Catalytic properties of monometallic and bimetallic palladium and rhodium nanoparticles obtained in reverse micellar systems

Sergeev, M. O.; Ревина, А. А.; Busev, S. A.; Zolotarevskiy, Victor I.; Zhavoronkova, Kseniya N.; Boeva, O. A.

doi:10.1515/ntrev-2014-0011

Cited by 11 publications

(4 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pd nanoparticles (Fig. 2а) are characterized by peaks with maxima at λ ~ 220, ~272, and ~327 nm, which agrees with the previous data for Pd NPs synthesized through the radiation-chemical method [8][9][10], as well as theoretical calculations and data obtained by other methods [11][12][13]. Analogously with palladium NPs, Ni NPs (Fig.…”

Section: Synthesis Of Metal Nanoparticles Electronic Spectrophotometrysupporting

confidence: 89%

Synthesis of PdNi Bimetallic Nanoparticles and Their Composites in Reverse Micelles

Sergeev

Ревина

Суворова

2021

Prot Met Phys Chem Surf

View full text Add to dashboard Cite

In this work, results of the synthesis of bimetallic nanoparticles (NPs) based on transition metals Pd, Ni, and Fe reduced by quercetin in reverse-micellar solution (RMS) of Н2О/AOT/isooctane are presented. Using fluorescence spectroscopy, the formation of bimetallic structure of PdcoreNishell NP is shown and a synergetic enhancement of optical absorbance is revealed in the plasmon resonance spectra at the wavelength values intrinsic for monometallic NPs. Investigation of the adsorption of bimetallic NPs on the surface of γ-alumina proves the advantage of palladium-containing particles with Fecore/Pdshell obtained as a result of targeted reduction of palladium in RMS on the surface of large Fe NPs, which appears in the increase in the adsorption effectiveness of such a structure due to stronger binding with the carrier surface. This approach decreases the amount of expensive metal during production of palladium nanocomposites through a significant decrease in production costs.

show abstract

Section: Synthesis Of Metal Nanoparticles Electronic Spectrophotometrysupporting

confidence: 89%

Synthesis of PdNi Bimetallic Nanoparticles and Their Composites in Reverse Micelles

Sergeev

Ревина

Суворова

2021

Prot Met Phys Chem Surf

View full text Add to dashboard Cite

show abstract

“…They applied the synthesized NPs for two catalytic reactions, homomolecular isotope exchange of hydrogen gas and ortho-para protium conversion. The Pd core /Rh shell NPs exhibited a four-fold higher catalytic activity (a synergistic effect from having both metals) compared to the mono-metallic NPs in the molecular hydrogen reaction [94]. Subsequently, Revina et al applied the same methods (as Sergeev et al) for preparing Pd, Ru, and Rh NPs and supported them on γ-alumina for some catalytic applications.…”

Section: Recent Investigations On the Microemulsion-based Synthesimentioning

confidence: 99%

A Review of The Lesser-Studied Microemulsion-Based Synthesis Methodologies Used for Preparing Nanoparticle Systems of The Noble Metals, Os, Re, Ir and Rh

2019

View full text Add to dashboard Cite

This review focuses on the recent advances in the lesser-studied microemulsion synthesis methodologies of the following noble metal colloid systems (i.e., Os, Re, Ir, and Rh) using either a normal or reverse micelle templating system. The aim is to demonstrate the utility and potential of using this microemulsion-based approach to synthesize these noble metal nanoparticle systems. Firstly, some fundamentals and important factors of the microemulsion synthesis methodology are introduced. Afterward, a review of the investigations on the microemulsion syntheses of Os, Re, Ir, and Rh nanoparticle (NP) systems (in all forms, viz., metallic, oxide, mixed-metal, and discrete molecular complexes) is presented for work published in the last ten years. The chosen noble metals are traditionally very reactive in nanosized dimensions and have a strong tendency to aggregate when prepared via other methods. Also, the particle size and particle size distribution of these colloids can have a significant impact on their catalytic performance. It is shown that the microemulsion approach has the capability to better stabilize these metal colloids and can control the size of the synthesized NPs. This generally leads to smaller particles and higher catalytic activity when they are tested in applications.

show abstract

“…Such bimetallic catalysts exhibit the combined properties of two individual metals, and thus, it generates unique properties and catalytic activity due to synergetic effects between the two metals that are present in the bimetallic catalyst. [23,24] Instability concern is associated to the MNPs, which usually get easily self-aggregated and oxidize. Thus, different supporting materials have been utilized to stabilize the MNPs, but in most of the cases, the activity of MNPs is reduced with supporting material because nanoparticles get entrenched in the supporting material, which results in less exposure to the reactants and as a result causes reduction in catalytic activity of MNPs.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Chitosan hydrogel wrapped bimetallic nanoparticles based efficient catalysts for the catalytic removal of organic pollutants and hydrogen production

Bakhsh

Khan

Akhtar

et al. 2022

Applied Organom Chemis

View full text Add to dashboard Cite

A novel catalytic system based on bimetallic nanoparticles entrapped chitosan hydrogel container (Cu–Ag/CH, Cu–Co/CH, Cu–Ni/CH) was prepared. The developed catalytic system was applied for production of H2 from water and methanol and reduction of 4‐nitrophenol (4‐NP), 3‐nitrophenol, 2‐nitrophenol, 2,6‐dinitrophenol, methylene blue, congo red (CR), methyl orange, acridine orange, and potassium ferricynide (K3[Fe(CN)6]). The developed catalytic system has shown tremendous performance and exhibited high efficiency as a catalyst for water treatment and H2 generation. Among all the nanocatalysts, Cu–Co/CH was more efficient in catalytic H2 generation while Cu–Ni/CH was more efficient in catalytic reduction of toxic contaminants. Further, various parameters like amount of NaBH4, catalyst quantity, pollutant concentration, and temperature were optimized to enhance the effectiveness of catalytic system for fast production of H2 and reduction of toxins. Moreover, the recyclability of the catalyst was investigated, where slight decrease in reduction time was noted.

show abstract

Catalytic properties of monometallic and bimetallic palladium and rhodium nanoparticles obtained in reverse micellar systems

Cited by 11 publications

References 3 publications

Synthesis of PdNi Bimetallic Nanoparticles and Their Composites in Reverse Micelles

Synthesis of PdNi Bimetallic Nanoparticles and Their Composites in Reverse Micelles

A Review of The Lesser-Studied Microemulsion-Based Synthesis Methodologies Used for Preparing Nanoparticle Systems of The Noble Metals, Os, Re, Ir and Rh

Chitosan hydrogel wrapped bimetallic nanoparticles based efficient catalysts for the catalytic removal of organic pollutants and hydrogen production

Contact Info

Product

Resources

About