H 2 -free semi-hydrogenation at room temperature shows great advantage for replacing the thermocatalytic process in industry owing to the high energy and resource saving, however, remains great challenges. Herein, a t...
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H 2 -free semi-hydrogenation at room temperature shows great advantage for replacing the thermocatalytic process in industry owing to the high energy and resource saving, however, remains great challenges. Herein, a tree-like Pd dendrites array decorated Pd membrane was constructed as the core device in an electrochemistry assisted gas-fed membrane reactor for butadiene semi-hydrogenation. It reveals that hydrogen atomic sieving effect of this Pd-based membrane under electrochemical condition was the key for semi-hydrogenation. The configuration study of Pd nanostructured membrane demonstrates that the penetration of hydrogen atoms through Pd membrane from electrochemical side to chemical side is affected by the consumption of hydrogen atom in semi-hydrogenation step. Such atomic sieving property of nanostructured Pd membrane with 5.1 times increase in catalytic active surface area brings above 14 times higher in butadiene conversion than that of bare Pd foil, with ≈90 % of butenes selectivity at butadiene conversion ≈98 % over 300 h of H 2 -free reaction under 15 mA cm −2 .
Nitrogen atom-rich heterocycles and organic azides have found extensive use in many sectors of modern chemistry from drug discovery to energetic materials. The prediction and understanding of their energetic propertie...
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Nitrogen atom-rich heterocycles and organic azides have found extensive use in many sectors of modern chemistry from drug discovery to energetic materials. The prediction and understanding of their energetic properties are thus key to the safe and effective application of these compounds. In this work, we disclose the use of multivariate linear regression modeling for the prediction of the decomposition temperature and impact sensitivity of structurally diverse tetrazoles and organic azides. We report a data-driven approach for property prediction featuring a collection of quantum mechanical parameters and computational workflows. The statistical models reported herein carry predictive accuracy as well as chemical interpretability. Model validation was successfully accomplished via tetrazole test sets with parameters generated exclusively in silico. Mechanistic analysis of the statistical models indicated distinct divergent pathways of thermal and impact-initiated decomposition.
作者:
Joseph Raj XavierDepartment of Chemistry
Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Chennai India Contribution: Conceptualization (lead)
Data curation (lead) Formal analysis (lead) Funding acquisition (lead) Investigation (lead) Methodology (lead) Project administration (lead) Resources (lead) Software (lead) Supervision (lead) Validation (lead) Visualization (lead) Writing - original draft (lead) Writing - review & editing (lead)
The anticorrosion, flame retardant, and mechanical properties of polyurethane (PU) coatings have been improved by the integration of nickel disulfide (NiS 2 ), 2,5-Bis(4-aminophenyl)-1,3,4-oxadiazole (BAO), and graphe...
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The anticorrosion, flame retardant, and mechanical properties of polyurethane (PU) coatings have been improved by the integration of nickel disulfide (NiS 2 ), 2,5-Bis(4-aminophenyl)-1,3,4-oxadiazole (BAO), and graphene oxide (GO). The structural, morphological, dielectric, and hydrophobic behaviors of the films were characterized for the different formulations of coatings such as pure PU, PU-NiS 2 , PU-BAO/NiS 2 , PU-GO/NiS 2 , and PU-GO/BAO-NiS 2 (nanocomposite) by means of scanning electron microscope/X-ray energy dispersive spectroscopy, transmission electron microscope, thermogravimetric analysis, X-ray photoelectron spectroscopy, X-ray diffraction, and contact angle measurement. As a result, with the addition of only 0.3% GO/BAO-NiS 2 , the dielectric constant of PU was increased by 81-fold at 1 Hz. Additionally, the nanocomposite had significantly lower peak heat release rate and overall heat released values than pure PU, a difference of 57% and 51%, respectively, demonstrating its greater flame retardancy. The electrochemical techniques and mechanical testing confirmed that GO/BAO-NiS 2 (0.3%) composite exhibit enhanced anticorrosive, hydrophobic, flame retardancy, and mechanical performance of the PU coating. The super hydrophobic behavior is confirmed by its water contact angle of 165°. Furthermore, the resistance of the nanocomposite was found to be much higher (16,985.6 kΩ.cm 2 ) than that of the pure PU (145.4 kΩ.cm 2 ) and the microhardness and tensile strength were increased sharply. Therefore, the nanocomposite could act as a potential coating material for industrial applications.
Bison-Fly is the open-source pipeline of unoccupied aerial vehicle (UAV) applications for plant breeding developed by the Spring Wheat Breeding Program at North Dakota State University in partnership with the Drone2Ph...
Bison-Fly is the open-source pipeline of unoccupied aerial vehicle (UAV) applications for plant breeding developed by the Spring Wheat Breeding Program at North Dakota State University in partnership with the Drone2Phenome community. We present a step-by-step pipeline to collect, process, and apply UAV data for plant breeding to facilitate data processing, reduce errors, and create new traits. This open-source R code can be easily adapted for different crops and improved according to user requirements. In addition, Bison-Fly provides a free and complete dataset with (a) RGB, Multispectral, and Digital Surface Model orthomosaics from 15 time points throughout the season; (b) field trait data with experimental design; and (c) daily metadata with soil and weather information. We hope this pipeline helps guide students, researchers, and breeders on day-to-day activities. Bison-Fly is available at https://***/filipematias23/Bison-Fly .
Layered silicates are a very versatile class of materials with high importance to humanity. The new nitridophosphates M P 6 N 11 ( M =Al, In), synthesized from M Cl 3 , P 3 N 5 and NH 4 N 3 in a high-pressure high-tem...
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Layered silicates are a very versatile class of materials with high importance to humanity. The new nitridophosphates M P 6 N 11 ( M =Al, In), synthesized from M Cl 3 , P 3 N 5 and NH 4 N 3 in a high-pressure high-temperature reaction at 1100 °C and 8 GPa, show a mica-like layer setup and feature rare nitrogen coordination motifs. The crystal structure of AlP 6 N 11 was elucidated from synchrotron single-crystal diffraction data (space group Cm (no. 8), a =4.9354(10), b =8.1608(16), c =9.0401(18) Å, β =98.63(3)°), enabling Rietveld refinement of isotypic InP 6 N 11 . It is built up from layers of PN 4 tetrahedra, PN 5 trigonal bipyramids and M N 6 octahedra. PN 5 trigonal bipyramids have been reported only once and M N 6 octahedra are sparsely found in the literature. AlP 6 N 11 was further characterized by energy-dispersive X-ray (EDX), IR and NMR spectroscopy. Despite the vast amount of known layered silicates, there is no isostructural compound to M P 6 N 11 as yet.
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