Abstract: An electroreduction system for converting carbon oxides selected from CO, CO2 or any mixture thereof into multicarbon (C2+) products. the system comprising a cathodic compartment having a reactant inlet and comprising a cathode, the cathode comprising a catalyst layer that is contactable with a catholyte solution; an anodic compartment having a product outlet to release the C2+ products, the anodic compartment comprising an anode and being configured to accommodate a flowing anolyte solution; and a bipolar membrane being positioned between the cathodic compartment and the anodic compartment, the bipolar membrane comprising an interfacial layer defined between a cation-exchange layer and a anion-exchange layer, wherein the cathodic compartment is configured to accommodate a stationary catholyte layer between the catalyst layer of the cathode and the CEL, the stationary catholyte layer comprising the catholyte solution.

Abstract: The present disclosure relates to the manufacturing and use of co-doped multi-metallic electrocatalysts for electroreduction of CO or CO2 to produce n-propanol. The co-doped multi-metallic electrocatalyst includes Cu as well as Ag and a secondary dopant, such as Ruthenium (Ru), Rhodium (Rh), Iridium (Ir), Palladium (Pd), Gold (Au) or Platinum (Pt). The co-doped multi-metallic electrocatalyst can be manufactured using a two-stage method where Cu nanoparticles are first doped with Ru and then doped with Ag. The co-doped multi-metallic electrocatalysts facilitate adsorption of CO, C1-C1 coupling, C1-C2 coupling and certain kinetics for the production of propanol by electroreduction with good selectivity at high current densities.

Abstract: A replacement tip section for a rotor blade, from which a legacy tip section was removed, includes a blade tip portion configured to be attached to an intermediate section of the rotor blade after removal of the legacy section. The intermediate section has a connection feature at an end of the intermediate section to which the blade tip portion is attachable. The replacement tip section includes a transition region configured to be attached to a forward end of the connection feature. The transition region is configured to form a leading edge of the rotor blade and extends from the blade tip portion to form an opening into which the intermediate section is attached. The transition region includes a first end having a first airfoil that conforms to the intermediate section airfoil at the connection feature, and a second end having a second airfoil that conforms to the blade tip portion.

Abstract: The present disclosure relates to an electrode for CO2 electroreduction in an acidic electrolyte comprising cation species, the electrode comprising: a substrate, a metal-based catalyst material, and a cation-augmenting material; wherein the cation-augmenting material comprises an acidic group exchanging protons with the cation species of the acidic electrolyte so as to increase a concentration of the cation species at a surface of the electrode.

Abstract: A self-cleaning CO2 reduction strategy is proposed herein including alternating operation and regeneration of the CO2 electrolysis system. The strategy includes application of short and periodic reductions in applied voltage, thereby avoiding saturation and prevention of carbonate salt formation.

Abstract: The disclosure discloses a membrane electrode assembly (MEA) for electrochemically converting carbon monoxide (CO) into ethylene (C2H4) under applied current density, the MEA comprising: a cathode; an anode; an anion-exchange membrane (AEM) to separate the cathode from the anode; an anolyte; a reactant inlet in fluid communication with the cathode to provide a CO-enriched gas component; and a product outlet in fluid communication with the cathode to release a product mixture comprising C2H4; wherein the cathode comprises: a first layer including adsorption sites to adsorb CO as CO* intermediates; a second layer that facilitates stabilization of the CO* intermediates for adsorption onto the adsorption sites of the first layer; and a third layer that facilitates diffusion of CO to the adsorption sites of the first layer.

Abstract: The invention relates to a composite multilayer carbon dioxide (CO2) reduction catalyst, comprising a catalyst layer comprising at least one metal compound, the catalyst layer having opposed first and second sides; a hydrophobic gas-diffusion layer provided on the first side of the catalyst layer; a current collection structure provided on the second side of the catalyst layer. The metal is preferably copper. The invention also relates to a method for electrochemical production of a hydrocarbon product, such as ethylene, using said catalyst.

