Comparison of the results of this work with other reported methods in the reduction of 4-NP to 4-AP.

Entry	Catalyst	Time	Ref.
1	GA–Pt NPs	8 h	41
2	Resin–Au NPs	20 min	42
3	NAP–Mg–Au(0)	7 min	43
4	Ni–PVAm/SBA-15	85 min	44
5	Ag NPs/seashell	4.5 min	45
6	Ag/TiO2 nanocomposite	2 min	16
7	PdCu/graphene	1.5 h	46
8	HMMS–NH2–Pd	60 min	47
9	Pd/C	5 min	This work
10	Pd NPs/RGO	20 s	This work