Peak oxygen production

Solid Cu2OCl2 products formed by the ultrasonic nozzle were subsequently heated from room temperature to 700°C to investigate its decomposition behavior as a function of temperature. While several mass numbers were monitored as a function of time and reaction temperature, the oxygen peak at mass number 32 is shown in Figure 6. The peak area was determined and converted to an amount of oxygen via a calibration curve. As can be seen the oxygen signal started near 400°C and ended near 550°C. The calibration showed that the peak area corresponded to 100% of the theoretical amount. 

EDS study at location B, at the bottom of a pit showed that location was mainly composed of Cu and Ni with a small amount of Fe, which could be attributed to contamination since Fe was not detected in some other pits. The EDS result indicates no denickelification inside the pit since both Ni and Cu were found, and the crystals appear to be compact with no evidence of any copper crystal deposit or selective nickel dissolution leaving a porous structure. It should also be noted that there was no corrosion product at the bottom of the pit, and there was clear evidence of copper redeposit at the edge of the pit, as indicated in EDS of the copper and oxygen peaks. 

Temperature programmed reaction of 2% O2 in He (ref. 1) with used catalysts (after 3 hours of reaction) resulted in consumption of oxygen without production of carbon oxides between room temperature and 50 C. At SO C, CO2 slowly began to evolve from the unpromoted catalysts (observed as flat peaks). ITic hydrogenated residues responsible for the flat CO2 peaks were still active during simple hydrogcnolysis at temperatures at which the selectivity... 

The use of larger particles in the cyclotron, for example carbon, nitrogen or oxygen ions, enabled elements of several units of atomic number beyond uranium to be synthesised. Einsteinium and fermium were obtained by this method and separated by ion-exchange. and indeed first identified by the appearance of their concentration peaks on the elution graph at the places expected for atomic numbers 99 and 100. The concentrations available when this was done were measured not in gcm but in atoms cm. The same elements became available in greater quantity when the first hydrogen bomb was exploded, when they were found in the fission products. Element 101, mendelevium, was made by a-particle bombardment of einsteinium, and nobelium (102) by fusion of curium and the carbon-13 isotope. 

A mixture of LiOH and EMD is heated at 420 °C for 2-3 h in order to allow molten LiOH to penetrate into the pores of the EMD. The mixture is then heated from 650 to 800 °C to produce LiMn204. The amount of LiOH and EMD in the mixture must be stoichiometric (LiOH Mn02 = 1 2). The product, LiMn204, is usually tested by cyclic voltammetry (Fig. 22) a good LiMn204does not have peaks at a and b.(peak a (3.3 V) would be due to the oxygen deficiency and peak b (4.5 V) to replacement of the Li ion sites by Mn4+... 

In order to interpret these observations, results from model studies need to be examined. When Ni(CNBut) is mulled in oxygenated Nujol, the infrared spectrum of the product shows two sharp bands at 2200 and 2180 cm-- - and an additional peak at 900 cm-l (19). This... 

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