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One pot ligand exchange method for a highly stable Au–SBA-15 catalyst and its room temperature CO oxidation
- Soni, Yogita, Kavya, I., Ajithkumar, T. G., Vinod, C. P.
- Chemical communications 2018 v.54 no.87 pp. 12412-12415
- ambient temperature, ammonium chloride, carbon monoxide, catalysts, gold, ligands, nanogold, oxidation, silica
- A modified deposition precipitation (DP) method has been developed to address a fundamental issue of supporting well dispersed Au nanoparticles on silica. Ammonium chloride (NH₄Cl) plays an important role in in situ modifying the gold precursor (HAuCl₄·3H₂O) solution allowing facile deposition of gold NPs in the channels of SBA-15. The Au–SBA-15 catalyst (2.8 wt%) synthesized by this procedure showed 100% conversion for CO oxidation at room temperature with excellent stability at room temperature and high temperature.