Weak-Acid Sites Catalyze the Hydrolysis of Crystalline Cellulose to Glucose in Water: Importance of Post-Synthetic Functionalization of the Carbon Surface
Weak-Acid Sites Catalyze the Hydrolysis of Crystalline Cellulose to Glucose in Water: Importance of Post-Synthetic Functionalization of the Carbon Surface
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DOI：
10.1002/anie.201504865
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发表时间：
2015-09-14
影响因子：
16.6
通讯作者：
Katz, Alexander
中科院分区：
文献类型：
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作者：
Anh The To;Chung, Po-Wen;Katz, Alexander
结晶纤维素在水中直接水解为葡萄糖，无需事先预处理，可以将生物质转化为燃料和化学品。为了了解固体催化剂的哪些特征对于这种转变最重要，纳米多孔碳材料 MSC-30 通过氧化进行了合成后功能化。最活跃的催化剂无需预先在水中预处理即可解聚结晶纤维素，以前所未有的 70% 产率提供葡萄糖。相比之下，即使在 pH 2 的水溶液中进行反应，MSC-30 也几乎没有观察到任何反应。由于这种固-固反应的活性与内部位点特征（例如 β-glu 吸附能力和吸附的 β-glu 链的催化水解速率）之间没有直接相关性，因此认为外表面与纤维素晶体的接触是整体反应的关键。 效率。
The direct hydrolysis of crystalline cellulose to glucose in water without prior pretreatment enables the transformation of biomass into fuels and chemicals. To understand which features of a solid catalyst are most important for this transformation, the nanoporous carbon material MSC-30 was post-synthetically functionalized by oxidation. The most active catalyst depolymerized crystalline cellulose without prior pretreatment in water, providing glucose in an unprecedented 70% yield. In comparison, virtually no reaction was observed with MSC-30, even when the reaction was conducted in aqueous solution at pH 2. As no direct correlations between the activity of this solid-solid reaction and internal-site characteristics, such as the beta-glu adsorption capacity and the rate of catalytic hydrolysis of adsorbed beta-glu strands, were observed, contacts of the external surface with the cellulose crystal are thought to be key for the overall efficiency.