One-Pot Defunctionalization of Lignin-Derived Compounds by Dual-Functional Pd50Ag50/Fe3O4/N-rGO Catalyst

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• 作者：Ajay K. Singh ; Seungwook Jang ; Jae Yul Kim ; Siddharth Sharma ; K.C Basavaraju ; Min-Gyu Kim ; Kyung-Rok Kim ; Jae Sung Lee ; Hong H. Lee ; Dong-Pyo Kim
• 刊名：ACS Catalysis
• 出版年：2015
• 出版时间：November 6, 2015
• 年：2015
• 卷：5
• 期：11
• 页码：6964-6972
• 全文大小：665K
• ISSN：2155-5435

文摘

Generation of hydrogen from renewable sources and its safe utilization for efficient one-pot upgrading of renewable biofuels are a challenge. Bimetallic PdAg catalyst supported on Fe₃O₄/nitrogen-doped reduced graphene oxide (N-rGO) were synthesized for hydrogen generation from formic acid with high TOF (497 h^鈥? at 50 掳C), and the hydrogen was subsequently utilized in situ for selective defunctionalization of lignin-derived chemicals with preserved aromatic nature at ambient pressure. Hydrodeoxygenation of aromatic aldehydes and ketones gave excellent yields (99% at 130 掳C) with no use of additives. Furthermore, hydrogenolysis of 尾-O-4 and 伪-O-4 C鈥揙 model compounds produced only two products with high selectivity at 120 掳C, which is an efficient and versatile one-pot platform for valorization of lignin biomass.