Abstract: Ge-centered octahedral perovskites have heretofore not been achievable due to collapse of the perovskite structure into non-octahedral units due to a lack of B site support from the small-radius Ge atom, which breaks Goldschmidt’s rules for constructing octahedral perovskites. To overcome this shortcoming, a strategy was developed to form a strong cage with the A sites in which the octahedron is forced to remain intact. Strong intermolecular interaction between the organic A site cations were used to stabilize the symmetric Ge octahedral perovskite beyond the Goldschmidt’s rules. The molecules used based on Y-PMA (Y: F, Cl, Br, I) that facilitated strong halogen bonding to form the cage around the octahedral. Octahedral Ge perovskites exhibit a direct bandgap in contrast to the indirect bandgap of non-octahedral Ge perovskites are demonstrated. In addition, the octahedral Ge perovskite exhibited a dramatic increase in the carrier mobility.

Abstract: Electrosynthesis of oxirane can include contacting a halide electrolyte with an anode that includes an electrocatalyst comprising iridium oxide loaded with a period-6 metal oxide and provided on a metal substrate. The cathode can be operated under ORR conditions. The electrochemical system can also be provided as an integrated system that includes CO2 electroreduction to produce ethylene and formation of hypochlorous acid using the electrocatalyst, followed by contact of the ethylene and the hypochlorous acid to form ethylene chlorohydrin which is, in turn, contacted with OH? ions to produce oxirane.

Abstract: Electrosynthesis of oxirane can include contacting a halide electrolyte with an anode and cathode respectively located in anodic and cathodic compartments; supplying olefin reactants into the electrolyte in the anodic compartment, such that the anode generates ethylene chlorohydrin; withdrawing a loaded anodic solution comprising ethylene halohydrin from the anodic compartment, and a loaded cathodic solution comprising OH- ions from the cathodic compartment; and mixing the loaded anodic solution with the loaded cathodic solution under conditions to react ethylene halohydrin with OH- to produce oxirane. The electrocatalyst can include iridium oxide on a titanium substrate, with the iridium oxide provided as nanoparticles on a titanium mesh, and the electrolyte can be aqueous KCl.

Abstract: A semiconductor nanocrystal particle including a transition metal chalcogenide represented by Chemical Formula 1, the semiconductor nanocrystal particle having a size of less than or equal to about 100 nanometers, and a method of producing the same: M1M2Cha3??Chemical Formula 1 wherein M1 is Ca, Sr, Ba, or a combination thereof, M2 is Ti, Zr, Hf, or a combination thereof, and Cha is S, Se, Te, or a combination thereof.

Abstract: A biosensor comprising an electrode and inverted molecular pendulums (iMPs) is described. Each IMP includes a linker bound to the electrode, and an analyte receptor and a redox reporter both bound to the linker. The redox reporter is reactive at positive potential when the linker presents a net negative charge and reactive at negative potential when the linker presents a net positive charge. Upon application of an electric field, the biosensor is characterized by an iMPs unbound state, where no analyte is bound to the receptor, at which the iMPs are displaced towards the electrode and electron transfer from the iMPs towards the electrode occurs at an unbound electron transfer rate, and an iMPs bound state, where the analyte is bound to the receptor, at which the iMPs are displaced towards the electrode and electron transfer from the iMPs towards the electrode occurs at a bound electron transfer rate.

Abstract: An abrupt interface electroreduction catalyst includes a porous gas diffusion layer and a catalyst layer providing a sharp reaction interface. The electroreduction catalyst can be used for converting CO2 into a target product such as ethylene. The porous gas diffusion layer can be hydrophobic and configured for contacting gas-phase CO2 while the catalyst layer is disposed on and covers a reaction interface side of the porous gas diffusion layer. The catalyst layer has another side contacting an electrolyte and can be hydrophilic, composed a metal such as Cu and is sufficiently thin to prevent diffusion limitations of the reactant in the electrolyte and enhance selectivity for the target product. The electroreduction catalyst can be made by vapor deposition methods and can be used for electrochemical production of ethylene in reaction system.

