Nanomaterials that exhibit enzyme-like activity (nanozymes) have attracted significant attention due to their potential for applications in analytical tests and in the biological field. In this study, an enzyme-like nanomaterial is developed by coupling Pt nanoparticles with WO.sub.2.72 (Pt/WO.sub.2.72). The resultant nanocomposite nanomaterial exhibits peroxidase activity and catalase activity. Moreover, owing to the presence of W.sup.6+ and W.sup.5+ in WO.sub.2.72, Pt/WO.sub.2.72 nanoplates demonstrate promise as scavengers of hydroxyl radicals. The Pt/WO.sub.2.72 composite nanoplates exhibit excellent peroxidase-like activity for the sensitive colorimetric detection of H.sub.2O.sub.2 and blood glucose. These Pt/WO.sub.2.72 nanoplates are thought to be a promising tool for broad potential applications in biomedicine, biotechnology, and environmental chemistry.