Platinum-Maghemite Core−Shell Nanoparticles Using a Sequential Synthesis

Abstract

Pt@Fe 2 O 3 core−shell nanoparticles have been made using a sequential synthetic method. Platinum nanoparticles were synthesized via reduction of platinum acetylacetonate in octyl ether, and layers of iron oxide were subsequently deposited on the surface of Pt nanoparticles through thermal decomposition of iron pentacarbonyl. The core−shell nanoparticles were characterized by powder X-ray diffraction, high-resolution transmission electron microscopy, and X-ray photoemission spectroscopy. Thickness of the shell can be controlled by changing concentrations of the reactants and the reaction conditions. These Pt@Fe 2 O 3 core−shell nanoparticles could have potential applications in catalysis and as precursors for making property-tunable magnetic nanoparticles, thin films, and nanocomposites.

Structural Evolution of Plasma-Sputtered Core–Shell Nanoparticles for Catalytic Combustion of Methane

“…Various preparation techniques, such as sequential synthesis and arc discharge, have been proposed for preparation of core-shell structural catalysts [10][11][12][13] . Recently, plasma sputtering deposition has been studied extensively because the technique is feasible and no post-treatment is needed 14,15 .…”

PtAu bimetallic heteronanostructures made by post-synthesis modification of Pt-on-Au nanoparticles

“…We and others have previously demonstrated that the sequential synthesis of core-shell nanoparticles from molecular precursors is readily achievable [13,14], as heterogeneous nucleation and growth are often favored thermodynamically [15]. The advantage of the sequential method is its ability to deposit one component at a time.…”

Co-Assembly of Nanoparticles in Evaporating Aerosol Droplets: Preparation of Nanoporous Pt/TiO2Composite Particles

“…Therefore, a great deal of work has been done in preparing new types of Pt nanomaterials such as shape controlled nanoparticles (Ahmadi et al 1996;Song et al 2004;Lee et al 2008;Peng and Yang 2009;Zhou et al 2009) and supported Pt nanoparticles (Teng et al 2003;Chupas et al 2007;Alonso et al 2008;Joo et al 2009;Shanmugam and Gedanken 2009a), motivated by the need for high catalytic activity. Reducing the consumption of Pt without sacrificing its catalytic performance is an important subject of research due to its high value and limited supply.…”