Table 2.

TOF of various catalysts.

Catalysts	Active Species	TOF (mol-H2 min−1 mol-Active Species−1)	Ref.
Hollow Ni–Pt spheres	Ni-Pt bimetal	19.2	[111]
Hollow SiO2–Ni spheres	Ni	3.8	[114]
Hollow SiO2–Al2O3 spheres	SiO2–Al2O3	0.01	[119]
Co nanowire	Co	0.9	[120]