Platinum nanopartide

Note Catalyst = platinum nanopartides supported on ACC (Pt/ACC, 5 wt-metal%) 3.0 g. Feed rate of methylcyclohexane = 3.5 mmol/min (superheated liquid-film state). a [Ratio of heat recuperation] = [reaction heat]/([reaction heat] + [evaporation heat]). 

The high dispersity inside the nano-honeycomb matrix and the high surface area of the nanopartides leads to very good electrocatalytic activity. The electrocatalytic activities of nanosized platinum particles for methanol, formic add and formaldehyde electrooxidation have been recently reported [215]. The sensitivity of the catalyst particles has been interpreted in terms of a catalyst ensemble effect but the detailed microscopic behaviour is incomplete. Martin and co-workers [216] have demonstrated the incorporation of catalytic metal nanopartides such as Pt, Ru and Pt/Ru into carbon nanotubes and further used them in the electrocatalysis of oxygen reduction, methanol electrooxidation and gas phase catalysis of hydrocarbons. A related work on the incorporation of platinum nanopartides in carbon nanotubes has recently been reported to show promising electrocatalytic activity for oxygen reduction [217]. 

Chen et al. [19] have reported very active, stable platinum nanopartide catalysts prepared by alcohol reduction of PtCls using poly(N-isopropylacrylamide) previously grafted on PS microspheres as stabilizing polymer. The observed catalytic activity in the hydrogenation of allyl alcohol was more than five times higher than with Pt/C. Moreover, it was possible to recycle the resin-based catalysts for at least six cycles, whereas Pt/C was not recyclable at all. When comparing the catalytic activity of free and heterogeneous colloidal platinum particles, only a small decrease in the reaction rate was observed. 

Influence of the surfece treatment on the deposition of platinum nanopartides on the carbon nanotubes. Advanced Engineering Materials, 8 (1-2),... 

Additives can be used to further stabilize nanopartides in imidazolium based ionic liquids. Stabilization with polyvinylpyrrolidone (PVP) is necessary to obtain stable mono- and bimetallic Pt/Au nanopartides immobilized in [C4MIm ][PF6 ].1971 Also, ionic liquid-like copolymers can be used to stabilize Rhi ] and Pt 199] nanopartides, where [C4MIm+][BF4-] itself can not stabilize the platinum nanopartides sufficiently. 199]... 

Petroski, J.M., Wang, Z.L, Green, T.C. and El-Sayed, M.A. (1998) Kinetically controlled growth and shape formation mechanism of platinum nanopartides. Journal of Physical Chemistry B, 102, 3316. 

Ren, J. and Tilley, R.D. (2007) Shape-controlled growth of platinum nanopartides. Small, 3,1508. 

Rioux, R.M., Song, H., Grass, M., Habas, S., Niesz, K., Hoefelmeyer, J.D., Yang, P. and Somorjai, G.A. (2006) Monodisperse platinum nanopartides of well-defined shape synthesis characterization, catalytic properties and future prospects. Topics in Catalysis, 39,167. 

Polyol synthesis of platinum nanopartides control of morphology with sodium nitrate. Nano Letters, 4, 2367. 

Z. (2006) Controlled growth and shape formation of platinum nanopartides and their electrochemical properties. Electrochimica Acta, 52,1632. 

Morphology of platinum nanopartides protected by poly(N-isopropylaaylamide). Langmuir, 16, 7109. 

A simple solution-phase reduction method for the synthesis of shape-controlled platinum nanopartides. Materials Letters, 59,1567. 

Size-controlled synthesis of colloidal platinum nanopartides and their activity for the electrocatalytic oxidation of carbon monoxide. Journal of Colloid and Interface Science, 287, 159. 

Ghannoum, S., Xin, Y., Jaber, J. and Halaoui, LI. (2003) Self-assembly of polyacrylate-capped platinum nanopartides on a polyelectrolyte surface kinetics of adsorption and effect of ionic strength and deposition protocol. Langmuir, 19, 4804. 

Perez, H., Pradeau, J.P., Albouy, P.A. and Perez-Omil, J. (1999) Synthesis and characterization of functionalized platinum nanopartides. Chemistry of Materials, 11, 3450. 

Lu, G.). and Zangari, G. (2006) Electrodeposition of platinum nanopartides on highly oriented pyrolitic graphite-Part II morphological characterization by atomic force microscopy. Electrochimica Acta, 51, 2531. 

Shape control of platinum nanopartides. Advanced Functional Materials, 17, 2219. 

Effect of catalytic activity on the metallic nanoparticle size distribution electron-transfer reaction between Fe(CN)(5) and thiosulfate ions catalyzed by PVP-platinum nanopartides. Journal of Physical Chemistry B, 107, 12415. 

Konishi, Y., Ohno, K., Saitoh, N., Nomura, T., Nagamine, S., Hishida, H., Takahashi, Y. and Uruga, T. (2007) Bioreductive deposition of platinum nanopartides on the baderium ShewaneUa algae. Journal of Biotechttology, 128(3), 648-53. 

G. (2006) Synthesis of platinum nanopartides by reaction of filamentous cyanobacteria with platinum(IV)[Pg.490]

Li, F., Li, F. Song, J., Song, J., Han, D. L. Niu. (2009). Green synthesis of highly stable platinum nanopartides stabilized by amino-terminated ionic hquid and its electrocatalysts for dioxygen reduction and methanol oxidation, Electrochem. Commun. 11 351-354. 

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