A process for producing an eggshell catalyst, comprising the coating of the outer surface of a geometric shaped support body with a catalytically active multielement oxide or a powder P, wherein the powder P, after being coated, is converted by thermal treatment to a catalytically active multielement oxide, and one or more liquid binders, wherein the coating is conducted in a horizontal mixer and the Froude number during the coating in the horizontal mixer is from 0.0160 to 0.1200.

A catalyst for production of carboxylic acid ester, containing: catalyst metal particles; and a support supporting the catalyst metal particles, wherein a bulk density of the catalyst for production of carboxylic acid ester is 0.50 g/cm.sup.3 or more and 1.50 g/cm.sup.3 or less, when a particle diameter, at which a cumulative frequency is x % in a particle diameter distribution based on a volume of the catalyst for production of carboxylic acid ester, is defined as D.sub.x, D.sub.10/D.sub.50?0.2 and D.sub.90/D.sub.50?2.5 are satisfied, and when a half-width of the particle diameter distribution is defined as W, W/D.sub.50?1.5 is satisfied.

The present invention relates to a photocatalyst nanomaterial comprising a solid substrate and a metal oxide/oxyhydroxide arranged on the solid substrate forming a coating having a thickness comprised between 1 nm and 1 micrometer and having an amorphous structure. The invention also relates to a nanometric coating which comprises the described photocatalyst material and metallic nanoparticles, as well as to the method for obtaining the catalyst material, to the use of the catalyst material as a photocatalyst in the ultrafast synthesis of metallic nanoparticles, and to the use of the nanometric coating in the manufacture of optical sensors, biocidal coatings and elimination of reactive oxygen species.

A lanthanum oxycarbonate catalyst, and a preparation method therefor and an application thereof are provided. The lanthanum oxycarbonate catalyst contains a rod-shaped lanthanum oxycarbonate catalyst and a nearly parallelogram lanthanum oxycarbonate catalyst. The lanthanum oxycarbonate catalyst can be used for efficiently performing a methane oxidative coupling reaction at a relatively low temperature.

There are provided an easily producible catalyst particle-holding structure used for production of carbon nanotubes, and a method for producing the same. The method for producing the catalyst particle-holding structure of the present invention used for production of carbon nanotubes includes a step of forming a catalyst particle forming layer containing Si, Al, and Fe, and a step of performing a heat treatment on the catalyst particle forming layer in an atmosphere containing oxygen, to form catalyst particles containing Fe. The catalyst particles are held by the catalyst particle forming layer so that the catalyst particles are partially embedded in the catalyst particle forming layer. The size and the number of the catalyst particles containing Fe are controlled by adjusting the amount of oxygen contained in the atmosphere for the heat treatment. Thus, the catalyst particle-holding structure is formed easily.

A device and method for producing a thin-film catalyst are provided. The device includes a vacuum chamber, a plurality of evaporators, a plurality of gas guide pipes, an ion generator, and a control unit. The plurality of evaporators are configured to evaporate at least one film material. The plurality of gas guide pipes are configured to introduce a reactive gas. The ion generator is configured to ionize the reactive gas and the evaporated film material. The control unit is configured to control the vacuum chamber to be vacuumed, control at least two evaporators of the plurality of evaporators to be simultaneously started, control the plurality of gas guide pipes to introduce the reactive gas, and control an ion source current of the ion generator to be adjusted, such that the evaporated film material reacts with the reactive gas to form a catalytic film layer on a surface of a substrate.

A photocatalyst in the form of chloroplast-like heterostructures of Bi.sub.2S.sub.3ZnS is disclosed. Additionally, methods for producing the chloroplast-like heterostructures of Bi.sub.2S.sub.3ZnS with controlled morphology, as well as methods for the photocatalytic production of hydrogen gas under visible light irradiation employing the chloroplast-like heterostructures of Bi.sub.2S.sub.3ZnS are disclosed.

A method of forming a patterned metal unit on an article. The method includes the steps of: providing an article that has an insulating surface; transferring a catalyst layer onto the insulating surface of the article, the catalyst layer including a catalytic material; removing a part of the catalyst layer to form a patterned catalyst layer; and forming a patterned metal layer on the patterned catalyst layer by an electroless plating technique to obtain a patterned metal unit that is constituted by the patterned catalyst layer and the patterned metal layer.

Embodiments of the present disclosure provide for IrO.sub.2 catalysts, methods of making IrO.sub.2 catalysts, methods of using IrO.sub.2 catalysts to make methanol, formaldehyde, and/or ethylene from CH.sub.4, systems for using IrO.sub.2 catalysts, and the like.

A method of forming a patterned metal unit on an article. The method includes the steps of: providing an article that has an insulating surface; transferring a catalyst layer onto the insulating surface of the article, the catalyst layer including a catalytic material; removing a part of the catalyst layer to form a patterned catalyst layer; and forming a patterned metal layer on the patterned catalyst layer by an electroless plating technique to obtain a patterned metal unit that is constituted by the patterned catalyst layer and the patterned metal layer.