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首页> 外文期刊>Catalysis Today >Selective hydrogenation of biomass-derived 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF) under atmospheric hydrogen pressure over carbon supported PdAu bimetallic catalyst
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Selective hydrogenation of biomass-derived 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF) under atmospheric hydrogen pressure over carbon supported PdAu bimetallic catalyst

机译：碳负载的PdAu双金属催化剂上，在大气压氢气压下，将生物质衍生的5-羟甲基糠醛（HMF）选择性氢化为2,5-二甲基呋喃（DMF）

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摘要

Hydrogenation of 5-hydroxymethylfurfural (HMF) to 2,5-dimethylfuran (DMF) was examined by Pd_xAu_y/C catalysts prepared with various Pd/Au molar ratio (x/y) in the presence of hydrochloric acid (HCl) under an atmospheric hydrogen pressure. Bimetallic Pd_xAu_y/C catalysts had a significant activity for a selective hydrogenation of HMF toward DMF comparing to monometallic Pd/C and Au/C catalysts. To clarify the novelty of Pd_xAu_y/C catalysts, characterizations by using X-ray diffraction (XRD), X-ray photo-electron spectroscopy (XPS), X-ray absorption spectra (XAFS), a transmission electron microscopy (TEM) and other analytical techniques were studied. XPS and X-ray absorption near-edge structure (XANES) analyses indicated that there was the charge transfer phenomenon from Pd to Au atoms in Pd_xAu_y/C. Existence of PdAu alloy structures in Pd_xAu_y/C was expected by XRD, TEM and extended X-ray absorption fine structure (EXAFS) analyses. Accordingly, we concluded that PdAu alloys supported carbon exhibited a good catalytic performance for a selective hydrogenation of HMF to DMF using an atmospheric hydrogen pressure.
机译：在空气中存在氢氯酸（HCl）的情况下，通过以各种Pd / Au摩尔比（x / y）制备的Pd_xAu_y / C催化剂检查了5-羟甲基糠醛（HMF）加氢成2,5-二甲基呋喃（DMF）压力。与单金属Pd / C和Au / C催化剂相比，双金属Pd_xAu_y / C催化剂对HMF选择性氢化为DMF具有显着的活性。为了阐明Pd_xAu_y / C催化剂的新颖性，使用X射线衍射（XRD），X射线光电子能谱（XPS），X射线吸收光谱（XAFS），透射电子显微镜（TEM）等进行表征分析技术进行了研究。 XPS和X射线吸收近边缘结构（XANES）分析表明，在Pd_xAu_y / C中存在从Pd到Au原子的电荷转移现象。通过XRD，TEM和扩展X射线吸收精细结构（EXAFS）分析，可以预期Pd_xAu_y / C中存在PdAu合金结构。因此，我们得出结论，负载碳的PdAu合金对于使用大气压氢气将HMF选择性氢化为DMF表现出良好的催化性能。

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