Comparison of the performance with other reported catalysts.

Catalyst	NaBH4/4-NP/catalyst mol mol−1/1 mg	K (S−1)	Ref.
Fe3O4/SiO2@Ag	6.1 × 10−4/3.9 × 10−7/1	0.0092	30
Au/PMMA	5 × 10−6/2.5 × 10−8/1	0.0055	31
Ag2S NPs/RGO	5 × 10−5/6 × 10−8/1	0.0072	33
Fe3O4@SiO2–Au@mSiO2	6.7 × 10−5/1.7 × 10−7/1	0.0058	34
Fe3O4/PDA/Ag	6.7 × 10−5/1 × 10−7/1	0.0170	This work