Strong metal-support interaction of palladium carbide in PtPd/C catalysts for enhanced catalytic transfer hydrogenolysis of glycerol. (August 2022)

• Record Type: Journal Article
• Authors: Zhang, Dongpei; Yu, Wei; Li, Ze; Wang, Zhenyang; Yin, Bin; Liu, Xi; Shen, Jian; Yang, Chaohe; Yan, Wenjuan; Jin, Xin
• Is Part Of: Biomass and bioenergy. Volume 163(2022)
• Publication Date: 2022-08
• Subjects: Strong metal-support interaction -- Catalytic transfer hydrogenolysis -- Palladium carbide -- Promoting mechanism; Biomass energy -- Periodicals; Biomass -- Periodicals; Energy-Generating Resources -- Periodicals; Bioénergie -- Périodiques; 333.9539
• DOI: 10.1016/j.biombioe.2022.106507
• Languages: English
• ISSNs: 0961-9534

Abstract

Abstract: Catalytic transfer hydrogenolysis of glycerol can give 1, 2-propanediol under mild condition (200 °C) in the absence of external H2 . Most existing studies have been focused on metallic catalysts for tandem H2 generation and hydrogenolysis. In this work, a series of bimetallic PtPd/C catalysts with PdCx 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 (PdCx ), 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. Highlights: Proposed and validated novel Pd carbide catalysts for transfer hydrogenolysis reactions. Hydrodeoxygenation of glycerol in the absence of external H2 for reduced carbon footprint. Structure-sensitivity analysis for H2 generation and hydrogenation reactions.