Abstract: Disclosed is a single process for producing hydrogen, carbon monoxide, and carbon from methane by forming gas products comprising hydrogen and carbon monoxide, and solid products comprising carbon and an iron-based catalyst from methane in a methane-containing feedstock through pyrolysis route involving auto-thermal reduction in a rotary kiln-type reactor in the presence of an iron-based catalyst and separating and recovering respective products.

Abstract: Disclosed techniques and solutions can provide improved snapshot replication. Typically, an initial replica obtained using snapshot replication is periodically updated. However, the update process can unnecessarily consume computing resources if data in a source data object has not changed with respect to data in a replica data object. Disclosed techniques check to determine whether a snapshot replica is out of date before obtaining a new snapshot. The checks can be performed on manual request or on the occurrence of triggers, such as receiving a query that accesses the replica data object or according to a schedule. Information for current and prior versions of the remote data object can be compared to determine whether a replica is out of date, such as digest values of contents of the remote data object or timestamps associated with the remote data object.

Abstract: Provided are a metal-aqueous battery and a hydrogen generation and carbon dioxide storage system including the same. The metal-aqueous battery may include a double cell. The double cell may include a pair of single cells. Each of the single cells include an anode, a cathode, a separator interposed between the anode and the cathode, and a cathode spacer interposed between the separator and the cathode and configured to form a gap between the separator and the cathode. The double cell may also include a current collector interposed between the pair of single cells such that cathodes of the single cells face each other across the current collector.

Abstract: The present disclosure relates to a sulfide-based solid electrolyte having a new composition and a new crystal structure.

Abstract: A battery SOH estimating apparatus according to an embodiment of the present disclosure includes a SOH estimating unit configured to estimate a first SOH of a battery based on the measured voltage and current of the battery; a SOC change calculating unit configured to calculate a SOC change region and a SOC change amount of the battery based on the measured voltage; a weight calculating unit configured to calculate a weight based on a SOC region factor calculated by comparing the SOC change region with a preset criterion SOC region, a SOC change amount factor based on the SOC change amount, and a temperature factor based on the measured temperature of the battery; and a SOH correcting unit configured to correct the first SOH according to the calculated weight and a preset second SOH.

Abstract: An electrode catalyst is configured such that non-noble metal particles, noble metal particles or nitride-doped noble metal particles are supported on a carbon support, wherein the carbon support has a 2D planar crystal structure or a 3D polyhedral crystal structure and is doped with nitrogen, thereby exhibiting increased catalytic activity.

Abstract: An electrode catalyst is configured such that non-noble metal particles, noble metal particles or nitride-doped noble metal particles are supported on a carbon support, wherein the carbon support has a 2D planar crystal structure or a 3D polyhedral crystal structure and is doped with nitrogen, thereby exhibiting increased catalytic activity.

Abstract: A rechargeable metal battery with an improved efficiency, and a hydrogen generation and carbon dioxide storage system equipped with the same battery. A metal battery according to one embodiment includes an electrode unit including a metal electrode, a discharging unit disposed on a first side of the electrode unit; a charging unit disposed on a second side of the electrode unit, a first ion exchange membrane interposed between the electrode unit and the discharging unit, and a second ion exchange membrane interposed between the electrode unit and the charging unit.

Abstract: An electrode catalyst is configured such that non-noble metal particles, noble metal particles or nitride-doped noble metal particles are supported on a carbon support, wherein the carbon support has a 2D planar crystal structure or a 3D polyhedral crystal structure and is doped with nitrogen, thereby exhibiting increased catalytic activity.

Abstract: A metal-carbon dioxide battery includes an anion exchange membrane. The metal-carbon dioxide battery includes an anode, a cathode, the anion exchange membrane located between the anode and the cathode, a first supply unit configured to provide a first electrolyte to the anode, and a second supply unit configured to provide a second electrolyte including protons and bicarbonate ions to the cathode.

Abstract: Systems and methods include storage of a plurality of encrypted data pages of a row store database table in a persistent storage system, determination of a first encryption key associated with one of the plurality of encrypted data pages based on a header of the one of the plurality of encrypted data pages, determination of whether the first encryption key has been revoked, and, if it is determined that the first encryption key has been revoked, adding of a portion of volatile memory allocated to the one of the plurality of data pages to a free list.

