Technology

Fast time response

Figure 1. H2 evolution and CO stripping experiments using a 5 mm polycrystalline Pt electrode in 1M HClO4. Potential sweeps are carried out at 20 mV/s. a) Different signals from the mass spectrometer corresponding to H2 (m/z=2), He (m/z=4), CO (m/z=28) and CO2 (m/z=44) along with the potential and current density as a function of time. b) MS signal as a function of applied voltage and CVs corresponding to the colored sweeps in a).

The system can measure composition changes of volatile species with a time resolution down to 0.1 seconds. This allows to effortlessly produce EC-MS plots, as shown in Figure 1, with EC and MS signal plotted against common time (a) and against applied potential (b) (Read more on the experiment in Example EC-MS section). The software integration takes care of synchronization, so there is no need to manually (and somewhat inaccurately) record the time-zero when the EC technique is started with respect to the MS signal. For more information on software integration, see Software section.

D. B. Trimarco et al., Enabling real-time detection of electrochemical desorption phenomena with sub-monolayer sensitivity. Electrochim. Acta. 268, 520–530 (2018).