Table 1.

Hydrogen adsorption energy for different models

Ni-TiO 2	O 2C	O 3C-1	O 3C-2	Ni 5C	Ni 6C	Ti 5C	Ti 6C
ΔEads	−4.73	−3.48	−1.22	−1.77	−3.87	−3.88	−3.88