The direct oxidation of lactate to pyruvate is an important process for catalytic conversion of biomass, although low selectivity and harsh reaction conditions limit its potential for industrial application. In this study, catalytic oxidation of ethyl lactate (EL) to ethyl pyruvate (EP) over OMS-2-based materials was conducted using O₂ as the green oxidant. A 78 % EL conversion and 95 % EP selectivity were obtained in CH₃NO₂ at 50 °C over a Na-doped OMS-2 catalyst. The conversion and selectivity of the reaction were affected by the dopant loading of catalyst and reaction temperature. Kinetic study found that original OMS-2 showed slightly higher initial reaction rate than modified OMS-2, and the latter gave higher EP yield due to its more labile lattice oxygen. Characterization of the catalyst indicates that the enhancement of surface oxygen vacancies and reducibility from the Na-doping might contribute to the superior catalytic activity.

乳酸直接氧化为丙酮酸是生物质催化转化的重要过程，尽管低选择性和苛刻的反应条件限制了其工业应用潜力。在这项研究中，使用O ₂作为绿色氧化剂，在基于OMS-2的材料上将乳酸乙酯（EL）催化氧化为丙酮酸乙酯（EP）。在CH ₃ NO ₂中获得78％的EL转化率和95％的EP选择性Na掺杂的OMS-2催化剂在50°C下加热。反应的转化率和选择性受催化剂的掺杂量和反应温度的影响。动力学研究发现，原始OMS-2的初始反应速率略高于修饰的OMS-2，而后者由于其晶格氧更不稳定而具有更高的EP收率。催化剂的表征表明，表面氧空位的增加和来自Na掺杂的还原性可能有助于优异的催化活性。