Table 2.

Comparison of catalysts for the reduction of 4-NP and azo dyes with literature.

Catalysts	Reduction reaction of	Kapp (min−1)	References
Fe/CC-CH	4-NP	0.2937	This work
Cu/ZnPc-CH	4-NP	0.0513	25
Au/CA	4-NP	0.14–0.20	52
Ag/CB-CH	4-NP	0.1040	26
Ag/CH-FP	4-NP	0.2340	60
Au (10)/TiO2	4-NP	0.17	75
FeNi2 alloy nanostructure	4-NP	0.06	76
Fe/CC-CH	Rh-B	0.3804	This work
Bi2WO6	Rh-B	0.0517	77
Fe/CC-CH	MO	0.1698	This work
Ni/CH-FP	MO	0.116	32
Fe/CC-CH	MB	0.2802	This work
Ag/RGO	MB	0.014	78