Preparation of Pt-skin PtRhNi Nanoframes Decorated with Small SnO Nanoparticles as an Efficient Catalyst for Ethanol Oxidation Reaction.

Pt-based nanoframes are one of the most promising catalysts for ethanol oxidation reaction in direct ethanol fuel cells. It is important to understand the mechanisms responsible for creating these hollow nanoframe-based catalysts. Herein, for the first time, Pt-skin PtRhNi rhombic dodecahedral nanoframes were decorated with small SnO nanoparticles and were used as an efficient catalyst for the ethanol oxidation reaction.

Conversion of bimetallic PtNi nanopolyhedra to ternary PtNiSn nanoframes by galvanic replacement reaction.

Hollow multimetallic PtNiSn nanoparticles (NPs) were formed from solid Ni-core/Pt-frame NPs by the galvanic replacement reaction (GRR) of Ni by Sn. The GRR was performed by adding SnCl4·5H2O dissolved in ethylene glycol into the PtNi3 NPs containing suspension. The reaction yielded nanoframes with a hollow interior, having Pt-rich edges covered with a thin, incomplete Sn layer.

Design and assembly of ternary Pt/Re/SnO NPs by controlling the zeta potential of individual Pt, Re, and SnO NPs.

In this study Pt, Re, and SnO nanoparticles (NPs) were combined in a controlled manner into binary and ternary combinations for a possible application for ethanol oxidation. For this purpose, zeta potentials as a function of the pH of the individual NPs solutions were measured. In order to successfully combine the NPs into Pt/SnO and Re/SnO NPs, the solutions were mixed together at a pH guaranteeing opposite zeta potentials of the metal and oxide NPs.

Single-step synthesis of Er and Yb ions doped molybdate/GdO core-shell nanoparticles for biomedical imaging.

Nanostructures as color-tunable luminescent markers have become major, promising tools for bioimaging and biosensing. In this paper separated molybdate/GdO doped rare earth ions (erbium, Er and ytterbium, Yb) core-shell nanoparticles (NPs), were fabricated by a one-step homogeneous precipitation process. Emission properties were studied by cathodo- and photoluminescence.