Micelles as Supercages for Bimetallic Nanoparticles Synthesis| Chapter 8 | Recent Progress in Science and Technology Vol. 2

 The bettering of the bimetallic nanoparticles characteristics depends the ability to tune the alloy arrangement and surface features, which requires an progressive control of the synthetic design. We carried out a calculating simulation study on the formation of bimetallic nanoparticles apiece microemulsion route. A comprehensive reasoning of the resulting nanostructures was acted in the light of the influence of intermicellar exchange on reactivity. For a couple of metals whose dissimilarity in standard reduction potentials is about 0.2- 0.3 V, and utilizing a quite flexible surfactant, the response rate of each metal was listened versus occasion using different catalyst proportions. It was confirmed that reaction rates depends not only on the synthetic reduction rate but also on intermicellar rate of exchange, because the intermicellar exchange plays as drug pump, which results in an growth of slower forerunners within micelles, with improving the slower synthetic reduction. So the duller reduction rate strongly depends on the portion of reactants in micelles. On the contrary, faster reduction rate is just restricted by the intermicellar rate of exchange, and no reactants accumulation takes place. This different interaction between two together metal decline rates and the compartmentalization of the reaction media have key consequences on the sequence of metals decline. Hence different precursor portions leads to different sequences of metals decline, so the arrangement of two together metals in the resulting nanostructure can be maneuvered just by changing the forerunner proportions.

Author(s) Details:

C. Tojo,
Physical Chemistry Department, Faculty of Chemistry, University of Vigo, E-36310, Vigo, Spain.

E. Gonzalez,
Physical Chemistry Department, Faculty of Chemistry, University of Vigo, E-36310, Vigo, Spain.

N. Vila-Romeu,
Physical Chemistry Department, Faculty of Sciences, University of Vigo, E-32004, Ourense, Spain.

Please see the link here: https://stm.bookpi.org/RPST-V2/article/view/9239

Modeling Core-Shell Nanocatalysts Preparation using Water in Oil Microemulsions | Chapter 9 | Research Aspects in Chemical and Materials Sciences Vol. 1

 The capacity to alter the structure at the nanoscale is required for the creation of a new generation of catalysts with excellent catalytic performance. Controlling the metal distribution in bimetallic nanocatalysts, in particular, is crucial to increasing their catalytic activity. The long-term goal of this research is to apply the knowledge gained in the synthesis of bimetallic nanoparticles in microemulsions. Only by analysing the parameters impacting metal sequence can such a difficult goal be attained. We created a computer simulation model for the one-step production of bimetallic nanoparticles in microemulsions to achieve this goal. Under various experimental settings, the model predicts the metal distribution in bimetallic nanocatalysts. From a mechanistic standpoint, Au/Pt and Au/Ag nanostructures are investigated and addressed. The findings may be applied to other bimetallic combinations with comparable standard reduction potential discrepancies. It was demonstrated that adjusting the initial reactant concentration inside micelles may readily change both surface and interior compositions at nanoscale precision. The confinement of reactants inside micelles has a significant impact on the reaction rates of metal precursors, according to a kinetic investigation. As a result of the greater concentration, the final nanocatalyst has a more mixed core and a more defined exterior.

Author(s) Details:

Concha Tojo,
Physical Chemistry Department, Universidade de Vigo, E-36310, Vigo, Spain.

David Buceta,
Laboratorio de Magnetismo y Nanotecnología, University of Santiago de Compostela, E-15782, Santiago de Compostela, Spain.

M. Arturo López-Quintela,
Laboratorio de Magnetismo y Nanotecnología, University of Santiago de Compostela, E-15782, Santiago de Compostela, Spain.

Please see the link here: https://stm.bookpi.org/RACMS-V1/article/view/7106