Successfully synthesized PVP stabilized Pt NPs from 1.4 to 4.8 nm. Two new bands at 2021 cm−1 and 1994 cm−1 were observed in the FTIR spectra of adsorbed 12CO on Pt NPs which are assigned to the edge and corner sites at Pt surface respectively.

Poly(N-vinyl-2-pyrrolidone) (PVP)-stabilized iridium nanoparticles (Ir NPs) showed high chemoselectivity for hydrogenation of nitroaromatics having –CHO, >C=O, –CN, and –Cl functional groups to afford the corresponding aniline compounds under atmospheric hydrogen at room temperature in aqueous–organic biphasic medium.

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