We report Pt-Pd nanoparticles synthesized by means of a polyol process with glycerol as a reducing agent. The Pt-Pd nanoparticles exhibit dominantly exposed {111} facets in octahedral shape with complete alloy formation between Pt and Pd. Furthermore, the octahedral Pt-Pd alloy catalysts show improved catalytic activity and stability in methanol electrooxidation.

a r t i c l e i n f o Keywords: Supported Pd nanoparticles Particle–substrate interaction Density functional calculation Molecule adsorption on particle Strontium titanate substrate Interactions of Pd atoms, films and nanoparticles with a SrTiO 3 (001) substrate are studied via first principles Density Functional Theory. Effects of the substrate upon structural, electronic and chemical properti...

Coadsorbed organic species including thiolates can promote direct synthesis of hydrogen peroxide from H2 and O2 over Pd particles. Here, density functional theory based kinetic modeling, augmented with activity measurements vibrational spectroscopy are used to provide atomistic understanding H2O2 formation alkylthiolate(RS) Pd. We find that the RS oxidized during reaction conditions yielding RS...

In this work, we studied the mechanical and thermal stability of ~100 nm Pd thin films magnetron sputter deposited on a bare oxidized Si(100) wafer, sputtered Titanium (Ti) intermediate layer, spin-coated Polyimide (PI) layer. The dependence film morphology film-substrate interaction was investigated. It shown that columnar with elongated voids at part grain boundaries is resistant to embrittle...

We present an original two-step method for the deposition via precipitation of Pd nanoparticles into macroporous silicon. The method consists in immersing a macroporous silicon sample in a PdCl2/DMSO solution and then in annealing the sample at a high temperature. The impact of composition and concentration of the solution and annealing time on the nanoparticle characteristics is investigated. ...

The ligand substitution reaction, Pd L(3,2,1)-edge and S K-edge x-ray absorption fine structure (XAFS), XAFS simulations, and valence-band and core-level x-ray photoelectron spectroscopy (XPS) have been used to systematically study the surface chemical and electronic properties of wet-chemically prepared Pd nanoparticles of varied size, molecular capping, and metal composition. It was found tha...

The development of green synthesis methods for supported noble metal catalysts remains important challenges to improve their sustainability. Here we first synthesized carbon-supported Pd catalysts in a green Leidenfrost droplet reactor without reducing agents, high-temperature calcination and reduction procedures. When the aqueous solution containing Pd nitrate precursor, carbon support, and wa...

Synthesized [email protected] nanoparticles (NPs) were fully characterized by spectroscopic techniques and (scanning) transmission electron microscopy to resolve the presence of a Fe(OH)2-like phase. The different phases detected in core–shell nanostructure these NPs corroborated Mössbauer X-ray photoelectron spectroscopies. Metallic iron (Fe0), ferrous (FeII) hydroxide, magnetite (FeIII2FeIIO4...

A facile method has been developed to synthesize Au/Pd core-shell nanoparticles via galvanic replacement of Cu by Pd on hollow Au nanospheres. The unique nanoparticles were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, ultraviolet-visible spectroscopy, and electrochemical measurements. When the concentration of the Au solution was decrea...

In this work new transparent conductive films that had a sandwich structure composed of ITO/metal/ITO multilayer films were prepared by reactive thermal evaporation technique on glass substrates without intentional substrate heating. Ag, Au and Cu thin films have been used as intermediate metal layer. The thickness of each layer in the ITO/metal/ITO films was kept constant at 50nm/10nm/40nm. Th...