A method for preparing copper-solver and copper-gold porous microsheets with specific pore sizes, the method including the steps of providing a solution of copper microsheets and adding a silver or gold solution under controlled temperature, the reaction conditions can be changed to determine pore sizes.

The present disclosure generally relates to a process for preparing a catalytically active scaffold from a scaffold material, and in particular activating a surface of a scaffold by chemically removing sacrificial material from the surface of the scaffold to provide catalytically reactive sites on the surface of the scaffold.

A porous formed body (Y) including a porous formed body (X) that satisfies the following (x-1) to (x-3), and an alkali metal carbonate or an alkali metal bicarbonate, in which a content of the alkali metal carbonate or the alkali metal bicarbonate is in a range of from 1 part by mass to 230 parts by mass, with respect to 100 parts by mass of the porous formed body (X), and a production method thereof, an α-olefin dimerization catalyst and a production method thereof, and a method of producing an α-olefin dimer: requirement (x-1): a volume of pores with a pore diameter in a range of from 0.01 μm to 100 μm is from 0.10 mL/g to 1.00 mL/g; requirement (x-2): a median pore diameter of pores with a pore diameter in a range of from 0.01 μm to 100 μm is from more than 0.01 μm to 10.0 μm; and requirement (x-3): a crushing strength is from 0.7 kgf to 15.0 kgf.

Provided herein are methods for making a freeze-cast material having a internal structure, the methods comprising steps of: determining the internal structure of the material, the internal structure having a plurality of pores, wherein: each of the plurality of pores has directionality; and the step of determining comprises: selecting a temperature gradient and a freezing front velocity to obtain the determined internal structure based on the selected temperature gradient and the selected freezing front velocity; directionally freezing a liquid formulation to form a frozen solid, the step of directionally freezing comprising: controlling the temperature gradient and the freezing front velocity to match the selected temperature gradient and the selected freezing front velocity during directionally freezing; wherein the liquid formulation comprises at least one solvent and at least one dispersed species; and subliming the at least one solvent out of the frozen solid to form the material.

A member for a metal oxide nanofiber based gas sensor can include a metal nanoparticle catalyst and can be formed to be functionalized by binding the metal nanoparticle catalyst and an alkali or alkaline earth metal through electrospinning and heat treatment processes. The member can detect a trace amount of a gas with high selectivity and ultra-high sensitivity by uniformly binding the alkali or alkaline earth metal and the metal nanoparticle catalyst through electrospinning and high-temperature heat treatment.

Catalyst materials comprising iron and palladium are described. Also described are methods for preparing such materials. In addition, methods for remediating materials such as sediments and groundwater using the catalyst materials are described.

A membrane includes a first layer, and a second layer coupled to the first layer. The second layer includes a network of catalytic sites, each catalytic site having a catalytic center characterized by promoting a chemical reaction of a target material. A method of forming a chemically reactive membrane includes applying a first solution to a structure, the first solution includes a macrocyclic ligand having electron-donating ligands and a side functional group for crosslinking, crosslinking a plurality of the macrocyclic ligand to form a first network of crosslinked macrocyclic ligands, and applying a second solution to the structure, the second solution comprising a catalytic center. Each catalytic center complexes with the electron-donating ligands of each macrocyclic ligand to form catalytic sites in the first network of crosslinked macrocyclic ligands.

A supported catalyst for decomposing an organic substance that includes a carrier and catalyst particles supported on the carrier. The catalyst particles contain a perovskite-type composite oxide represented by A.sub.xB.sub.yM.sub.zO.sub.w, where A contains at least one of Ba and Sr, B contains Zr, M is at least one of Mn, Co, Ni, and Fe, y+z=1, x>1, z<0.4, and w is a positive value that satisfies electrical neutrality. An organic substance decomposition rate after the supported catalyst is subjected to a heat treatment at 950° C. for 48 hours is greater than 0.97 when the organic substance decomposition rate before the heat treatment is regarded as 1, and an amount of the catalyst particles peeled off when the supported catalyst is ultrasonicated in water at 28 kHz and 220 W for 15 minutes is less than 1 wt % of the catalyst particles before untrasonication.

An organic matter decomposition catalyst that contains a perovskite type complex oxide represented by A.sub.xB.sub.yM.sub.zO.sub.w, wherein A contains 90 at % or more of at least one element selected from the group consisting of Ba and Sr, B contains 80 at % or more of Zr, M is at least one element selected from the group consisting of Mn, Co, Ni, and Fe, y+z=1, x>1, z<0.4, and w is a positive value that satisfies electrical neutrality.

Embodiments of the present disclosure are directed to a coated hydroprocessing catalyst comprising: a hydroprocessing catalyst comprising a porous support and at least one metal supported on the porous support; wherein the porous support comprising silica, alumina, titania, or combinations thereof; and the at least one metal selected from IUPAC Groups 6, 9 and 10 metals; a catalyst activation agent, a catalyst deactivation agent, or both loaded onto pores of the porous support, the catalyst activation agent comprising at least one sulfur compound and the catalyst deactivation agent comprising at least one nitrogen compound; and a coating layer on a surface of the hydroprocessing catalyst, the coating layer encapsulating the catalyst activation agent, the catalyst deactivation agent, or both within the hydroprocessing catalyst, wherein the coating layer comprises a polymer, or a paraffinic oil.