Hydrogenation of o-chloronitrobenzene to o-chloroaniline over a Pt/γ-Fe2O3 catalyst under ambient conditions

Abstract

Supported Pt nanocatalysts with controlled particle size and size distribution were prepared by immobilizing Pt colloids on different iron oxide supports (γ-Fe₂O₃, Fe₃O₄, Fe₂O₃) via physical adsorption. These catalysts were used to catalyze the liquid phase hydrogenation of o-chloronitrobenzene (o-CNB) to o-chloroaniline (o-CAN) under mild reaction conditions (298 K, 0.1 MPa). The Pt/γ-Fe₂O₃ exhibited higher catalytic selectivity and activity than other similar works (selectivity = 99.9%, activity = 0.20 mol_o-CNB/(mol_Pt s)). The stability of the Pt/γ-Fe₂O₃ was investigated, and the result showed that higher drying temperature could increase the stability of the catalyst.