The present disclosure relates to a particle including at least one atomic-scale channel formed on a surface of the particle or on a surface and inside of the particle; a catalyst including the particle, particularly a catalyst for efficient and selective electrochemical conversion of carbon dioxide into high value-added C.sub.2+ fuel; and a method of preparing the particle.

The present invention relates to diesel oxidation catalyst compositions and catalyst articles, wherein the compositions and articles include a plurality of platinum group nanoparticles substantially in fully reduced form, wherein the nanoparticles have an average particle size of about 1 to about 10 nm and at least about 90% of the nanoparticles have a particle size of +/ about 2 nm of the average particle size. Such compositions can further include a refractory metal oxide material, wherein the nanoparticles and refractory metal oxide material can be combined within the same coating on a substrate or can be applied sequentially on a substrate. The nanoparticles can advantageously be substantially free of halides, alkali metals, alkaline earth metals, sulfur compounds, and boron compounds. Methods of preparing and using such compositions and catalyst articles (e.g., for the treatment of diesel exhaust gas streams) are also provided herein.

The present application relates to a multifunctional filter medium and a method of manufacturing the same. The multifunctional filter medium of the present application is capable of significantly reducing fine dust, harmful microorganisms, and toxic gases and reducing a pressure decrease during filtration due to exclusion of high-density nanofiber, thereby minimizing energy required for filtration and exhibiting sufficient filtration performance as a single filter medium.

An electrocatalytic device for carbon dioxide conversion includes a cathode with a Catalytically Active Elementa metal in the form of supported or unsupported particles or flakes with an average size between 0.6 nm and 100 nm. The reaction products comprise at least one of CO, HCO.sup., H.sub.2CO, (HCOO).sup., HCOOH, CH.sub.3OH, CH.sub.4, C.sub.2H.sub.4, CH.sub.3CH.sub.2OH, CH.sub.3COO.sup., CH.sub.3COOH, C.sub.2H.sub.6, (COOH).sub.2, (COO.sup.).sub.2, and CF.sub.3COOH.

The present invention provides a filter comprising a base material and a catalytic substance provided within the base material, wherein the base material comprises a plurality of cells forming gas flow paths and having a gas inflow-side end portion and outflow-side end portion, and a plurality of porous partition walls defining said cells, the end portions of at least some of the cells being closed off, and the void occupancy of the catalytic substance within the pores of the partition walls is 10% or less.

A catalyst article including a substrate with an inlet side and an outlet side, a first zone and a second zone, where the first zone includes an ammonia slip catalyst (ASC) comprising a platinum group metal on a support and a first SCR catalyst; where the second zone includes a catalyst selected from the group consisting of a diesel oxidation catalyst (DOC) and a diesel exotherm catalyst (DEC); and where the first zone is located upstream of the second zone. The first zone may include a bottom layer with a blend of: (1) the platinum group metal on a support and (2) the first SCR catalyst; and a top layer comprising a second SCR catalyst, the top layer located over the bottom layer.

A zeolite catalyst capable of maintaining a high conversion of raw materials over a long period of time, and a method of producing a lower olefin stably over a long period of time using the zeolite catalyst is to be provided.

A CON zeolite catalyst containing aluminum (Al) as a constituent element, wherein the CON zeolite catalyst has a ratio ((A.sub.2/A.sub.1)?100 (%)) of an integrated intensity area (A.sub.2) of signal intensity in a range from 57.5 ppm to 70 ppm to an integrated intensity area (A.sub.1) of signal intensity in a range from 45 ppm to 70 ppm is not less than 49.0% when analyzed by .sup.27Al-MAS-NMR is prepared, and a lower olefin is produced by a MTO process using the zeolite catalyst.

The present invention is concerned with oxygen storage materials. In particular an oxygen storage material (OSM) is proposed which comprises a certain mixed oxide as the oxygen storage component. The oxygen storage material can be used in conventional manner in three-way catalysts or NOx-storage catalysts for example.

Disclosed is a catalytic system for the reduction of carbon dioxide to carbon monoxide. The catalytic system includes an iridium (Ir) photosensitizer and a TiO.sub.2/Re(I) complex catalyst. No additional process is required to anchor the molecule-based dye compound on TiO.sub.2 in the synthesis of the catalytic system. This enables the synthesis of the catalytic system in a relatively easy manner for groups of photosensitizer candidates. In addition, the catalytic system can be utilized as a platform for more easily evaluating the abilities of photosensitizers. Furthermore, the catalytic system can find application in various fields due to its ability to selectively produce carbon monoxide gas with high efficiency.

A nitrous oxide (N.sub.2O) removal catalyst composite is described, which includes: a N.sub.2O removal catalytic material on a carrier, wherein the catalytic material comprises a platinum group metal (PGM) component on a ceria-containing support having a single phase, cubic fluorite crystal structure. The catalytic material is effective to decompose nitrous oxide (N.sub.2O) to nitrogen (N.sub.2) and oxygen (O.sub.2) and/or to reduce N.sub.2O to N.sub.2 and water (H.sub.2O) and/or (CO.sub.2) under conditions of an exhaust stream of an internal combustion engine operating under conditions that are stoichiometric or lean with periodic rich transient excursions. Methods of making and using the same are also provided.