Disclosed are a low-temperature de-NO.sub.x catalyst using a ceria-alumina complex support, and a method of manufacturing the same. According to the present invention, provided is a low-temperature de-NO.sub.x catalyst using a ceria-alumina complex support, manufactured by impregnating noble metal and metal oxides into a ceria-alumina complex support synthesized by treating a ceria precursor and an alumina precursor in a predetermined mass ratio by a co-precipitation method.

An alloy composed of three or more types of elements, wherein all the standard deviation of distribution in the alloy of each element constituting the alloy are 15 atomic % or less provides a novel alloy composed of three or more types of elements and having a high solid solution uniformity.

Methods for preparing ceria-zirconia (CZO) materials calcined with precious group metals (PGM) include calcining a CZO material with PGM. The calcined CZO/PGM catalyst is reduced at a temperature of ≥1000° C. to ≤1100° C. for a time of ≥0.5 hour to 1 hour to form a (CZO/PGM)-pyrochlore catalyst. The (CZO/PGM)-pyrochlore catalyst exhibits superior oxygen storage capacity characteristics as a three-way catalyst in vehicle exhaust gas systems.

Provided herein are compounds, compositions, systems, and methods for photoactivatable labeling, which can be actuated within biological systems. In particular, compounds disclosed herein include vinyl-extended-aryl azide moieties that undergo photoactivation to generate reactive intermediates, which can form covalent linkages with biomolecules. The photoactivation can be conducted by a variety of mechanisms including ultraviolet (UV) irradiation, visible light irradiation, or energy transfer (e.g., from a photocatalyst). The compounds also include functional moieties that provide useful functionalities, for example detection of biomolecules, such as fluorophores, capture elements (e.g., biotin), or reactive moieties (e.g., click handles) and bifunctional moieties comprising a bioactive compound and a detection/capture element.

Provided is a method for manufacturing a single-atom catalyst supported on a carbon support, including treating a mixture of a precursor of a carbon support and a precursor of a hetero element other than carbon through a dry vapor phase process, thereby supporting, on a carbon support, a single-atom catalyst containing a hetero element other than carbon.

This disclosure provides compositions and methods directed to thermally stable catalyst systems, which display stable physical properties and/or stable catalytic properties after thermal pretreatment at a temperature in the range of about 600° C. to about 1000° C. The catalyst systems include metal particles which contain a stable metal and a catalytic metal deposited on a porous support. Embodiments of the disclosure include catalyst systems that can be used in high temperature applications such as the hybrid sulfur cycle. The hybrid sulfur cyclic is an elevated temperature and high acid reaction that may be conducted using concentrated sulfuric acid heated to 800° C. Embodiments of the disclosure can provide thermally stable catalysts and methods to produce thermally stable catalysts that remain active for at least 80 hours' exposure to these harsh conditions.

[PROBLEM] To provide a novel method for synthesising a polyphenol. [SOLUTION] A polyphenol production method including the reaction of catechin in the presence of a catalyst and an oxidising agent, said catalyst comprising a metal oxide and/or a composite that comprises: a substrate which has an inorganic material on the surface thereof; and metal nanoparticles of a particle diameter of 0.5-100 nm attached to the surface of the inorganic material.

A catalyst used for dehydrogenation of an organic hydrogen-storage material to generate hydrogen, a support for the catalyst, and a preparation process thereof are presented. A hydrogen-storage alloy and a preparation process thereof are provided. A process for providing high-purity hydrogen, a high-efficiently distributed process for producing high-purity and high-pressure hydrogen, a system for providing high-purity and high-pressure hydrogen, a mobile hydrogen supply system, and a distributed hydrogen supply apparatus are also described.

Water electrolyzer comprising a membrane having first and second opposed major surfaces, a thickness extending between the first and second major surfaces, and first, second, and third regions equally spaced across the thickness, wherein the first region is the closest region to the first major surface, wherein the second region is the closest region to the second major surface, wherein the third region is located between the first and second regions, wherein the first and third regions are each essentially free of both metallic Pt and Pt oxide, and wherein the second region comprises at least one of metallic Pt or Pt oxide; a cathode comprising a first catalyst on the first major surface of the membrane; and an anode comprising a second catalyst on the second major surface of the membrane.

A catalyst comprising a functionalized substrate having a first charged functional group, a metal dispersed on the substrate, wherein the metal comprises at least one of Pt, Rh, Pd, Ag, Au, Ni, Os, Ir, Mn, Co, alloys thereof, oxides thereof, or mixtures thereof, and an ionomer are disclosed. Methods manufacturing a functionalized catalyst comprising catalyzing a substrate with a metal, functionalizing the catalyzed substrate with a first charged functional group, and add an ionomer to the loaded functionalized catalyst are also disclosed. Also, methods comprising catalyzing a substrate with a metal, functionalizing the substrate with a first charged functional group, and adding an ionomer to the loaded functionalized catalyst are disclosed.