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Atomically-ordered active sites in NiMo intermetallic compound toward low-pressure hydrodeoxygenation of furfural.
- Source :
-
Applied Catalysis B: Environmental . Mar2021, Vol. 282, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- • A NiMo intermetallic compound (IMC) catalyst was prepared based on layered double hydroxides (LDHs). • This NiMo IMC exhibits excellent yield toward furfural hydrodeoxygenation at a rather low hydrogen pressure (0.1 MPa). • The atomically-ordered Ni/Mo sites in IMC determine the uniform bridging-type adsorption mode of furfural. • The ordered Ni-Mo bimetallic sites facilitate the activation and cleavage of C OH bond to produce 2-methylfuran. Activation of oxygen-containing functional groups plays a key role in sustainable biomass upgrading and conversion. In this work, a NiMo intermetallic compound (IMC) catalyst was prepared based on layered double hydroxides (LDHs) precursors, which displayed prominent catalytic performance for furfural hydrodeoxygenation (HDO) to 2-methylfuran (2-MF) (yield: 99 %) at a rather low hydrogen pressure (0.1 MPa), significantly superior to NiMo alloy, monometallic Ni and other Ni-based catalysts ever reported. CO-IR, STEM, EXAFS and XANES give direct evidences that the atomically-ordered Ni/Mo sites in NiMo IMC determine the uniform bridging-type adsorption mode of C O bond in furfural whilst adsorption of furan ring is extremely suppressed. In situ FT-IR and DFT calculation further substantiate that ordered Ni-Mo bimetallic sites of IMC, in contrast to the random atomic sequence in NiMo alloy, facilitate the activation and cleavage of C OH bond in the intermediate (furfuryl alcohol, FOL), accounting for the production of 2-MF. This work demonstrates the decisive effect of atomically-ordered active sites in IMC catalyst on activation of oxygen-containing functional groups and product selectivity, which can be extended to catalytic upgrading of biomass-derived platform molecules. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09263373
- Volume :
- 282
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis B: Environmental
- Publication Type :
- Academic Journal
- Accession number :
- 147017628
- Full Text :
- https://doi.org/10.1016/j.apcatb.2020.119569