Promotion of Au nanoparticles on carbon frameworks for alkali-free aerobic oxidation of benzyl alcohol

We synthesized a series of modified Co-ZIF-67 materials with tunable morphology to support fine Au nanoparticles for the alkali-free aerobic oxidation benzyl alcohol. Structure promotion was performed using Stöber silica as hard template, which subsequently removed by NaOH etching before gold immobilization. The texture structure Au/(Si)C greatly improved increasing surface area and volume. CoO x simultaneously introduced into carbon shell from precursor, consequently facilitated specific Au-support interaction via bimetallic synergy. XRD, XPS, TEM images demonstrated redispersion both well electronic delivery between metals. Analysis chemical composition suggested rich in δ+ abundant lattice oxygen contributed final Au/(Si)C, transformation rate alcohol even an condition. finely dispersed particles showed excellent catalytic performance environment, 89.3% conversion 74.5% benzaldehyde yield under very mild conditions.