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Catalytic Oxidation of Glycerol over Pt Supported on MOF-Derived Carbon Nanosheets

选择性 催化作用 甘油 甘油酸 X射线光电子能谱 化学 碳纤维 过渡金属 纳米颗粒 无机化学 化学工程 材料科学 有机化学 纳米技术 复合数 工程类 复合材料
作者
Yi-Hu Ke,Chunmei Zhu,Jingyun Li,Hai Liu,Hong Yuan
出处
期刊:ACS omega [American Chemical Society]
卷期号:7 (50): 46452-46465 被引量:2
标识
DOI:10.1021/acsomega.2c05155
摘要

A series of nitrogen-doped porous carbon nanosheets (NPCNs) doped with transition-metal-supported Pt catalysts were prepared by colloidal deposition and evaluated for the selective oxidation of glycerol to glyceric acid (GLYA) under nonalkaline conditions. The transition metal contained in the catalyst was found to affect its performance and selectivity for GLYA, with the Pt/Zr@NPCN catalyst showing the highest catalytic activity and selectivity. These materials were characterized using Brunauer-Emmett-Teller surface area analysis, transmission electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and CO2 temperature-programmed desorption. The results showed that the small size of the Pt nanoparticles, the interaction between the Pt nanoparticles and the support, and the unique textural properties of the catalyst all promoted glycerol conversion and GLYA selectivity. A Zr concentration of 1.5 wt % and a support preparation temperature of 800 °C were found to provide a catalyst with the optimal performance that exhibited a glycerol conversion and selectivity for GLYA of 68.62 and 77.29%, respectively, at an initial O2 pressure of 10 bar and 60 °C after 6 h. Even after being recycled five times, this material provided a GLYA selectivity of approximately 75%, although the glycerol conversion decreased from 68 to 50%. The insights may provide new suggestions on the design of efficient support for the selective oxidation of polyols.
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