Role of surface coverage of alumina with Pt nanoparticles deposited by laser electrodispersion in catalytic CO oxidation

Голубина, Е. В.; Rostovshchikova, T. N.; Локтева, Е. С.; Маслаков, К. И.; Николаев, С. А.; Шилина, М. И.; Gurevich, S. A.; Kozhevin, V. M.; Yavsin, D. A.; Slavinskaya, Elena M.

doi:10.1016/j.apsusc.2020.147656

Cited by 16 publications

(11 citation statements)

References 77 publications

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“…The theoretical loading of Zn in the ZnHZSM‐5 sample was 2.0 wt%. Pd was loaded on the ZnHZSM‐5 granules (2–4 mm, determined by sieve analysis) by LED technique 17,18 . The resultant catalyst was designated as Pd‐ZnHZSM‐5(LED).…”

Section: Methodsmentioning

confidence: 99%

“…As was outlined previously, 17 the mechanism of the LED process is as follows. Under the high‐power density of laser irradiation, the surface layer of the metal target is melted and the material is evaporated.…”

Section: Methodsmentioning

confidence: 99%

“…One of the methods used to obtain catalysts with a uniform coating of support by metal nanoparticles and with an exceptional stability of the particles to coagulation is laser electrodispersion. Laser electrodispersion was developed at the Ioffe Physical‐Technical Institute, Russian Academy of Sciences (St.‐Petersburg, Russia) 17 . Recently, LED was successfully applied to produce a set of unusually active and stable supported catalysts containing ≤0.001 wt% supported metals 17,18 .…”

Section: Introductionmentioning

confidence: 99%

“…Laser electrodispersion was developed at the Ioffe Physical-Technical Institute, Russian Academy of Sciences (St.-Petersburg, Russia). 17 Recently, LED was successfully applied to produce a set of unusually active and stable supported catalysts containing ≤0.001 wt% supported metals. 17,18 The unique features of an LED catalyst containing 0.001 wt% supported metal can be summarized as the following: pure metal is used to fabricate nanoparticles; particle size depends on the metal and does not depend on the metal loading.…”

Section: Introductionmentioning

confidence: 99%

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Conversion of dimethyl ether to liquid hydrocarbons over the nano‐Pd‐ZnHZSM‐5 catalyst obtained by laser electrodispersion of the metal

Николаев

Matieva

Gurevich

et al. 2022

J of Chemical Tech & Biotech

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BACKGROUND: Palladium particles with a size of 2 nm were obtained by laser electrodispersion (LED) and used to prepare the Pd-ZnHZSM-5(LED) catalyst (Pd = 0.0005 wt%). The deposition of the LED palladium particles on the surface of ZnHZSM-5 provided a high dimethyl ether (DME) conversion into liquid hydrocarbons; the percentage of the unreacted intermediate (methanol) decreased by an order of magnitude and the selectivity for i-alkanes increased (more than 80 wt%). The Pd-ZnНZSM-5 (LED) catalyst showed higher activity and selectivity than the traditional Pd-ZnНZSM-5 catalyst (impregnation).RESULTS: The features of the catalytic action of Pd-ZnHZSM-5(LED) are associated with the high density of nanosized Pd 0 and Pd 2+ phases on the ZnHZSM-5 surface. The LED particles are immersed in the surface of the zeolite to a maximum depth of 0.5 nm and do not penetrate deep into the pores of the zeolite. In Pd-ZnНZSM-5(LED), the zinc sites and palladium sites are separate. On Brønsted acid sites and zinc sites in the micropores of the zeolite occure target reactions. Part of arenes and unreacted alkenes exit the pores of zeolite are hydrogenated on the palladium. The product obtained on Pd-ZnHZSM-5(LED) is characterized by a high content of i-alkanes (more than 80 wt%) and a low content of arenes (no more than 5 wt%). CONCLUSION:The results demonstrate the high promise of the LED method for the preparation of high-performance catalysts with ultra-low content of noble metal for conversion of oxygenates to synthetic liquid hydrocarbons with a high yield of ialkanes and low yield of arenes.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Conversion of dimethyl ether to liquid hydrocarbons over the nano‐Pd‐ZnHZSM‐5 catalyst obtained by laser electrodispersion of the metal

Николаев

Matieva

Gurevich

et al. 2022

J of Chemical Tech & Biotech

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show abstract

“…Noble metal nanoparticles (NPs) on oxide supports are common catalytic materials in several key technologies [1,2] . They have numerous applications in the chemical industry, environmental catalysis, photocatalysis, fuel production, and electrocatalysis [3–6] . The particle–support interactions have been among the most intensively discussed topics in catalysis for more than 30 years.…”

Section: Figurementioning

confidence: 99%

Silica Support Affects the Catalytic Hydrogen Evolution by Silver

et al. 2021

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Silica supported silver nanoparticles, SiO2‐Ag0‐NPs, catalyze the hydrolysis of BH4−. A comparison of the isotopic composition of the hydrogen formed in the hydrolysis of BD4− points out that the contribution of hydrides, the Heyrovsky mechanism, rather than that of hydrogen atoms, the Tafel mechanism, to the hydrogen evolution is considerably larger for the SiO2‐Ag0‐NPs catalyzed process than for the Ag0‐NPs catalyzed process. This indicates some electron transfer from the SiO2 to the silver that increases the negative charge on the Ag0‐NPs.

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

et al. 2022

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Role of surface coverage of alumina with Pt nanoparticles deposited by laser electrodispersion in catalytic CO oxidation

Cited by 16 publications

References 77 publications

Conversion of dimethyl ether to liquid hydrocarbons over the nano‐Pd‐ZnHZSM‐5 catalyst obtained by laser electrodispersion of the metal

Conversion of dimethyl ether to liquid hydrocarbons over the nano‐Pd‐ZnHZSM‐5 catalyst obtained by laser electrodispersion of the metal

Silica Support Affects the Catalytic Hydrogen Evolution by Silver

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

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