Back to Search
Start Over
Insight into the Effect of Dual Active Cu0/Cu+ Sites in a Cu/ZnO-Al2O3 Catalyst on 5-Hydroxylmethylfurfural Hydrodeoxygenation
- Source :
- ACS Sustainable Chemistry & Engineering. 8:15288-15298
- Publication Year :
- 2020
- Publisher :
- American Chemical Society (ACS), 2020.
-
Abstract
- The production of biofuel 2,5-dimethylfuran (DMF) from an important biomass platform of 5-hydroxymethyl furfural (HMF) involves a complicated reaction pathway due to the competition of C=O hydrogenation and C-O hydrogenolysis; however, the dependence of formed intermediates and catalytic sites needs to be further identified. Herein, we constructed a highly efficient and selective Cu/ZnO-Al2O3 catalyst via reduction of a CuZnAl-layer double hydroxide (LDH) precursor, aimed for studying the effect of Cu-0/Cu+ species on forming different intermediates and their synergetic promotional effect on HMF hydrodeoxygenation. As expected, the dependence of formation of different intermediates on the Cu+/Cu-0 ratio was observed; notably, Cu/ZnOAl2O3 with higher Cu+/Cu-0 ratio finally gave 90.1% DMF selectivity at 100% HMF conversion, more selective than CuNi/(AlO3)-O-2 (59.6%) and Cu/MgO-Al2O3 (75.8%) references. By a combined study of in situ IR experiments, the observed correlation between the reaction intermediates and the Cu-0/Cu+ site suggests that Cu-0 tends to adsorb the C=O bond as well as hydrogen molecule, while the Cu+ site is preferable to adsorb and activate the C-O bond. With the synergy of dual active sites, the Cu/ZnO-(AlO3)-O-2 catalyst showed both high activity and selectivity to DMF. This work provides deep insight into the nature of active Cu species in multiple functional group biomass platform transformation.
- Subjects :
- LDH
General Chemical Engineering
media_common.quotation_subject
Cu-based catalyst
Biomass
dual active sites
02 engineering and technology
010402 general chemistry
Furfural
01 natural sciences
Competition (biology)
Catalysis
C-O bond activation
chemistry.chemical_compound
Environmental Chemistry
LDHs
media_common
Renewable Energy, Sustainability and the Environment
Chemistry
General Chemistry
021001 nanoscience & nanotechnology
0104 chemical sciences
Dual (category theory)
biofuel
Chemical engineering
Biofuel
dual active site
0210 nano-technology
Hydrodeoxygenation
Subjects
Details
- ISSN :
- 21680485
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- ACS Sustainable Chemistry & Engineering
- Accession number :
- edsair.doi.dedup.....8da9a113ee94f9437eb9b97cfddf0d82