Enhanced stability of tungsten carbide catalysts via superhydrophobic modification for one-pot conversion of biomass-derived fructose involving water and iodine
Enhanced stability of tungsten carbide catalysts via superhydrophobic modification for one-pot conversion of biomass-derived fructose involving water and iodine
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DOI：
10.1016/j.apsusc.2021.150523
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发表时间：
2021-11
影响因子：
6.7
通讯作者：
Jianjun Xiao;Qinfang Chen;Rui Yu;Jiayi Qian;Zihao Liu;Teng Li;Hai-xiao Yang;Jing’ai Shao;Weiran Yang;Hanping Chen
中科院分区：
文献类型：
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作者：
Jianjun Xiao;Qinfang Chen;Rui Yu;Jiayi Qian;Zihao Liu;Teng Li;Hai-xiao Yang;Jing’ai Shao;Weiran Yang;Hanping Chen
在生物质化学中开发具有成本效益和高性能的催化剂的动机是创造依赖于廉价和丰富资源的可持续技术。现有的由生物质衍生的果糖通过碘化氢（HI）介导直接制备5-甲基糠醛（5-MF）的方法主要需要贵金属催化剂。本研究表明，低成本的碳化钨（WC）能够通过液相加氢从碘（I2）生产HI，但关键限制是在水和I2的联合作用下稳定性差。为了解决这一问题，采用简单的液相沉积法，用疏水性有机硅对体相WC和高分散负载型WC进行改性。两种超疏水WC材料均具有较好的稳定性，其催化活性可与昂贵的Pd/C催化剂相媲美，尤其是超疏水高分散负载型WC。本研究结果表明，低成本的WC经简单的超疏水改性后，可用于辅助HI介导果糖直接合成5-MF，对低成本生物质化工的可持续发展具有重要意义。
Developing cost-effective and high-performance catalysts in biomass chemistry is motivated by creating sustainable technologies dependent on inexpensive and abundant resources. The existing methods for the direct preparation of 5-methylfurfural (5-MF) from biomass-derived fructose mediated by hydrogen iodide (HI) mainly require precious metal catalysts. This research showed that low-cost tungsten carbide (WC) was capable to produce HI from iodine (I2) via liquid-phase hydrogenation, but a pivotal limitation was the poor stability under the combination effects of water and I2. To solve this problem, the bulk WC and the high dispersion supported WC were modified by hydrophobic organosilicones through simple liquid phase deposition. Both of the two superhydrophobic WC materials had better stability and their catalytic activity were comparable to the expensive palladium-carbon (Pd/C) catalyst in the preparation of 5-MF, especially the superhydrophobic high dispersion supported WC. This work highlights the potential of the low-cost WC with simple superhydrophobic modification in assisting the direct preparation of 5-MF from fructose mediated by HI, which has high significance to the sustainable development of the low-cost biomass chemical engineering.