▎ 摘　　要

NOVELTY - Oxidized graphene-noble metal nanoparticle-flaky titanium dioxide catalyst, is claimed. The catalyst has a two-dimensional three-layer structure, the upper and lower layers of the catalyst are (oxidized) graphene and flake titanium dioxide, the middle layer is precious metal nanoparticles, the (oxidized) graphene content in the catalyst is 3-50 wt.% and the content of precious metal nanoparticles is 0.5-5 wt.%. USE - The catalyst is useful in synthesis of hydrogen peroxide with hydrogen and oxygen (claimed). ADVANTAGE - The catalyst has uniform high dispersion characteristics of noble metal nanoparticles, good protection for active sites and simple and convenient preparation, significant improvement in the technology of hydrogen and oxygen direct synthesis of hydrogen peroxide. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: (1) preparing (oxidized) graphene-noble metal nanoparticle-sheet titanium dioxide catalyst, comprising preparing flaky titanium dioxide and (oxidized) graphene by solvothermal and graphite exfoliation methods, utilizing the highly dispersed nature of (oxidized) graphene, carrying precious metal nanoparticles in situ, and finally completing the composite with flake titanium dioxide; and (2) use of (oxidized) graphene-noble metal nanoparticle-sheet titanium dioxide catalyst in the synthesis of hydrogen peroxide with hydrogen and oxygen, comprising dispersing the catalyst in methanol, magnetically stirring for 5-60 minutes, adding sulfuric acid and sodium bromide and placing in the reaction kettle, passing hydrogen and oxygen-nitrogen mixed gas to react, where the total pressure of the mixed gas is 4 MPa and the volume fraction of hydrogen in the mixed gas is 3%, oxygen is 5%, and nitrogen is 92%.