The present invention relates to a selective catalytic reduction catalyst for the treatment of an exhaust gas of a diesel engine comprising (i) a flow-through substrate comprising an inlet end, an outlet end, a substrate axial length extending from the inlet end to the outlet end and a plurality of passages defined by internal walls of the flow-through substrate extending therethrough; (II) a coating disposed on the surface of the internal walls of the substrate, where-in the surface defines the interface between the passages and the internal walls, wherein the coating comprises a vanadium oxide supported on an oxidic material comprising titania, and further comprises a mixed oxide of vanadium and one or more of iron, erbium, bismuth, cerium, europium, gadolinium, holmium, lanthanum, lutetium, neodymium, praseodymium, promethium, samarium, scandium, terbium, thulium, ytterbium, yttrium, molybdenum, tungsten, manganese, cobalt, nickel, copper, aluminum and antimony.

The invention provides a process for preparing a cobalt-containing catalyst precursor. The process includes calcining a loaded catalyst support comprising a silica (SiO.sub.2) catalyst support supporting cobalt nitrate to convert the cobalt nitrate into cobalt oxide. The calcination includes heating the loaded catalyst support at a high heating rate, which does not fall below 10° C./minute, during at least a temperature range A. The temperature range A is from the lowest temperature at which calcination of the loaded catalyst support begins to 165° C. Gas flow is effected over the loaded catalyst support during at least the temperature range A. The catalyst precursor is reduced to obtain a Fischer-Tropsch catalyst.

Provided is a method for producing a nitride semiconductor photoelectrode capable of improving the light energy conversion efficiency. The method for producing a nitride semiconductor photoelectrode includes a first step of forming an n-type gallium nitride layer on an insulating or conductive substrate, a second step of forming an indium gallium nitride layer on the n-type gallium nitride layer, a third step of forming a nickel layer n the indium gallium nitride layer, and a fourth step of heat-treating the nickel layer in an oxygen atmosphere.

This disclosure relates to processes for converting saturated polyethylene to at least an alkene product. The processes comprise contacting the saturated polyethylene with three or more catalyst components in a reactor, the reactor comprising an alkene reactant. The three or more catalyst components comprise a metathesis catalyst component, an isomerization catalyst component, and a dehydrogenation catalyst component. Contacting causes at least a portion of the saturated polyethylene to undergo dehydrogenation reactions to form unsaturated polyethylene and at least a portion of the unsaturated polyethylene, or products derived therefrom, to undergo metathesis reactions and isomerization reactions to produce an effluent comprising at least the alkene product.

The present invention provides an alkaline water electrolysis anode such that even when electric power having a large output fluctuation, such as renewable energy, is used as a power source, the electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a long period of time. The alkaline water electrolysis anode is an alkaline water electrolysis anode 10 provided with an electrically conductive substrate 2 at least a surface of which contains nickel or a nickel base alloy and a catalyst layer 6 disposed on the surface of the electrically conductive substrate 2, the catalyst layer 6 containing a metal composite oxide having a quadruple perovskite oxide structure, wherein the metal composite oxide contains calcium (Ca), manganese (Mn), and nickel (Ni), and has an atom ratio of Ca/Mn/Ni/O of (1.0)/(6.6 to 7.0)/(0.1 to 0.4)/12.0.

The present invention provides an alkaline water electrolysis anode such that even when electric power having a large output fluctuation, such as renewable energy, is used as a power source, the electrolysis performance is unlikely to be deteriorated and excellent catalytic activity is retained stably over a long period of time. The alkaline water electrolysis anode is an alkaline water electrolysis anode 10 provided with an electrically conductive substrate 2 at least a surface of which contains nickel or a nickel base alloy and a catalyst layer 6 disposed on the surface of the electrically conductive substrate 2, the catalyst layer 6 containing a metal composite oxide having a quadruple perovskite oxide structure, wherein the metal composite oxide contains calcium (Ca), manganese (Mn), and nickel (Ni), and has an atom ratio of Ca/Mn/Ni/O of (1.0)/(6.6 to 7.0)/(0.1 to 0.4)/12.0.

The disclosure describes a method of depositing a plurality Ft metal containing nanodots on a catalyst carbon support structure by forming a vapor of Pt(PF3)4, exposing a surface of the catalyst support to the vapor of Pt(PF3)4, purging the surface of the catalyst support with a purge gas to remove the vapor of Pt(PF3)4, exposing the surface of the catalyst support to a second reactant in gaseous form, purging the surface of the catalyst support with a purge gas to remove the second reactant, and repeating these steps to form a plurality of the Pt metal containing nanodots.

The disclosure describes a method of depositing a plurality Ft metal containing nanodots on a catalyst carbon support structure by forming a vapor of Pt(PF3)4, exposing a surface of the catalyst support to the vapor of Pt(PF3)4, purging the surface of the catalyst support with a purge gas to remove the vapor of Pt(PF3)4, exposing the surface of the catalyst support to a second reactant in gaseous form, purging the surface of the catalyst support with a purge gas to remove the second reactant, and repeating these steps to form a plurality of the Pt metal containing nanodots.

The present disclosure discloses an ethylene degradation catalyst and a preparation method and a use thereof.

The present disclosure discloses an ethylene degradation catalyst and a preparation method and a use thereof.