One-Step Preparation of High-Quality Platinum Nanocatalyst Supported on Graphene Oxide

Abstract

In this paper, we propose and implement an in situ direct reduction reaction of K2PtCl6 precursor under mild reaction conditions using topotaxial reaction and the reducbility of graphene oxide. The reduced product platinum atom clusters are intercalated onto the GO surface, resulting in platinum nanocatalyst. The structure, content, and morphology of Pt/GO composites are studied using X-ray dif-fraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS), among other methods. It has been demonstrated that Pt4+ ions in the K2PtCl6 precursor are reduced to Pt0 atoms under moderate reaction conditions, which are equally distributed across the GO surface in the form of atom clusters with an average particle size of 10 nm. The platinum nanocluster has a conventional face-centered cubic crystal structure, with Pt crystal planes (111), (200), (220), and (311) etc.