipyramids via Seed‐Mediated Growth cum Selective Oxidative Etching Approach

Yaraki

Rezaei

Middha

et al. 2020

Part & Part Syst Charact

View full text Add to dashboard Cite

In this study, a simple method to synthesize right silver bipyramid (AgBP) nanostructures via the seed‐mediated growth cum oxidative etching approach in aqueous solution is developed. The key strategy of this method is to control the growth and etching process by careful adjustment of the reactants concentration. Ascorbic acid (AA) is used to reduce silver precursor while cetyltrimethylammonium bromide stabilizer is used to direct the preferential growth of (100) facets. The presence of Cu2+ and AA in the reaction mixture also enable in‐situ generation of H2O2, leading to selective etching of (111) facets, which is crucial to the formation of anisotropic AgBPs. The structure‐properties of AgBPs is systematically investigated through a series of experiments and theoretical simulations. Transmission electron microscope images and X‐ray diffraction patterns of the as‐synthesized AgBPs show the formation of single crystalline twined nanostructures with a relatively high yield. These results suggest the important role of the excitation of electric dipole in enhancing the electric field at the six sharp corners of AgBPs, making them especially promising for a wide range of technological applications including surface‐enhanced Raman scattering with a significant enhancement factor of 1.50 × 105 as demonstrated herein.

show abstract

Nanocatalysis by noble metal nanoparticles: controlled synthesis for the optimization and understanding of activities

Abstract: This review discusses the importance of physical/chemical control in metallic NPs for the optimization and understanding of catalytic performances.

Cited by 275 publications

References 129 publications

Porosity determination of nano- and sub-micron particles by single particle inductively coupled plasma mass spectrometry

Porosity determination of nano- and sub-micron particles by single particle inductively coupled plasma mass spectrometry

Ketone Hydrogenation by Using ZnO−Cu(OH)Cl/MCM‐41 with a Splash of Water: An Environmentally Benign Approach

Synthesis and Simulation Study of Right Silver Bipyramids via Seed‐Mediated Growth cum Selective Oxidative Etching Approach

Contact Info

Product

Resources

About