Tetrahydrofurane solution, transmissivity

Figure 3.107. Transmissivity of a solution of 94a in tetrahydrofurane (5.1 x 10 2 M/L, L — 1 cm, d — 0.051 M/L. ji — 0.8 ctn/GW) as a function of the input laser beam intensity (o) experimental data, solid line is calculated using Eq. (86) and a fitting parameter of ji — 0.8 cm/GW. (From Ref. [529] with permission of the American Institute of Physics.)...

Recently, taking advantage of the very narrow size distribution of the metal particles obtained, microemulsion has been used to prepare electrocatalysts for polymer electrolyte membrane fuel cells (PEMFCs) Catalysts containing 40 % Pt Ru (1 1) and 40% Pt Pd (1 1) on charcoal were prepared by mixing aqueous solutions of chloroplatinic acid, ruthenium chloride and palladium chloride with Berol 050 as surfactant in iso-octane. Reduction of the metal salts was complete after addition of hydrazine. In order to support the particles, the microemulsion was destabilised with tetrahydrofurane in the presence of charcoal. Both isolated particles in the range of 2-5 nm and aggregates of about 20 nm were detected by transmission electron microscopy. The electrochemical performance of membrane electrode assemblies, MEAs, prepared using this catalyst was comparable to that of the MEAs prepared with a commercial catalyst. 

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