▎ 摘　　要

The present work reports the synthesis of a Pt-modified NiO-Al2O3 nanocomposite derived from graphene-supported layered double hydroxide (Pt-NiO/G) and demonstrates its catalytic activity. The resulting Pt-NiO/G nanocomposite was characterized by FT-IR, XRD, FE-SEM, TEM and XPS techniques and used for catalytic reduction of p-nitrophenol (P-NP) to p-aminophenol (P-AP). The influence of graphene on catalytic activity was comparatively considered by preparation of Pt-NiO nanoparticles derived from layered double hydroxide. The superior catalytic performance of Pt-NiO/G was ascribed to the synergistic effect between Pt and NiO. Furthermore, reduction of P-NP was considered to follow a pseudo-first-order kinetic and a Langmuir-Hinshelwood model was suggested for the mechanism of reduction reaction.