用化学还原及品种媒介生长法制备不同尺寸的金纳米粒子,将其负载在活性炭上获得Au/C催化剂,应用于液相催化氧化乙二醛制备乙醛酸的反应.用TEM表征金粒子的尺寸,研究金纳米粒子尺寸因素对反应速率、产率及选择性等催化性能的影响.结果表明,金纳米催化剂存在着明显的尺寸效应,其中金纳米粒子尺寸在3.5 nm负载形成的1％ Au/C催化剂的催化活性最高.
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