Nanoparticulate gold

G. Schmid, and B. Corain, Nanoparticulated gold syntheses, structures, electronics, and reactivities, Eur. J. Inorg. Chem. (17), 3081-3098 (2003). 

Fig. 1. Typical shapes of nanoparticulate gold formed from these experiments.

Schmid G, Corain B (2003) Nanoparticulated gold Syntheses, structures, electronics, and reactivities. Fur J Inorg Chem 3081-3098... 

For gold to be an active catalyst, use of a careful preparation procedure is crucial in order to obtain it as nanoparticles well dispersed on the oxide support. In this section we describe the methods devised for the preparation of these nanoparticulate gold catalysts. Catalysts are thought to be most active in the 2- to 5-nm gold particle range but both smaller and larger particles have also been shown to have activity and may play a significant role. 

Nanoparticulate gold supported on oxides (SiOa, AI2O3, TiOa, ZnO, ZrOa and FeaOs) has been used for the selective catal3dic hydrogenation of several organics such as a, -unsaturated aldehydes [98,99,249,433-440], a, 3-unsaturated ketones [58, 326, 441] and unsaturated hydrocarbons [18, 437, 442-445]. 

It has been reported that cross-metathesis reactions can be performed on olefins using nanoparticulate gold catalysts [579]. The introduction of various organic functional groups onto organic thin films is a first step in their application in sensors, catalysis and nanotechnology in general. 

Haruta, M., 2004. Nanoparticulate gold catalysts for low-temperature CO oxidation. J. New Mat. Electrochem. Syst. 7, 163—172. 

Schmid, G. and Corain, B. Nanoparticulated Gold Syntheses, Structures, Electronics, and Reactivities. Chemlnform,34(44), no-no (2003). 

The third-order nonlinearity of these composites was measured using DFWM. The nanoparticulate gold was found to have nonlinearities in PMMA and poly(phenylmethylsilane) of -1.0 x 10 e.s.u. and -1.5 x 10 e.s.u., respectively. 

Corma A, Navas J, Sabater Ml (2012) Coupling of two multistep catalytic cycles for the one-pot synthesis of propargylamines from alcohols and primary amines on a nanoparticulated gold catalyst. Chem-Eur J 18(44) 14150-14156... 

Prepare a nanoparticulate gold solution, using the Turkevich method as follows ... 

M. Haruta - Nanoparticulate Gold Catalysts for Low Temperature CO Oxidation,... 

It is particularly noteworthy that nanoparticulate gold or gold alloyed with palladium catalyzes selective oxidation reactions such as alkene epoxidation, selective alcohol oxidation, and direct synthesis of hydrogen peroxide by the hydrogenation of molecular oxygen [14]. 

Most of the research carried out on gold catalysis has been done using nanoparticulate gold on oxide or carbon supports. The principal methods for preparing gold catalysts for use in liquid- and... 

Until the recent emergence of nanoparticulate gold as an important catalyst this was generally regarded as a palladium catalyzed reaction but it is now clear that gold also has a significant role to play. There is likely to be a gas- and liquid-phase component to this process, because water is formed as a by-product. 

Nanoparticulate gold on oxide can be used with advantage to catalyze the WGS to produce hydrogen from carbon monoxide and steam [16,90,95] ... 

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