Investigation of Pt/SiO2 nanoparticles by solution and single particle mode ICP-MS

Pt/SiO2 nanocomposites (Stöber SiO2 support particles surface coated with 1.6 nm Pt nanoparticles) were analysed utilizing inductively coupled plasma mass spectrometry (ICP-MS) in the solution and single particle modes. Both analytical approaches were optimized and their performance compared in detail. The single particle ICP-MS approach proposed in this study is a novel approach for the determination of the surface concentration nanoparticles in nanocomposites

Determination of the Platinum Concentration of a Pt/Silica Nanocomposite Decorated with Ultra Small Pt Nanoparticles Using Single Particle Inductively Coupled Plasma Mass Spectrometry

The accurate load concentration of ultra small nanoparticles in a Pt/SiO2 nanocomposite is determined by the novel spICP-MS analytical method.</p

Size-dependent H₂ sensing over supported Pt nanoparticles

Abstract Catalyst size affects the overall kinetics and mechanism of almost all heterogeneous chemical reactions. Since the functional sensing materials in resistive chemical sensors are practically the very same nanomaterials as the catalysts in heterogeneous chemistry, a plausible question arises: Is there any effect of the catalyst size on the sensor properties? Our study attempts to give an insight into the problem by analyzing the response and sensitivity of resistive H₂ sensors based on WO₃ nanowire supported Pt nanoparticles having size of 1.5±0.4 nm, 6.2±0.8 nm, 3.7±0.5 nm and 8.3±1.3 nm. The results show that Pt nanoparticles of larger size are more active in H₂ sensing than their smaller counterparts and indicate that the detection mechanism is more complex than just considering the number of surface atoms of the catalyst