Catalysis and characterization of carbon-supported ruthenium for cellulose hydrolysis
Catalysis and characterization of carbon-supported ruthenium for cellulose hydrolysis
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DOI：
10.1016/j.apcata.2011.08.039
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发表时间：
2011-11
影响因子：
5.5
通讯作者：
T. Komanoya;Hirokazu Kobayashi;K. Hara;W. Chun;A. Fukuoka
中科院分区：
文献类型：
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作者：
T. Komanoya;Hirokazu Kobayashi;K. Hara;W. Chun;A. Fukuoka
以介孔碳CMK-3为载体的Ru催化剂在503K下对热压缩水中纤维素水解制葡萄糖表现出了较高的活性和耐久性。Ru/CMK-3催化剂还在393K下将纤维二糖在水中水解为葡萄糖。用X射线衍射仪、透射电子显微镜、XPS、H2-TPR、O2-滴定、XAFS等物理化学方法对CMK-3上的活性Ru物种进行了表征，阐明了活性物种的形成途径。这些研究表明，在673K下，RuCl3/CMK-3经氢气还原后，在CMK-3上生成了水合Ru氧化物RuO2·2H2O，并且平均粒径为1.1 nm的Ru氧化物纳米粒子在CMK-3上高度分散。
Ru catalyst supported on mesoporous carbon CMK-3 shows high activity and durability for the hydrolysis of cellulose to glucose in hot compressed water at 503K. The Ru/CMK-3 catalyst also hydrolyzes cellobiose to glucose in water at 393K. Several physicochemical methods such as XRD, TEM, XPS, H2-TPR, O2-titration, and XAFS were used to characterize active Ru species on CMK-3 and to clarify the formation pathway of the active species. From these studies, we conclude that hydrous Ru oxide RuO2·2H2O is formed on CMK-3 after H2-reduction of RuCl3/CMK-3 at 673K and subsequent passivation at room temperature, and that the Ru oxide nanoparticles with a mean diameter of 1.1nm are highly dispersed on CMK-3.