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Controlling morphology and catalysis capability of Sn/Ce porous coordination polymers by cerium coordination for catalytic conversion of glucose to 5-hydroxymethylfurfural
Journal of the Taiwan Institute of Chemical Engineers ( IF 5.5 ) Pub Date : 2020-01-25 , DOI: 10.1016/j.jtice.2020.01.002
Siyu Sun , Xingyuan Lu , Xianling Meng , Peijun Ji

A novel porous coordination polymer (namely SnCe) has been synthesized by simultaneous coordination of Tin (Sn (IV)) and cerium (Ce (III/IV)) with the two ligands 5-sulfoisophthalic acid (SPA) and 1,3,5-benzenetricarboxylic acid (BTC). The morphology and surface area of SnCe can be controlled by the cerium-involved interfacial coordination, by taking advantage of the discrepancy of coordination ability between the two metal ions. The shape and size of the SnCes has a close relationship with the molar ratio of Sn to Ce. The mechanism of the formation of SnCe was investigated by electron microscopy measurement (scanning electron microscope) and XRD patterns. The catalysis capability was also controlled, with Sn (IV) and Ce (III/IV) as the Lewis acid sites and the sulfonate groups of SPA as the Brønsted acid sites. The Lewis acid sites can catalyze isomerization of glucose into fructose, and the Brønsted acid sites can catalyze the dehydration of fructose to 5-hydroxymethylfurfural (HMF) with a high efficiency. Thus, SnCe combines the bifunctional catalysis capability for producing HMF (an important platform chemical) from glucose. This work found that the morphology of catalyst has an effect on the catalyst capability. At the similar reaction conditions, the catalyst exhibits higher conversion and selectivity than those reported.



中文翻译:

铈配位控制Sn / Ce多孔配位聚合物的形貌和催化能力,用于葡萄糖催化转化为5-羟甲基糠醛

通过锡(Sn(IV))和铈(Ce(III / IV))与两个配体5-磺基间苯二甲酸(SPA)和1,3,5的同时配位,合成了一种新型的多孔配位聚合物(即SnCe)。 -苯三羧酸(BTC)。利用两种金属离子之间的配位能力差异,可以通过铈参与的界面配位来控制SnCe的形貌和表面积。SnCes的形状和尺寸与Sn与Ce的摩尔比密切相关。通过电子显微镜测量(扫描电子显微镜)和XRD图谱研究了SnCe的形成机理。还控制了催化能力,其中Sn(IV)和Ce(III / IV)作为路易斯酸位点,而SPA的磺酸盐基团作为Brønsted酸位点。路易斯酸位点可催化葡萄糖异构化为果糖,而布朗斯台德酸位点可高效催化果糖脱水成5-羟甲基糠醛(HMF)。因此,SnCe结合了双功能催化能力,可从葡萄糖生产HMF(一种重要的平台化学品)。这项工作发现催化剂的形态对催化剂的性能有影响。在相似的反应条件下,该催化剂显示出比报道的更高的转化率和选择性。这项工作发现催化剂的形态对催化剂的性能有影响。在相似的反应条件下,该催化剂显示出比报道的更高的转化率和选择性。这项工作发现催化剂的形态对催化剂的性能有影响。在相似的反应条件下,该催化剂显示出比报道的更高的转化率和选择性。

更新日期:2020-01-26
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