TPD spectra Analysis

For a linear heating model, equation 2.4 is differentiated to find the peak temperature Tp at which the desorption rate is a maximum (d S/dt - 0), 

Redhead s first and second order formulas can be easily obtained by substituting n - 1 and 2 into ( 2.5 ) as  

Integrating equation 2.4 with the assumption of linear heating  

Equation 2.12 was used to determine the desorption energy of COj desoirption process on CO2A( l/3)/Ag(lll) by fitting the experimental TPD spectra (see Chapter III for the results). The advantage of this method was that 2.12 does not contain w 

The shortcoming of Redhead s method is chat it is basd on che assumption that all the desorption parameters are coverage-independent. This is often not true in practice. 

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