ZSM-5 and BEA zeolites modified with Pd nanoparticles by laser electrodispersion. The structure and catalytic activity in CO and CH4 oxidation

Rostovshchikova, T. N.; Николаев, С. А.; Кротова, И. Н.; Маслаков, К. И.; Удалова, О. В.; Gurevich, S. A.; Yavsin, D. A.; Шилина, М. И.

doi:10.1007/s11172-022-3519-x

Cited by 10 publications

(10 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Transmission electron microscopy (TEM) studies were performed using a JEOL JEM 2100F/UHR instrument (Tokyo, Japan) with a resolution of 0.2 nm and a maximum magnification of ×106 times equipped with an energy dispersive X-ray (EDX) accessory. Each sample was prepared for TEM studies as described elsewhere [73,74].…”

Section: Characterization Of the Materialsmentioning

confidence: 99%

“…The energy scale of the XPS spectra for the samples on Al 2 O 3 was preliminarily calibrated using an Al2p peak at 74.4 eV as an internal standard. Deconvolution of Pd3d peaks into three components was performed as described previously [73,75]. The following parameters were applied: the Shirley background; GL (30) line shapes; and binding energies of 335.7 eV (Pd 0 ), 336.9 eV (PdO), and 338.3 eV (a doublet component associated with Pd(OH) 2 or Pd 2+ cations coordinated by the oxygen atoms of the support) [76].…”

Section: Characterization Of the Materialsmentioning

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%

“…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]. Alumina, various zeolites, and carbon materials were used as support in these works.…”

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: Characterization Of the Materialsmentioning

confidence: 99%

Section: Characterization Of the Materialsmentioning

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

“…These particles are then deposited on the outer surface of the granulated support. The LED method was successfully applied for the preparation of monodispersed crust-like catalysts based on supports of various natures such as alumina, zeolites, and carbon for different reactions [ 65 , 66 , 67 ].…”

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

Comparison of palladium leaching from the Pd/MWCNT catalyst in important organic synthesis reactions

Pentsak

Galushko

2023

Russ Chem Bull

View full text Add to dashboard Cite

ZSM-5 and BEA zeolites modified with Pd nanoparticles by laser electrodispersion. The structure and catalytic activity in CO and CH4 oxidation

Cited by 10 publications

References 45 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

Comparison of palladium leaching from the Pd/MWCNT catalyst in important organic synthesis reactions

Contact Info

Product

Resources

About