@article{,
    author = {Akca, Sefa; Lüders, Laura von; Düsberg, Georg; Elsaesser, Wolfgang; Nicoloso, Norbert; Riedel, Ralf},
    title = {Time-Resolved MIR Reflection−Absorption Spectroscopy of N<sub>2</sub>O, CO, and CH<sub>4</sub> Adsorption on Graphene<sub><sub></sub></sub>},
    editor = {},
    booktitle = {},
    series = {},
    journal = {The Journal of Physical Chemistry},
    address = {},
    publisher = {},
    edition = {},
    year = {2023},
    isbn = {},
    volume = {127},
    number =  {10},
    pages = {4998-5003},
    url = {https://doi.org/10.1021/acs.jpcc.2c07277},
    doi = {10.1021/acs.jpcc.2c07277},
    keywords = {},
    abstract = {The time- and temperature-dependent adsorption on N<sub>2</sub>O, CO, and CH<sub>4</sub> on
 CVD-grown graphene has been investigated by MIR reflection−absorption spectroscopy to
 gain information about the adsorption kinetics, notably the rate constants k and activation
 energies E<sub>a</sub> on the adsorption step. The gas adsorption is followed by determining the change
 of the reflected beam intensity with time by taking difference spectra, i.e., subtracting the
 baseline signal (reflectivity of graphene at the respective gas excitation line) from the
 measurement with added gas. The experiments yield adsorption activation energies E<sub>a</sub> of
 −19.6 ± 1.1 (N<sub>2</sub>O), −12.1 ± 0.2 (CO), and −9.5 ± 1.7 kJ/mol (CH<sub>4</sub>). The obtained E<sub>a</sub>
 values are in excellent agreement with the literature results from theory, thereby confrming
 these studies. The E<sub>a</sub> values indicate physisorption, i.e., no strong bonding of the gas
 molecules to graphene. The analyzed adsorption rate constants k are reported for the frst
 time and are on the order of 10<sup>11</sup> to 10<sup>12</sup> molecules·s<sup>−1</sup>·cm<sup>−2</sup> with N<sub>2</sub>O showing the highest
 value and CH<sub>4</sub> the lowest value. The adsorption rate constants follow the series N<sub>2</sub>O > CO
 > CH<sub>4</sub>, in line with the charge transfer abilities of the molecules. This work can be easily extended to kinetic studies of other gases
 hazardous to the environment and adsorption studies with other 2D materials using versatile MIR reflection−absorption
 spectroscopy.},
    note = {},
    institution = {Universität der Bundeswehr München, Fakultät für Elektrotechnik und Informationstechnik, EIT 2 - Institut für Physik, Professur: Düsberg, Georg},
    
    
}