Laser Electrodispersion of Metals for the Synthesis of Nanostructured Catalysts: Achievements and Prospects

Rostovshchikova, T. N.; Локтева, Е. С.; Шилина, М. И.; Голубина, Е. В.; Маслаков, К. И.; Кротова, И. Н.; Bryzhin, A. A.; Tarkhanova, I. G.; Удалова, О. В.; Kozhevin, V. M.; Yavsin, D. A.; Gurevich, S. A.

doi:10.1134/s0036024421030171

Cited by 11 publications

(5 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Pd target was exposed to radiation from a pulsed YAG:Nd laser (wavelength 1.06 μm, pulse duration 30 ns, pulse energy 120 mJ), which resulted in the generation of a stream of Pd nanoparticles propagating from the target. The details of the particle formation mechanism in the LED process are given elsewhere [67]. A weighted amount of support granules was placed in a special cell equipped with a piezoelectric plate.…”

Section: Preparation Of the Catalystsmentioning

confidence: 99%

“…As an alternative, one-step and environmentally friendly methods based on laser ablation are increasingly being used for the deposition of metal particles in the synthesis of catalysts [64][65][66]. Among them, the laser electrodispersion (LED) method developed at the Ioffe Physicotechnical Institute (St. Petersburg, Russia) is an outstanding one [67]. This method allows depositing one-size nanoparticles directly on the surface of the granulated support without the use of a liquid to stabilize them [67][68][69][70][71][72][73][74].…”

Section: Introductionmentioning

confidence: 99%

“…Among them, the laser electrodispersion (LED) method developed at the Ioffe Physicotechnical Institute (St. Petersburg, Russia) is an outstanding one [67]. This method allows depositing one-size nanoparticles directly on the surface of the granulated support without the use of a liquid to stabilize them [67][68][69][70][71][72][73][74]. It was shown to be applicable and effective for the synthesis of mono-and bimetallic systems of different compositions: Pd [68,73,74], Pt [69], Ni-Pd [70], Pd-Zn [71], and Pt-Co [72].…”

Section: Introductionmentioning

confidence: 99%

“…In many catalytic processes, LED-prepared catalysts are superior not only in activity but also in stability if compared to catalysts prepared by conventional chemical methods (incipient wetness impregnation, precipitation from colloidal dispersions, etc.) [67].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Studies on High-Temperature Evolution of Low-Loaded Pd Three-Way Catalysts Prepared by Laser Electrodispersion

et al. 2023

View full text Add to dashboard Cite

Pd/Al2O3 catalyst of the “crust” type with Pd loading of 0.03 wt.% was prepared by the deposition of 2 nm Pd particles on the outer surface of the alumina support using laser electrodispersion (LED). This technique differs from a standard laser ablation into a liquid in that the formation of monodisperse nanoparticles occurs in the laser torch plasma in a vacuum. As is found, the LED-prepared catalyst surpasses Pd-containing three-way catalysts, obtained by conventional chemical synthesis, in activity and stability in CO oxidation under prompt thermal aging conditions. Thus, the LED-prepared Pd/Al2O3 catalyst showed the best thermal stability up to 1000 °C. The present research is focused on the study of the high-temperature evolution of the Pd/Al2O3 catalyst in two reaction mixtures by a set of physicochemical methods (transmission electron microscopy, X-ray photoelectron spectroscopy, and diffuse reflectance UV-vis spectroscopy). In order to follow the dispersion of the Pd nanoparticles during the thermal aging procedure, the testing reaction of ethane hydrogenolysis was also applied. The possible reasons for the high stability of LED-prepared catalysts are suggested.

show abstract

Section: Preparation Of the Catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Studies on High-Temperature Evolution of Low-Loaded Pd Three-Way Catalysts Prepared by Laser Electrodispersion

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Whereas the controlled chemical synthesis of low percentage catalysts remains a challenge, one-step and size-controlled methods of nanoparticle deposition based on laser ablation in liquid have begun to be widely used in the synthesis of catalysts [ 59 , 60 , 61 , 62 ]. Among them, laser electrodispersion (LED) of metal [ 63 , 64 ] seems to be a prospective technique for preparing catalysts containing ultra-low metal concentrations. In this method, a laser attacks a metal target in a vacuum, which leads to the formation of metal drops.…”

Section: Introductionmentioning

confidence: 99%

High-Temperature Behavior of Laser Electrodispersion-Prepared Pd/ZSM-5 Hydrocarbon Traps under CO Oxidation Conditions

et al. 2023

View full text Add to dashboard Cite

Zeolites and metal-doped zeolites are now widely considered as low-temperature hydrocarbon traps to be a part of emission control systems in automobiles. However, due to the high temperature of exhaust gases, the thermal stability of such sorbent materials is of great concern. To avoid the thermal instability problem, in the present work, laser electrodispersion was used to deposit Pd particles on the surface of ZSM-5 zeolite grains (SiO2/Al2O3 = 55 and SiO2/Al2O3 = 30) to obtain Pd/ZSM-5 materials with a Pd loading as low as 0.03 wt.%. The thermal stability was evaluated in a prompt thermal aging regime involving thermal treatment at temperatures up to 1000 °C in a real reaction mixture (CO, hydrocarbons, NO, an excess of O2, and balance N2) and a model mixture of the same composition with the exception of hydrocarbons. Low-temperature nitrogen adsorption and X-ray diffraction analysis were used to examine the stability of the zeolite framework. Special attention was paid to the state of Pd after thermal aging at varied temperatures. By means of transmission electron microscopy, X-ray photoelectron spectroscopy, and diffuse reflectance UV–Vis spectroscopy, it was shown that palladium, having been initially located on the surface of zeolite, undergoes oxidation and migrates into the zeolite’s channels. This enhances the trapping of hydrocarbons and their subsequent oxidation at lower temperatures.

show abstract

Features and mechanisms of coalescence of nanodroplets and sintering of metal nanoparticles: molecular dynamics simulation

et al. 2022

View full text Add to dashboard Cite

Laser Electrodispersion of Metals for the Synthesis of Nanostructured Catalysts: Achievements and Prospects

Cited by 11 publications

References 76 publications

Studies on High-Temperature Evolution of Low-Loaded Pd Three-Way Catalysts Prepared by Laser Electrodispersion

Studies on High-Temperature Evolution of Low-Loaded Pd Three-Way Catalysts Prepared by Laser Electrodispersion

High-Temperature Behavior of Laser Electrodispersion-Prepared Pd/ZSM-5 Hydrocarbon Traps under CO Oxidation Conditions

Features and mechanisms of coalescence of nanodroplets and sintering of metal nanoparticles: molecular dynamics simulation

Contact Info

Product

Resources

About