Dynamic Behavior of Metal Nanoparticles in Pd/C and Pt/C Catalytic Systems under Microwave and Conventional Heating

Pentsak, Evgeniy O.; Cherepanova, Vera A.; Ananikov, Valentine P.

doi:10.1021/acsami.7b09173

Cited by 18 publications

(13 citation statements)

References 48 publications

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“…These processes result in significant changes in the shape, location, size, and binding of palladium nanoparticles influencing the catalyst activity. Compared to solution‐phase processes and homogeneous catalytic reactions, the dynamics of Pd/C material surfaces still need further investigation …”

Section: Discussionmentioning

confidence: 99%

Development of the Applications of Palladium on Charcoal in Organic Synthesis

Liu

Astruc

2018

Adv Synth Catal

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Palladium on charcoal( Pd/C)h as lots of salient merits:( i) it is ac heap andc ommercial source of palladium, (ii)i ts hows efficientc atalytic activity even without ligands,( iii)a saheterogeneous catalyst it is easily recycledm any times by simple filtration,a nd (iv) it is applicablet oag reat number of reactions and substrates,a lthough it is eventually less efficient than homogeneous Pd catalysts containing some sophisticated ligands.T hisr eview recalls the main background ands ummarizes the progress made essentially during the last twelve years in Pd/C-catalyzed organic synthesis since the reviews by Felpins group andSekiin2 006.

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Section: Discussionmentioning

confidence: 99%

Development of the Applications of Palladium on Charcoal in Organic Synthesis

Liu

Astruc

2018

Adv Synth Catal

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“…Deposition of palladium on carbon surfaceThe model utilizes straightforward direct process of deposition of the metal on the carbon material, avoiding the sorption of impurities and additional reagents (for example, modifying chemicals). It is also important to avoid high temperatures, which can affect the sample morphology due to the interaction of metal particles with carbon 26 . For this reason, the Pd 2 dba 3 complex is an appropriate choice as a precursor for the metal nanoparticles.…”

Section: Methodsmentioning

confidence: 99%

Electron microscopy dataset for the recognition of nanoscale ordering effects and location of nanoparticles

et al. 2020

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A unique ordering effect has been observed in functional catalytic nanoscale materials. Instead of randomly arranged binding to the catalyst surface, metal nanoparticles show spatially ordered behavior resulting in formation of geometrical patterns. Understanding of such nanoscale materials and analysis of corresponding microscopy images will never be comprehensive without appropriate reference datasets. Here we describe the first dataset of electron microscopy images comprising individual nanoparticles which undergo ordering on a surface towards the formation of geometrical patterns. The dataset developed in this study spans three levels of nanoscale organization: (i) individual nanoparticles (1-5 nm) and arrays of nanoparticles (5-20 nm), (ii) ordering effects (20-200 nm) and (iii) complex patterns (from nm to μm scales). The described dataset for the first time provides a possibility for the development of machine learning algorithms to study the unique phenomena of nanoparticles ordering and hierarchical organization.

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“…The effect of microwave irradiation has been studied for some systems, such as Pd/C, Pt/C, Ni/C. A number of metals and metal compounds have been shown to promote surface modifications of the support (in the form of trenches and pits) [6,39,40]. The effects of microwave irradiation on mixtures of graphite and carbon black with magnetite or silicon carbide have also been studied [41,42], but the concomitant morphological changes have not been examined.…”

Section: Introductionmentioning

confidence: 99%

Systematic Study of the Behavior of Different Metal and Metal-Containing Particles under the Microwave Irradiation and Transformation of Nanoscale and Microscale Morphology

et al. 2018

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In recent years, the application of microwave (MW) irradiation has played an increasingly important role in the synthesis and development of high performance nanoscale catalytic systems. However, the interaction of microwave irradiation with solid catalytic materials and nanosized structures remains a poorly studied topic. In this paper we carried out a systematic study of changes in morphology under the influence of microwave irradiation on nanoscale particles of various metals and composite particles, including oxides, carbides, and neat metal systems. All systems were studied in the native solid form without a solvent added. Intensive absorption of microwave radiation was observed for many samples, which in turn resulted in strong heating of the samples and changes in their chemical structure and morphology. A comparison of two very popular catalytic materials—metal particles (M) and supported metal on carbon (M/C) systems—revealed a principal difference in their behavior under microwave irradiation. The presence of carbon support influences the heating mechanism; the interaction of substances with the support during the heating is largely determined by heat transfer from the carbon. Etching of the carbon surface, involving the formation of trenches and pits on the surface of the carbon support, were observed for various types of the investigated nanoparticles.

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Dynamic Behavior of Metal Nanoparticles in Pd/C and Pt/C Catalytic Systems under Microwave and Conventional Heating

Cited by 18 publications

References 48 publications

Development of the Applications of Palladium on Charcoal in Organic Synthesis

Development of the Applications of Palladium on Charcoal in Organic Synthesis

Electron microscopy dataset for the recognition of nanoscale ordering effects and location of nanoparticles

Systematic Study of the Behavior of Different Metal and Metal-Containing Particles under the Microwave Irradiation and Transformation of Nanoscale and Microscale Morphology

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