TABLE 1.

Various Ni-based metal catalysts used for hydrogen production via POM method.

Metal	Support	Methane conversion (%)	Catalyst preparation method	H2/CO	References
Rh-Ni	Al2O3	∼90	Wet impregnation and solid-state reaction	∼2	Alvarez-Galvan et al. (2019)
Rh-Ni	CeO2	∼80	Wet impregnation and solid-state reaction	∼2	Alvarez-Galvan et al. (2019)
Rh-Ni	La2O3	∼50	Wet impregnation and solid-state reaction	∼2	Alvarez-Galvan et al. (2019)
Rh-Ni	MgO	∼50	Wet impregnation and solid-state reaction	∼2	Alvarez-Galvan et al. (2019)
Rh-Ni	ZrO2	∼50	Wet impregnation and solid-state reaction	∼2	Alvarez-Galvan et al. (2019)
Ni	Al2O3 and ZrO2	90	Wet-impregnation method	2	Fakeeha et al. (2020)