Assuming that the adlayer tested in that study is characteristic for the surface before the onset of the H2/CO2 multi-pulse experiment (see section 3.2), comparison with the thermal decomposition / desorption behavior of the catalyst after the H2/CO2 multipulse sequence will provide information about the H2/CO2 induced changes of the adlayer. H2 desorption must result from the dehydrogenation of adsorbed species such as surface formates / bicarbonates or CxHy species. Based on the fact that H2 desorption continues also when holding the sample at the maximum temperature of 500 °C, we furthermore expect that H2 desorption is not completed at the end of the experiment, and that additional H2 desorption would appear at higher temperatures.