期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 7, 期 12, 页码 10349-10362出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b00350
关键词
2,5-Dimethylfuran; Biofuel; CuPd alloy; 5-Hydroxymethylfurfural; Interfacial effects; Hydrogenolysis
资金
- Council of Scientific and Industrial Research (CSIR)-UGC, New Delhi
- IICT-RMIT joint Ph.D. program
- Basic Science Research Program of the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2018R1A1A1A05079555]
- Technology Development Program to Solve Climate Changes of the National Research Foundation of Korea (NRF) - Ministry of Science and ICT [2017M1A2A2087630]
- MOTIE [KIAT_N0001754]
- UNIST [1.180082.01]
- Department of Science and Technology, India [GAP-0522]
- INSA-JSPS Fellowship
- National Research Foundation of Korea [2018R1A1A1A05079555] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Selective formation of 2,5-dimethylfuran (DMF) by hydrogenolysis of lignocellulosic biomass-derived 5-hydroxymethylfurfural (HMF) is highly desirable for renewable liquid biofuel production. Here we have synthesized Cu-Pd bimetallic nanoparticles embedded in carbon matrix (Cu-Pd@C) by simple pyrolysis of Pd-impregnated Cu-based metal-organic frameworks (MOFs) followed by conventional hydrogenation route. It was found that Cu-Pd@C-B (solid-gas-phase hydrogenation route) with Cu-Pd bimetallic alloying exhibited brilliant catalytic performance at 120 degrees C under 15 bar H-2 pressure to produce liquid DMF biofuel with 96.5% yield from HMF as compared with the Cu-Pd@C-A catalyst (liquid phase hydrogenation route), which gave 46.4% yield under the same conditions. X-ray photoelectron spectroscopy (XPS) and X-ray absorption near-edge structure (XANES) studies reveal that Pd in Cu-Pd@C-B catalyst is electronically promoted by Cu with the unique intrinsic synergy of increased Pd-Pd bond distance and decreased Cu-Cu bond length, which eventually modulate the local atomic structural environment and result in enhanced catalytic activity. Moreover, the entrapped bimetallic nanoparticles with carbon shells in Cu-Pd@C-B catalyst further protect the active catalytic site from migration, aggregation, and leaching during hydrogenolysis reaction and improve the stability of the catalyst.
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