Strong metal-support interaction of palladium carbide in PtPd/C catalysts for enhanced catalytic transfer hydrogenolysis of glycerol
Strong metal-support interaction of palladium carbide in PtPd/C catalysts for enhanced catalytic transfer hydrogenolysis of glycerol
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DOI：
10.1016/j.biombioe.2022.106507
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Xin Jin
中科院分区：
文献类型：
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作者：
Dongpei Zhang;Wei Yu;Ze Li;Zhenyang Wang;Bin Yin;Xi Liu;Jian Shen;Chaohe Yang;Wenjuan Yan;Xin Jin
Catalytic transfer hydrogenolysis of glycerol can give 1,2-propanediol under mild condition (200 °C) in the absence of external H 2 . Most existing studies have been focused on metallic catalysts for tandem H 2 generation and hydrogenolysis. In this work, a series of bimetallic PtPd/C catalysts with PdC x as promoting role, were synthesized with different calcination temperatures (300–900 °C) and varied Pt/Pd molar ratio (Pd/Pt: 0.5–2.0), to investigate the structure-activity relationship over the in-situ transfer hydrogenation of glycerol. In particular, PtPd/C-900 catalysts showed the best performance (TOF: 37.6 h −1 , 1,2-PDO selectivity: 45.3%). It is evidenced that varied metal particle sizes (2.6–7.0 nm) were obtained, and catalytic transfer hydrogenolysis of glycerol displayed size sensitivity over PtPd/C catalysts. Besides, strong metal-support interaction can promote the formation of palladium carbide (PdC x ), thus changing the electronic structure of Pt atoms, and improving the activity of hydrogenation reaction and WGS + Reforming reaction. This study will provide insights for the structural design of catalyst for selective transfer hydrogenation of bio-polyols. • Proposed and validated novel Pd carbide catalysts for transfer hydrogenolysis reactions. • Hydrodeoxygenation of glycerol in the absence of external H 2 for reduced carbon footprint. • Structure-sensitivity analysis for H 2 generation and hydrogenation reactions.
