Pt-nanopaiticles

Scheme 4 Pt-Nanopaiticle Catalyzed Hydrosilylation of 1, 2-polybutadiene with D DH...

The influence of deposited Pt nanopaiticles on the interfacial kinetics of silicon has been investigated by combining photocurrent and PMC measurements (Wiinsch et al, 1996). Sohd electrolyte contacts to sihcon have also been studied, and it has been found that the PMC signal follows the same potential dependence as with liquid electrolytes. It has been shown that by electropassivating the sihcon/electrolyte interface the bulk minority-carrier hfetime of silicon wafers can be determined from the PMC plateau in the accumulation region (Schulenberg and Tributsch, 2000). 

Guo S, Dong S, Wang E. Raspberry-like hierarchical Au/Pt nanopaiticle assembling hollow spheres with nanochannels an advanced nanoelectrocatalyst for the oxygen reduction reaction. / Phys Chem C 2009 113(14) 5485-92. 

Fig. 6.7 Core-shell Pd/Pt nanopaiticles stabilized by PVP prepared by simultaneous reduction process...

TON of 3,400 and 7,000 per Ir for hydrogen evolution over an illumination time of 48 h, respectively. These TONs are almost five times as high as the homogeneous control. It is believed that facile electron transfer between the photoreduced Ir-complexes and the Pt nanopaiticles enhances the catalytic performance of the PKS>MOFs over their htmogeneous counterparts. The catalysts can be recycled and reused for at least three times though significant leaching of the iridium complexes was also observed after the 48 h reactimis. 

Nanopaiticles of metals such as Au, Ag, Pd and Pt embedded in exfoliated sheets of aminoclays of the type RgSigMgsOig-(0H>4, where R = CH2CH2NH2 are entirely water soluble. These sheets of the composite come to the organic-aqueous interface on addition of alkane thiols to the aqueous layer. 

Wen Z, Liu J, Li J (2008) Core/Shell Pt/C nanopaiticles embedded in mesoporous carbons a methanol-tolerant cathode catalyst in direct methanol fuel cells. Adv Mater 20 743-747... 

Wu, B.Y., et al. Amperometric glucose biosensor based on multilayer films via layer-by-layer self-assembly of multi-wall carbon nanotubes, gold nanopaiticles and glucose oxidase on the Pt electrode. Biosens. Bioelectron. 22(12), 2854—2860 (2007)... 

Fig. 20.6 Snapshots from molecular dynamics simulations showing the evolution of nanopaiticles exposed to high O contents, water, and acid molecules. Top row shows pure Pt particles and bottom row displays Pt/PtCo/PtaCo particles (a) under vacuum, (b) under 0.5 ML of O and 0.5 ML of water, (c) under 0.6 ML of O and 0.6 ML of water, (d) under 0.75 ML of O and 0.75 ML of water, and (e) under 0.85 ML of O and 0.85 ML of water. In all cases acid molecules were added to the systems in an amount equivalent to have a pH of 3 (adapted from [120])...

Fig. 20.8 Snapshots of the supported Ft (a-d) and Pt/PtCo/PtsCo (e-h) nanopaiticles on C under 0.85 ML of oxygen and water, and pH = 3 taken at the end of the simulation after 1 and 10 reduction-oxidation cycles. All the adsorbates are hidden. Color key platinum (gray), cobalt (purple), carbon (orange) (adapted from [120])...

Shao MH, Sasaki K, Adzic RR (2006) Pt-Fe nanopaiticles as electrocatalysts for oxygen reduction. J Am Chem Soc 128 3526-3527... 

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