Department of Chemical Engineering and Materials Science, Stevens Institute of Technology, Hoboken, New Jersey, 07030, USA.
Chemistry. 2020 Apr 21;26(23):5174-5179. doi: 10.1002/chem.202000139. Epub 2020 Mar 24.
The development of improved technologies for biomass processing into transportation fuels and industrial chemicals is hindered due to a lack of efficient catalysts for selective oxygen removal. Here we report that platinum nanoparticles decorated with subnanometer molybdenum clusters can efficiently catalyze hydrodeoxygenation of acetic acid, which serves as a model biomass compound. In contrast with monometallic Mo catalysts that are inactive and monometallic Pt catalysts that have low activities and selectivities, bimetallic Pt-Mo catalysts exhibit synergistic effects with high activities and selectivities. The maximum activity occurs at a Pt to Mo molar ratio of three. Although Mo atoms themselves are catalytically inactive, they serve as preferential binding anchors for oxygen atoms while a catalytic transformation proceeds on neighboring surface Pt atoms. Beyond biomass processing, Pt-Mo nanoparticles are promising catalysts for a wide variety of reactions that require a transformation of molecules with an oxygen atom and, more broadly, in other fields of science and technology that require tuning of surface-oxygen interactions.
由于缺乏用于选择性去除氧的高效催化剂，生物质加工成运输燃料和工业化学品的改进技术的发展受到阻碍。在这里，我们报告了负载亚纳米钼团簇的铂纳米颗粒可以有效地催化作为生物质模型化合物的乙酸的加氢脱氧反应。与单金属 Mo 催化剂的无活性和单金属 Pt 催化剂的低活性和选择性相比，双金属 Pt-Mo 催化剂表现出高活性和选择性的协同效应。最大活性出现在 Pt 与 Mo 的摩尔比为三的情况下。尽管 Mo 原子本身没有催化活性，但在相邻的表面 Pt 原子上进行催化转化的同时，它们充当氧原子的优先结合锚。除了生物质加工之外，Pt-Mo 纳米颗粒还是广泛的需要氧原子转化的各种反应以及更广泛的需要调节表面氧相互作用的科学和技术领域的有前途的催化剂。
