Preparation of rhodium nano-particles using microwaves

Ugalde, M.; Chavira, E.; Figueroa, I.A.; Quintanar, Carlos; Espinosa‐Magaña, F.; Zaragoza‐Contreras, Erasto Armando; Ochoa-Lara, M.T.

doi:10.1007/s10971-012-2937-x

Cited by 6 publications

(2 citation statements)

References 22 publications

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“…Further, no obvious peaks ascribed to Pd at 41°, 55° and 68° were observed, which indicates that the Pd species are well dispersed on the support. This phenomenon is attributed to the microwave heating for the hydrothermal synthesis of the noble metal clusters [38]. Thus, it can be inferred that microwave heating leads to Pd species with a narrow size distribution and good dispersity on ZrO2 nanospheres.…”

Section: Electron Microscopymentioning

confidence: 96%

Regenerable Subnanometer Pd Clusters on Zirconia for Highly Selective Hydrogenation of Biomass-Derived Succinic Acid in Water

Zhang¹,

Cao²,

Cheng³

et al. 2016

Catalysts

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Abstract:The size of metal particles is an important factor to determine the performance of the supported metal catalysts. In this work, we report subnanometer Pd clusters supported on zirconia by the microwave-assisted hydrothermal method. The presence of subnanometer Pd clusters on the zirconia surface was confirmed by two-dimensional Gaussian-function fits of the aberration-corrected high-angle annual dark-field images. These subnanometer Pd catalysts exhibit high catalytic performance for the hydrogenation of biomass-derived succinic acid to γ-butyrolactone in water and avoid the formation of overhydrogenated products, such as 1,4-butanediol and tetrahydrofuran. The catalyst with an ultra-low Pd loading of 0.2 wt. % demonstrated high selectivity (95%) for γ-butyrolactone using water as a solvent at 473 K and 10 MPa. Moreover, it can be reused at least six times without the loss of catalytic activity, illustrating high performance of the small Pd clusters.

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Section: Electron Microscopymentioning

confidence: 96%

Regenerable Subnanometer Pd Clusters on Zirconia for Highly Selective Hydrogenation of Biomass-Derived Succinic Acid in Water

Zhang¹,

Cao²,

Cheng³

et al. 2016

Catalysts

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show abstract

“…On the other hand, microwave (MW) irradiation is one of the most sophisticated methods for the preparation of nanoparticles with controlled size and shape. − In the past decade, there has been increasing attention in the use of MW heating instead of conventional heating in various kinds of monometallic and bimetallic nanoparticle syntheses, − because MW heating has been shown to reduce dramatically the reaction times and to enhance the purity of the nanoparticles produced. For example, Bensebaa et al used MW heating to produce Pt/Ru bimetallic nanoparticles in ethylene glycol (EG) solution dissolving PVP and demonstrated that microwave preparation parameters are linked to surface composition and structure.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Polyol Synthesis of Pt/Pd and Pt/Rh Bimetallic Nanoparticles in Polymer Solutions Prepared by Batch and Continuous-Flow Processing

Cong

Nakayama

Maenosono

et al. 2017

Ind. Eng. Chem. Res.

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Colloidal dispersions of Pt/Pd and Pt/Rh bimetallic nanoparticles have been synthesized by a microwave-assisted polyol method using ethylene glycol and glycerol as a solvent in the presence of poly(N-vinyl-2-pyrrolidone) (PVP). The structure of bimetallic nanoparticles has been investigated by means of high-resolution transmission electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDS) elemental mapping, and extended X-ray absorption fine structure (EXAFS). The effectiveness of the batch and continuous-flow processing was demonstrated for the preparation of various bimetallic nanoparticles under multimode or single-mode microwave irradiation. In the single-mode microwave-assisted continuous-flow processing in contrast to the batch processing, the well-dispersed colloidal bimetallic nanoparticles were successfully produced at the boiling temperature of solvent. EXAFS analysis indicated that, in the case of Pt/Pd (1/1) and Pt/Rh (1/1) bimetallic nanoparticles prepared using both batch and continuous-flow processing, the distribution of different metallic species in a particle tended to be a “cluster-in-cluster” structure.

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Polymorphic synthesis and structural characterization of NaSbO3 prepared by sol–gel acrylamide polymerization

Quiroz-Rodríguez

Chavira

Palomino-Merino

et al. 2022

Journal of Solid State Chemistry

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Preparation of rhodium nano-particles using microwaves

Cited by 6 publications

References 22 publications

Regenerable Subnanometer Pd Clusters on Zirconia for Highly Selective Hydrogenation of Biomass-Derived Succinic Acid in Water

Regenerable Subnanometer Pd Clusters on Zirconia for Highly Selective Hydrogenation of Biomass-Derived Succinic Acid in Water

Microwave-Assisted Polyol Synthesis of Pt/Pd and Pt/Rh Bimetallic Nanoparticles in Polymer Solutions Prepared by Batch and Continuous-Flow Processing

Polymorphic synthesis and structural characterization of NaSbO3 prepared by sol–gel acrylamide polymerization

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