Selective C−O Bond Cleavage of Bio‐Based Organic Acids over Palladium Promoted MoO x /TiO 2
Selective C−O Bond Cleavage of Bio‐Based Organic Acids over Palladium Promoted MoO x /TiO 2
复制标题
钯促进的 MoO x /TiO 2 上生物基有机酸的选择性 C–O 键断裂
DOI：
10.1002/cctc.202001799
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发表时间：
2020
期刊：
影响因子：
4.5
通讯作者：
Pagán‐Torres, Yomaira J.
中科院分区：
文献类型：
--
作者：
Nacy, Ayad;de Lima e Freitas, Lucas Freitas;Albarracín‐Suazo, Sandra;Ruiz‐Valentín, Génesis;Roberts, Charles A.;Nikolla, Eranda;Pagán‐Torres, Yomaira J.
加氢脱氧化学在生物质衍生原料的升级中起着关键作用。其中，通过在多相催化剂上从含有多个官能团的分子中选择性地裂解C−O键来去除目标羟基已被证明是一个挑战。本文报道了一种高选择性、高稳定性的酒石酸加氢脱氧制备丁二酸的非均相催化剂。该催化剂由钯促进的还原的Mo5+中心组成，其促进选择性的C−O键断裂，同时留下完整的羧酸端基。在多个循环中表现出稳定的催化性能。这种催化体系为选择性加工具有高度化学功能性的生物质衍生糖酸提供了机会。
Hydrodeoxygenation chemistries play a key role in the upgrading of biomass‐derived feedstocks. Among these, the removal of targeted hydroxyl groups through selective C−O bond cleavage from molecules containing multiple functionalities over heterogeneous catalysts has shown to be a challenge. Herein, we report a highly selective and stable heterogeneous catalyst for hydrodeoxygenation of tartaric acid to succinic acid. The catalyst consists of reduced Mo5+centers promoted by palladium, which facilitate selective C−O bond cleavage, while leaving intact carboxylic acid end groups. Stable catalytic performance over multiple cycles is demonstrated. This catalytic system opens up opportunities for selective processing of biomass‐derived sugar acids with a high degree of chemical functionality.