Abstract: A hydrogen generation and carbon dioxide storage system is capable of selectively dissolving and storing carbon dioxide contained in a mixed gas such as steel byproduct gas, exhaust gas, or the like. The system includes: a metal-carbon dioxide battery with an anode, a cathode, and a separator between the anode and the cathode; a first supply unit to supply a first electrolyte to the anode; a second supply unit to supply a second electrolyte to the cathode; a separation unit to separate hydrogen gas from a product discharged from the cathode; and a dissolution unit downstream of the separation unit to prepare a precursor by receiving a starting material and dissolving carbon dioxide in the starting material.

Abstract: A catalyst for a fuel cell includes: a crystalline carbon support having a specific surface area of about 200 m2/g to about 500 m2/g; and intermetallic active particles of a transition metal and a noble metal, wherein the intermetallic active particles are supported on the crystalline carbon support and have a particle diameter of greater than or equal to about 3 nm.

Abstract: A hydrogen generation and carbon dioxide storage system for producing an alkali bicarbonate is provided. The system may include: a metal-carbon dioxide battery comprising an anode, a cathode, and a separator interposed between the anode and the cathode; a first supplier configured to provide a first electrolyte to the anode; a second supplier configured to provide a second electrolyte to the cathode; a reaction unit configured to manufacture a precursor material by reacting starting materials comprising aqueous alkali carbonate solution and carbon dioxide; a third supplier configured to provide the aqueous alkali carbonate solution to the reaction unit; a fourth supplier configured to provide the carbon dioxide to the reaction unit; and a hydrogen gas separator configured to separate hydrogen gas from a product discharged from the cathode and to provide a remainder of the product to the reaction unit.

Abstract: Systems and methods include determination of a first encryption key associated with a data page of a row store database table stored in a volatile memory, based on a header of the data page, encryption of a body of the data page using the first encryption key, and storage of an encrypted data page comprising the header and the encrypted body in a persistent storage system.

Abstract: A fuel electrode for a solid oxide electrolysis cell (SOEC) with improved high-temperature electrolysis efficiency includes a carrier having a first particle including nickel, and a second particle comprising yttria-stabilized zirconia, and a catalyst having a first element including at least one selected from the group consisting of Fe, Co, Pd, Cu, Mo, and combinations thereof, and a second element comprising gadolinia-doped ceria.

Abstract: Disclosed is an ionomer for a high-temperature polymer electrolyte membrane fuel cell, which includes a phosphorus (P)-containing functional group having proton conductivity and partially contains fluorine in the main chain thereof.

Abstract: A battery SOH estimating apparatus according to an embodiment of the present disclosure includes a SOH estimating unit configured to estimate a first SOH of a battery based on the measured voltage and current of the battery; a SOC change calculating unit configured to calculate a SOC change region and a SOC change amount of the battery based on the measured voltage; a weight calculating unit configured to calculate a weight based on a SOC region factor calculated by comparing the SOC change region with a preset criterion SOC region, a SOC change amount factor based on the SOC change amount, and a temperature factor based on the measured temperature of the battery; and a SOH correcting unit configured to correct the first SOH according to the calculated weight and a preset second SOH.

Abstract: The embodiments herein provide for an oxygen/air cathode that includes metal-organic frameworks and/or hybrids of metal-organic frameworks and carbon networks. The metal-organic-framework-based Li—O2 cells are operated in humid O2 where water plays a critical role in improving battery performance. Such embodiments not only improve battery performance but also reduces the cost by cycling the Li—O2 batteries in humid oxygen with MOF@CNT hybrid catalysts.

Abstract: Provided is a method of preparing an intermetallic catalyst which includes applying ultrasonic wave to a precursor mixture solution including a noble metal precursor, a transition metal precursor, and a carbon support having an average pore size of about 6 nm to about 15 nm and a specific surface area of about 200 m2/g to about 2000 m2/g to form alloy particles in pores of the carbon support, and annealing the alloy particles in the pores of the carbon support to form intermetallic alloy particles.