Table 1. Typical Cycle of Hydrogen Adsorption.
temperature (°C) | time (min) | flow of H2 (sccm) | flow of Ar (sccm) | purpose |
---|---|---|---|---|
60 | 60 | 5 | 45 | saturation with H2 |
60 | 120 | 0 | 51.2 | purging the lines |
60–460 | 80 | 0 | 51.2 | temperature-programmed desorption |
460 | 20 | 0 | 51.2 | elimination of any H2 residue in the sample |