Study of the Behavior of Titanium Alloys as the Cathode for Photovoltaic Hydrogen Production
Table 4
Designations and the associated parameters of the cyclic hydrogenation-solution treatments.
Process designations
The associated processing parameters
H
Specimens hydrogenated at 5 mA/cm2 for 30 h in 1 N H2SO4 (aq) by adding 0.1 g/L As2O3, followed by a solution heat treatment at 300°C for 2 h and then air cooled to room temperature
H3
Specimens processed three cycles according to H and then followed by a further hydrogenation at 5 mA/cm2 for 30 h in 1 N H2SO4 (aq) by adding 0.1 g/L As2O3
I
Specimens hydrogenated at 5 mA/cm2 for 10 h in 1 N H2SO4 (aq) by adding 0.1 g/L As2O3, followed by a solution heat treatment at 300°C for 2 h and then air cooled to room temperature
I3
Specimens processed three cycles according to I and then followed by a further hydrogenation at 5 mA/cm2 for 10 h in 1 N H2SO4 (aq) by adding 0.1 g/L As2O3
OCH3
β solution treated CP-Ti specimens ground by emery paper to 1000 mesh and then treated with H3 process
OBI3
β solution treated Ti-153 specimens ground by emery paper to 1000 mesh and then treated with I3 process
