▎ 摘　　要

NOVELTY - Preparing supported noble metal catalyst by using low-temperature plasma modiied graphene comprises (i) placing graphene in a petri dish and placing it in low-temperature plasma processing device, (ii) adjusting parameters of device and performing plasma treatment on graphene to obtain modified graphene, (iii) measuring modified graphene and dispersing in deionized water, and uniformly stirring to obtain modified graphene dispersion, (iv) adding precious metal chloride aqueous solution to modified graphene dispersion, uniformly stirring, and adding sodium borohydride (NaBH4) aqueous solution dropwise under vigorous stirring to reduce it at room temperature, and (v) after completing reduction at room temperature, separating by suction filtration, washing with deionized water, and drying to obtain plasma-modified graphene-supported noble metal catalyst. USE - The method is useful in preparing supported noble metal catalyst for selectively hydrogenating of alpha , beta -unsaturated aldehydes in high temperature aqueous phase (claimed). ADVANTAGE - The method: is simple, environmentally friendly, fast in processing speed, and provides scientific basis and important ideas for constructing an economical, green and sustainable catalytic reaction system; adopts controllable modification by low-temperature plasma, which improves dispersibility of graphene in water, and improves dispersibility of metal nanoparticles on its surface, and finally achieves goal of improving aqueous phase catalytic hydrogenation. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use of modified graphene-supported noble metal catalyst for selectively hydrogenating of alpha , beta -unsaturated aldehydes in high temperature aqueous phase.