Pd nanoparticles deposited on metal-organic framework of MIL-53(AI): An active catalyst for CO oxidation

Abstract

Pd nanoparticles (NPs) supported on a metal-organic framework (MOF), MIL-53(Al) (MIL: Materials of Institut Lavoisier), were prepared using the incipient wetness impregnation method. The structures of the synthesized Pd/MIL-53(Al) catalysts were determined using X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The same peaks were observed in the XRD patterns of Pd/MIL-53(Al) before and after the catalytic reaction, confirming that the integrity of the MIL-53(Al) support was maintained. The TEM results indicated that the crystalline porous structure of MIL-53(Al) favored the formation of highly dispersed Pd NPs of average size 2.21 nm. The heterogeneous catalytic composite materials exhibited high activities for CO oxidation, with full conversion at 115 °C. The catalytic activity and structure of Pd/MIL-53(Al) were stable after several reaction runs. © Editorial office of Acta Physico-Chimica Sinica.