Since the assignment of the a state as coadsorbed CO and 0 causes some logical difficulties in correlating with the TPD data (developed in the discussion section), it appears wise to [Pg.87]

The TPD data analytical methods Introduced In Section 2.2.3 were used to calculate the desorption parameters of CO desorption for Che COj/K/AgClll). The calculation of parameters was limited Co peak a of COj K(fl—l/3)/Ag(lll) dosed with saturation coverage of COj. [Pg.91]

Desorption order was first determined using the Order Plot Method. Then Che order parameter obtained was substituted Into equation 2.12, which then was used to fit the experimencal TPD peak. The fitting program was written In ASYST. The best fit was obtained by adjusting the desorption energy E. Finally the pre-factor was determined using equation 2.4. [Pg.91]

A half-order desorption process is consistent with a kinetic model in which desorption occurs from the edges of two-dimensional islands. Half-order desorption processes have been [Pg.91]

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