According to the embodiments of the present disclosure, an ammonia decomposition catalyst may be prepared by performing heat treatment on alumina, a lanthanum compound and a cerium compound in a reducing gas atmosphere to form a composite oxide on an alumina support, and supporting an active metal including ruthenium on the composite oxide.

A catalyst includes an alumina support, GdFeO.sub.3 distributed on the alumina support, and Fe.sub.2O.sub.3 distributed on the alumina support. The GdFeO.sub.3 is in the form of an orthorhombic perovskite structure with a Pbnm space group, and the Fe.sub.2O.sub.3 is in the form of -Fe.sub.2O.sub.3. Further, the catalyst includes 1 percent by weight (wt. %) to 7 wt. % of Gd and 5 wt. % to 15 wt. % of Fe based on a total weight of the catalyst.

Provided is a catalyst system capable of removing perfluorinated compounds and nitrous oxide. An exhaust gas is heated in two stages through a heat exchange unit and applied to a heater unit. The heater unit generates a flame to heat the exhaust gas to a high temperature. A catalyst unit is directly connected to a heating space of the heater unit so the heated exhaust gas comes into contact with a catalyst, and the perfluorinated compounds and the nitrous oxide are decomposed in the catalyst unit.

The present invention relates to a method for preparing an alumina supported perovskite type oxide composition, to an alumina supported perovskite type oxide composition and to the use of such an alumina supported perovskite type oxide composition in catalytic systems in emission control applications.

The present disclosure relates to a device for accurately measuring photocatalytic efficiency. Additional embodiments of the present disclosure further relate to a method of utilizing the disclosed device, for example, to obtain accurate measurements of photocatalytic efficiency and a photocatalyst compatible with the device in the present disclosure. Application of the present disclosure may include the quantification of photocatalytic light conversion metrics such as in a research environment.

A dehydrogenation reaction catalyst, including a primary phase formed of a perovskite-type oxide represented by a general formula (A.sub.1-xA.sub.x)(Zr.sub.1-y-zB.sub.yB.sub.z)O.sub.3- (in which A represents at least one element selected from alkaline earth metals; A represents at least one element of lanthanum (La) and yttrium (Y); B represents at least one element of titanium (Ti) and cerium (Ce); B represents at least one element selected from among yttrium (Y), scandium (Sc), ytterbium (Yb), aluminum (Al), indium (In), and neodymium (Nd); relationships: 0x0.4, 0.3(1z)1, 0y, and 0<(1yz) are satisfied; and represents an oxygen deficiency), and a secondary phase formed of at least one member of three complex oxides represented by general formulas AB.sub.2O.sub.4, A.sub.2B.sub.2O.sub.5, and A.sub.3B.sub.4O.sub.9, respectively (in which A and B are the same elements as A and B forming the perovskite-type oxide).

A catalyst body for an exhaust gas aftertreatment system includes a first portion having a selective catalytic reduction S(SCR) catalyst member that receives exhaust gas. The SCR catalyst member includes a first end and a second end opposite the first end. The exhaust gas is configured to flow through the SCR catalyst member in a direction from the first end to the second end. The catalyst body further includes a second portion having an oxidation catalyst member. The oxidation catalyst member includes a coating thereon at a location proximate the second end of the SCR catalyst member. The oxidation catalyst member is fluidly coupled to the SCR catalyst member and receives the exhaust gas from the SCR catalyst member via the second end of the SCR catalyst member.

The present invention relates to the field of renewable energy and photocatalysis (e.g. photocatalytic water splitting for hydrogen production), specifically focusing on sulfurized perovskite compounds, perovskite nanosheets, and synthesis method and uses thereof. The present invention relates to perovskite nanosheets comprising LaXO.sub.nS.sub.3-n, wherein X is a metal selected from Fe, Co, Mn, Cu, Zn, or Ni; and wherein 0<n<3. Further, the present invention explores the perovskite nanosheets to improve efficiency, stability, and light absorption in solar-driven hydrogen generation applications. The present perovskite nanosheet enhances visible light absorption, charge carrier mobility, and catalytic activity, making it useful for large-scale hydrogen production.

Disclosed isthe synthesis of novel supported metal catalytic materials for electromagnetic radiation absorption and chemical catalysis especially in the presence of plasma used in the conversion of nitrogen from air and hydrogen from water to useful products such as nitric acid, hydrogen, ammonia and fertilizers. These materials can also generate plasma when subjected to microwave irradiation thus form the basis of catalytic plasma reactors. They can be used in chemical looping reactions because plasma generation under microwave irradiation in air results in the reduction of catalyst oxides and oxidation of nitrogen.

The catalyst for methane reformation according to an exemplary embodiment of the present application consists of a porous metal support; and a perovskite-based catalyst component supported on the porous metal support and represented by Chemical Formula 1:
Sr.sub.1-xA.sub.xTi.sub.1-yB.sub.yO.sub.3-[Chemical Formula 1] wherein all the variables are described herein.