Abstract: The present disclosure relates to electrocatalysts for electroreduction of a carbon-containing gas to produce n-propanol, for example. The electrocatalyst includes a multi-metallic material comprising a primary metal, such as Cu, and a metal dopant, such as Ag, selected and distributed to provide asymmetric active sites that include neighbouring atoms of the primary metal having distinct electronic structures to promote C2-C1 coupling. The electrocatalysts can be bimetallic or bimetallic, for example. The disclosure also relates to manufacturing and using the electrocatalysts, which can be used as a cathodic catalyst to convert CO or CO2 into multi-carbon products.

Abstract: Methods are disclosed to restore the halide ions lost in the purification (ligand removal) of photoluminescent cesium lead halide or FA lead halide perovskite quantum dots. Quantum dots thus prepared can be used to deposit solid films with high packing density featuring dots with <0.4 nm gaps therebetween, low trap density 1/40 of previously reported, high mobility 100× previously reported, high photoluminescent quantum yield exceeding 90%, high external quantum yield exceeding 20%, and increased stability under electrical current. The quantum dots are used to formulate inks suitable for ink jet printing, drop casting, spin coating, and other solution-based methods for forming emissive layers used in light producing semiconductor devices.

Abstract: The disclosure provides in its first aspect a catalyst system for gas-phase electrolysis of a reactant gas to form a product in an aqueous medium, the catalyst system comprising a catalytic material; an ion-conducting polymer layer provided on the catalytic material and comprising an ion-conducting polymer that includes hydrophilic and hydrophobic groups. Said catalyst system is remarkable in that the ion-conducting polymer layer has a thickness of 2 nm to 50 nm measured by transmission-electron microscopy. In its second aspect, the disclosure provides a method of manufacturing a catalyst system for gas-phase electrolysis of reactant gas to produce a product in an aqueous medium preferably according to the first aspect. The use of the catalyst system in accordance with the first aspect in the electrochemical production of at least one multi-carbon compound from a carbon-containing gas or of at least one product from a reactant gas is also disclosed.

Abstract: There is provided a catalytic system including a fibrous hydrophobic substrate, a first layer having a first layer thickness including copper or copper alloy nanoparticles covering the polymeric substrate, and a second layer having a second layer thickness over the first layer and including amorphous nitrogen-doped carbon, wherein the catalytic system includes confined interlayer spaces defined by regions where the first layer and the second layer are spaced apart from each other. The catalytic system can be used for catalyzing the electrochemical reduction of carbon dioxide, carbon monoxide, or a combination thereof. Thus, there is also provided a method for the electrochemical reduction of carbon dioxide, carbon monoxide, or a combination thereof, using the catalytic system.

Abstract: The invention relates to a catalyst system for catalyzing conversion of carbon dioxide into multi-carbon compounds comprising a boron-doped copper catalytic material and associated methods.

Abstract: The invention provides an electrocatalyst and a method of preparing a metal catalyst material comprising in-situ electrodeposition of the catalytic metal in the presence of CO2 and/or CO under electroreduction conditions, wherein the catalytic metal comprising copper (Cu) or silver (Ag) is electrodeposited onto a substrate comprising a gas diffusion layer and wherein the gas diffusion layer includes a metal seed layer disposed thereon, so that the catalytic metal is electrodeposited as an active catalyst layer onto the metal seed layer.

Abstract: Described herein are techniques for converting carbonate in a carbonate loaded solution into syngas or C2+ products within an electrolysis cell that includes a cathodic compartment, an anodic compartment and preferably a bipolar membrane separating the compartments. The carbonate ions are converted in situ by reaction with protons generated by the bipolar membrane to produce CO2 that is in turn electrocatalytically converted into the product. The electrolysis cell can be coupled to an air or flue gas capture system that produces the carbonate loaded solution, and the depleted solution released by the electrolysis cell can be recycled back into the capture system and the feed of the electrolysis cell. The cathode can include a porous substrate that is hydrophilic, and a catalyst metal deposited on the substrate can be Cu, Ag or an alloy depending on the target product.