Platinum limit sets

Best and coauthors utilized IR spec-troelectrochemistry to study the electrochemical reduction of 1902 " " in aqueous solutions with KNO3 as supporting electrolyte [60]. The pH of the solutions was set with appropriate quantities of HNO3 and KOH. The optimal pH range for the study was 2.8-3.4, since within this range speciation of U(VI) is limited to U02 + and (U02)2(0H)2 " ", disproportionation of the electrogenerated U(V) species is minimized, and the U—O stretches for U(VI) are observable in the IR spectrum. The results from the study indicate that initial reduction of at a platinum elec-... 

Jackson et al. [26] set miniaturized, battery-powered, high-voltage power supply conditions in NCE for the separation of dopamine and catecholamines with electrochemical detection. The authors varied platinum working electrode voltage from 25 to 200 V/cm for achieving low limits of detection. 

In order to better characterize the system, a further kinetic study was carried out on these two catalysts. Hydrosilylation mechanism has been thoroughly studied in the literature. This is a complex system, since the mechanism depends altogether on the catalyst, the reactants and the experimental conditions. This also explains why for each new reactant, a whole new experimental set-up has to be developed. In most cases already described, the limiting step is the insertion of platinum in the Si-H bond, leading to an apparent rate of reaction independent of double bond concentration ... 

PllC-1 The decomposition of nitric oxide on a heated platinum wire is discussed in Chem. Eng. Set.. 30. 781 (1975). After making some assumptions about the density and the temperatures of the wire and atmosphere, and using a correlation for convective heat transfer, determine if ma.ss transfer limitations are a problem in this reaction. 

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