Catalyst	Synthesis Method	Test Parameters	Observations		H₂ %	Ref.
Catalyst	Synthesis Method	Test Parameters	Achievements	Limitations	H₂ %	Ref.
Co & La supported Zn, Al-Htlc	Co-precipitation followed by calcination at 600˚C for 3 h	400˚C - 600˚C & atmospheric pressure	Better EtOH conversion, high H₂ selectivity, and good catalyst stability	EtOH conversion decreased at a lower temperature	75.1	[32]
NiCo-MgAl mixed oxide prepared from Htlc	Ultrasound or microwave radiation assisted co-precipitation followed by thermal decomposition at 500˚C for 16 h	550˚C	Ultrasound or microwave treatment reduced catalyst synthesis time and increased reducibility and basicity of the catalyst	Increase in basicity decreased H₂ yield due to the formation of unwanted byproducts	77	[141]
Co-Mg-Al	Ultrasound-assisted co-precipitation followed by calcination at 600˚C for 8 h	600˚C & atmospheric pressure	Catalysts with 10% to 15% Co exhibited the best hydrogen yield due to good dispersion of active phase, large surface area and non-agglomeration of the catalyst	Co concentrations less than 10% promotes unwanted product formation and rapid catalyst deactivation	-	[142]
K doped Co/Mg/Al-Htlc	Co-precipitation for Htlc precursor and wet impregnation for K doping followed by calcination at 550˚C for 4 h	400-600˚C & 1 - 18 bar pressure	K doped Co-Htlc catalyst exhibited good stability and no C accumulation happened during the catalytic operation	Staged membrane reactor exhibited lower H₂ yields because of the H₂ removal from the reaction medium	80	[143]
Ni-Mg/Al-Htlc	Co-precipitation and then calcination for 4 h at 500˚C in air	200˚C - 650˚C	In dilute condition (3% EtOH) catalyst reduced at 450˚C with H₂ provided completeEtOH conversion and CO free H₂ production	At higher temperatures, ethanol conversion decreased and amount of CO in the product stream increased	76	[144]
Shell core La-Ni(Mg-AL)O₃ at Mg-Al	Co-precipitation followed by calcination at 700˚C - 900˚C for 6 h	700˚C & Atmospheric pressure	The developed shell-core catalyst at temperature ≥ 700˚C showed good stability and high activity during EtOH steam reforming	Catalyst calcined at high temperature (900˚C) caused the spinel phase and coke formation during the reaction	4.0 mol/mol Et-OH	[145]