In this paper, the performance of monometallic and bimetallic (Au, Pt, Ag, Pd) catalysts supported on a basic alumina in the partial oxidation of glycerol in the liquid phase are compared. A clear synergetic effect between metals is observed, especially when Au and Pt, Au and Pd, as well as Ag and Pt are associated. These three catalysts, characterized by relatively small mean particle size (i.e., 4.44 ± 2.18 nm for AuPt, 6.42 ± 3.31 nm for AuPd, and 6.91 ± 3.97 nm for AgPt), enable complete glycerol (GLY) conversion after 4 h of reaction at room temperature, under atmospheric pressure (200 mL of a 0.3 m GLY solution, 0.5 g of catalyst, NaOH/GLY = 4 mol mol⁻¹, 1500 rpm, 650 mL O₂ min⁻¹). Moreover, it is possible to achieve more than 80% GLY conversion after 4 h of reaction at room temperature under atmospheric pressure with air bubbling (650 mL air min⁻¹) as an oxidation atmosphere. This unpreceded high performance in the glycerol partial oxidation reaction under such mild conditions pave the way to the possibility of industrial exploitation of this promising catalytic system.

中文翻译：

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在支持的双金属催化剂上通过液相甘油部分氧化的前沿

本文比较了碱性氧化铝上负载的单金属和双金属（Au，Pt，Ag，Pd）催化剂在甘油在液相中的部分氧化性能。观察到金属之间明显的协同作用，特别是当金和铂，金和钯以及银和铂结合时。这三种催化剂的特征在于相对较小的平均粒径（例如，AuPt为4.44±2.18 nm，AuPd为6.42±3.31 nm，AgPt为6.91±3.97 nm），使催化剂在30℃反应4小时后即可完成甘油（GLY）转化。室温，在大气压下（200毫升的0.3米GLY溶液，0.5克催化剂，氢氧化钠/ GLY = 4摩尔摩尔^-1，1500转，650毫升邻₂分钟^-1）。此外，在大气压下于室温下以空气鼓泡（650mL air min ^-1）作为氧化气氛，反应4h后，可以实现80％以上的GLY转化率。在这种温和的条件下，甘油部分氧化反应中的这种前所未有的高性能为这种有前途的催化系统的工业开发铺平了道路。