Selective CO-to-acetate electroreduction via intermediate adsorption tuning on ordered Cu?Pd sites
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Ji, Yali↗
SEARCH · Engineering Papers
Results for “Cu”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Structural and kinetic changes to small-pore Cu-zeolites after hydrothermal aging treatments and selective catalytic reduction of NO[subscript x] with ammonia
Abstract not provided
Albarracin-Caballero, Jonatan D.↗
An ethylene cross-bridged pentaazamacrocycle and its Cu 2+ complex: constrained ligand topology and excellent kinetic stability
Extending the benefits of ethylene cross-bridging to pentaazamacrocycles has been achieved and a transition metal complex prepared and structurally characterized.
Shircliff, Anthony D.↗
Facile benzene reduction promoted by a synergistically coupled Cu–Co–Ce ternary mixed oxide
Hydrogenation of aromatic rings promoted by earth-abundant metal composites under mild conditions is an attractive and challenging subject in the long term.
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
Distribution of alkali cations near the Cu (111) surface in aqueous solution
Cation behavior and distribution at the electrochemical interface under both neutral and charged conditions.
Xi, Cong↗
Oxidative dehydrogenation of cyclohexene on atomically precise subnanometer Cu 4− n Pd n (0 ≤ n ≤ 4) tetramer clusters: the effect of cluster composition and support on performance
High fidelity selectivity tuning of the oxidative dehydrogenation of cyclohexene was achieved through the control of the atomic composition of CuPd clusters and their interactions with the support.
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
Optical detection of alcohols with a Cu($\tiny{I}$)HETPHEN complex by reversible aldehyde to hemiacetal conversion
A heteroleptic copper(I) bis(phenanthroline) complex with aldehyde groups at the 4,7 positions of the phenanthroline ligand was synthesized. Here, the complex is responsive to alcohol, resulting in a distinct colour change caused by the facile reaction of the aldehyde group with alcohol, forming a hemiacetal product. The aldehyde species can be regenerated after heating the intermediate at 80 °C for 10 minutes, demonstrating the reusability of the complex for alcohol detection. This work presents a new strategy for applying transition metal complexes in small molecule sensing by installing functional groups in the secondary coordination sphere which reversibly react with analytes.
36 MATERIALS SCIENCE↗
Quantum effects in CH activation with [Cu 2 O 2 ] 2+ complexes
Examining the importance of tunneling in the oxo-insertion and radical recombination mechanisms of CH hydroxylation with dicopper-dioxo complexes.
Bac, Selin↗
Origin of photoelectrochemical CO 2 reduction on bare Cu(In,Ga)S 2 (CIGS) thin films in aqueous media without co-catalysts
Photoelectrochemical (PEC) CO 2 reduction (CO 2 R) directly on chalcogenide semiconductor surface in an aqueous environment.
Prabhakar, Rajiv Ramanujam [Liquid Sunlight Allian↗
Selective oxidation of active site aromatic residues in engineered Cu proteins
Engineered metalloproteins that mimic the active sites of natural copper metalloenzymes are used to systematically investigate the influence of aromatic residues within the secondary coordination sphere on reactivity.
Chemistry↗
Synthesis, optical, electronic and magnetic studies of air-stable chiral Cu( ii ) chlorides
The development of polar MHSs with competitive chiroptical and magnetic properties, featuring record air stability of over a year.
Azmy, Ali↗
Influence of H 2 -ICE specific exhaust conditions on the activity and stability of Cu-SSZ-13 deNO x catalysts
NO x abatement from H 2 internal combustion engines (H 2 -ICEs) is challenging due to high H 2 O content and unburned H 2 in the exhaust.
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CH↗
Kinetic and process modeling of Guerbet coupling chemistry over Cu–Mg–Al mixed oxides
Kinetic modeling of Guerbet coupling chemistry over a CuMgAlO x catalyst is presented. Integration of the model in a process simulation enables assessing a recycling strategy to optimize the production of diesel fuel precursors.
Chavarrio, Javier E. [Department of Chemical and B↗
Bypassing sulfides: comparing the morphology and performance of solution processed Cu(In,Ga)Se 2 films prepared via two selenide molecular precursor routes
Solution-processing of thin-film photovoltaics offers an alternative to vacuum-deposition based approaches. The amine–thiol reactive solvent system has become a focal point for the solution-processing of chalcogenide species, owing to the convenience of precursor preparation and comparatively high performance of prepared devices. Selenide species prepared via the amine–thiol route typically progress through a sulfide intermediate phase, and as such are commonly afflicted with sulfur and carbon impurities along- side the presence of a carbonaceous fine-grained layer. Here, two routes of preparing films directly to a selenide phase are examined; first by the co-dissolution of selenium in an amine–thiol solution and second via the novel use of reactive alkylammonium polyselenides. Lamella are cut from these selenide precursor films and final devices, and STEM-EDX and TEM are used to characterize film morphology and secondary phases. A champion device efficiency of 11.2% is reported for the novel polyselenide route, and clear paths of improvement are identified.
36 MATERIALS SCIENCE↗
Composition-dependent hydrogen oxidation activity of Pt–Cu nanoparticles prepared using boron-rich nanosheets
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Stavila, Vitalie [Sandia National Laboratories (SN↗
Negligible spin–charge conversion in Bi films and Bi/Ag(Cu) bilayers
Spin pumping experiments using ferromagnetic metals have reported highly efficient spin–charge conversion in Bi and at the Bi/Ag interface, possibly due to the inverse Rashba–Edelstein effect. However, longitudinal spin Seebeck effect experiments using the yttrium iron garnet ferrimagnetic insulator in Bi films and Bi/Ag bilayers do not show evidence of appreciable spin-to-charge conversion except the large Nernst signal inherent to Bi. These contrasting conclusions highlight the differences between magnetic metals and magnetic insulators as spin current injectors. Only the detected voltages that adhere to the inverse spin Hall effect of j C = (2e/h)θ SH j S x σ are due to spin currents.
36 MATERIALS SCIENCE↗
Growth and characterization of La 0.67 Sr 0.33 MnO 3 /YBa 2 Cu 3 O 7- δ bilayers
Understanding the interplay of ferromagnets and superconductors requires high quality interfaces. To this end, we have fabricated heterostructures of the cuprate superconductor YBa2Cu3O7-δ (YBCO) with the metallic ferromagnet La0.67Sr0.33MnO3 (LSMO) via pulsed laser deposition on SrTiO3 (STO) (001) and (LaAlO3)0.3(Sr2TaAlO6)0.7 (LSAT) (001) substrates. By varying the YBCO thickness from 1.7-13.6 nm while keeping the LSMO thickness at 12 nm, we have studied the interplay between ferromagnetism and superconductivity in the in-plane transport and magnetic properties of the bilayers. X-ray reflectivity data indicate the presence of a 2-3 nm thick interfacial layer between the LSMO and YBCO layers in all heterostructures. In-plane transport measurements exhibit suppression of the superconducting transition temperature from bulk YBCO values. Magnetometry measurements indicate high LSMO saturation magnetization values for samples grown on STO substrates and even higher (bulk-like) magnetization for bilayers grown on LSAT substrates. Together these results indicate that the interdiffused layer is largely attributed to a modified YBCO layer.
36 MATERIALS SCIENCE↗