Abstract: Provided herein are membrane electrode assemblies (MEAs) for COx reduction. According to various embodiments, the MEAs are configured to address challenges particular to COx including managing water in the MEA. Bipolar and anion-exchange membrane (AEM)-only MEAs are described along with components thereof and related methods of fabrication.

Abstract: A nitride-based semiconductor device includes a first nitride-based semiconductor layer, a second nitride-based semiconductor layer, a first nitride-based transistor, a second nitride-based transistor, and a thermal resistor. The first nitride-based transistor is disposed over the second nitride-based semiconductor layer and applies the 2DEG region as an own channel. The second nitride-based transistor is disposed over the second nitride-based semiconductor layer and applying the 2DEG region as an own channel. The temperature sensor is disposed over the second nitride-based semiconductor layer and between first and second nitride-based transistors. The temperature sensor is in a strip shape and at least turns twice in a region between first and second nitride-based transistors.

Abstract: Various COx electrolyzer multi-cell architectures are provided, including various frame, flow field, gas diffusion layer, and repeat unit designs that may be particularly useful in the context of multi-cell COx electrolyzer cells.

Abstract: Provided herein are methods for operating carbon oxide (COx) reduction reactors (CRR) and related apparatus. In some embodiments, the methods involve shutting off, reducing, or otherwise controlling current during various operation stages including hydration, break-in, normal operation, planned shut-offs, and extended shutoff or storage periods.

Abstract: A method of forming a gas diffusion layer includes causing, at least in part, a stack of layers to be arranged between compressing surfaces of a press, the stack of layers including a plurality of gas diffusion layers. The method also includes causing, at least in part, the press to apply one or more compression cycles to the stack of layers to reduce a combined, uncompressed thickness of the plurality of gas diffusion layers between about 2% and about 30%.

Abstract: Provided herein are membrane electrode assemblies (MEAs) for COx reduction and carbon dioxide reduction reactors (CRRs) that include MEAs.

Abstract: A system preferably including a carbon dioxide reactor. A method for carbon dioxide reactor control, preferably including selecting carbon dioxide reactor aspects based on a desired output composition, running a carbon dioxide reactor under controlled process conditions to produce a desired output composition, and/or altering the process conditions to alter the output composition.

Abstract: Provided herein are membrane electrode assemblies (MEAs) for COx reduction. According to various embodiments, the MEAs are configured to address challenges particular to COx including managing water in the MEA. Bipolar and anion-exchange membrane (AEM)-only MEAs are described along with components thereof and related methods of fabrication.

Abstract: Systems and methods for increasing the concentration of a desired COx reduction reaction product are described. In some embodiments, the systems and methods include ethylene purification.

Abstract: Disclosed are membrane electrode assemblies having a cathode layer comprising a carbon oxide reduction catalyst that promotes reduction of a carbon oxide; an anode layer comprising a catalyst that promotes oxidation of a water; a polymer electrolyte membrane (PEM) layer disposed between, and in contact with, the cathode layer and the anode layer; and a salt having a concentration of at least about 10 uM in at least a portion of the MEA.

Abstract: Disclosed are membrane electrode assemblies having a cathode layer comprising a carbon oxide reduction catalyst that promotes reduction of a carbon oxide; an anode layer comprising a catalyst that promotes oxidation of a water; a polymer electrolyte membrane (PEM) layer disposed between, and in contact with, the cathode layer and the anode layer; and a salt having a concentration of at least about 10 uM in at least a portion of the MEA.

Abstract: Provided herein are methods for operating carbon oxide (COX) reduction reactors (CRR) and related apparatus. In some embodiments, the methods involve shutting off, reducing, or otherwise controlling current during various operation stages including hydration, break-in, normal operation, planned shut-offs, and extended shutoff or storage periods.

Abstract: A system preferably including a carbon dioxide reactor. A method for carbon dioxide reactor control, preferably including selecting carbon dioxide reactor aspects based on a desired output composition, running a carbon dioxide reactor under controlled process conditions to produce a desired output composition, and/or altering the process conditions to alter the output composition.

Abstract: Methods and/or systems for operating a carbon oxide reduction electrolyzer may involve (a) performing normal operation at the electrolyzer; (b) performing a recovery or protection process including: (i) applying a modified current and/or voltage to the electrolyzer, and (ii) while applying the reverse current to the electrolyzer, flowing a recovery gas to the cathode; and (c) resuming normal operation at the electrolyzer. Applying a modified current and/or voltage may involve applying a short circuit to the electrolyzer, holding the electrolyzer electrodes at open circuit voltage, and/or applying a reverse current to the electrolyzer.

Abstract: Provided herein are methods for operating carbon oxide (COx) reduction reactors (CRR) and related apparatus. In some embodiments, the methods involve shutting off, reducing, or otherwise controlling current during various operation stages including hydration, break-in, normal operation, planned shut-offs, and extended shutoff or storage periods.

Abstract: Various COx electrolyzer cell architectures are provided, including various flow field designs and gas diffusion layer designs that may be particularly useful in the context of COx electrolyzer cells.

Abstract: A system optionally including a carbon oxide reactor. A method for carbon oxide reactor control, optionally including selecting carbon oxide reactor aspects based on a desired output composition, running a carbon oxide reactor under controlled process conditions to produce a desired output composition, and/or altering the process conditions to alter the output composition.

Abstract: A system optionally including a carbon oxide reactor. A method for carbon oxide reactor control, optionally including selecting carbon oxide reactor aspects based on a desired output composition, running a carbon oxide reactor under controlled process conditions to produce a desired output composition, and/or altering the process conditions to alter the output composition.

Abstract: Provided herein are membrane electrode assemblies (MEAs) for COx reduction and carbon dioxide reduction reactors (CRRs) that include MEAs.

Abstract: Systems and methods for increasing the concentration of a desired product in gas phase output streams of COx electrolyzers are described.