A process for the hydrogenation of a polyunsaturated compound contained in a hydrocarbon feedstock in the presence of a catalyst comprising a porous support and an active phase comprising a group VIII metal, said catalyst being prepared according to the following steps: a) an organic compound containing oxygen and/or nitrogen, but not comprising sulfur, is added to the porous support; b) said porous support is brought into contact with a solution containing a salt of a precursor of the active phase; c) the porous support obtained at the end of step b) is dried;
characterized in that step a) is carried out before or after steps b) and c) and is carried out by bringing together said porous support and said organic compound under conditions of temperature, pressure and duration such that a fraction of said organic compound is transferred in the gaseous state to the porous support.

This invention discloses one kind of co-doped carbon composite material with transition metal and nitrogen for removal of formaldehyde and its preparation method. The materials are composed of non-noble metals as active components and nitrogen-doped carbon carrier; The non-noble metal active components are transition metal salts of nickel, cobalt, iron and manganese or their mixtures. The carbon composite materials reported in this invention have high specific surface area and strong adsorption and catalytic decomposition performance for formaldehyde, and harsh conditions (e.g. high reaction temperature etc.) are not required for catalytic oxidation of formaldehyde. It also features in low cost, high catalytic efficiency at room temperature and long durability etc.

This application relates to preparation of mono and bimetallic group V, VI, and VII containing carbide catalysts and the methods of using the carbide catalysts in hydroprocessing applications. A method of producing a carbide catalyst comprising: depositing a precursor metal, an acid or an amine, and an organic compound on a support thereby forming an impregnated support, wherein the organic compound has a carbon number of 10 or greater; and carbonizing the impregnated support thereby forming a carbide phase on the support.

Carbon-based single metal atom or bimetallic, trimetallic, or multimetallic alloy transition metal-containing catalysts derived from exoelectrogen bacteria and their methods of making and using thereof are described. The method comprising the steps of: (a) preparing a solution medium comprising at least an electron donor and an electron acceptor comprised of one or more salts of a transition metal; (b) providing exoelectrogen bacterial cells and mixing the exoelectrogen bacterial cells into the solution medium of step (a); (c) incubating the solution medium of step (b); (d) isolating the exoelectrogen bacterial cells from the incubated solution medium of step (c); and (e) pyrolyzing the exoelectrogen bacterial cells resulting in formation of the catalyst. The electron donor can be formate, acetate, or hydrogen.

A metal/α-MoC.sub.1-x load-type single-atomic dispersion catalyst, a synthesis method therefor, and applications thereof. The catalyst uses α-MoC.sub.1-x as carrier, and has metal that has the mass fraction ranging from 1-100% and that is dispersed on carrier α-MoC.sub.1-x in the single atom form. The catalyst provided in the present application can be adapted to a wide alcohol/water proportion in hydrogen production based on aqueous-phase reforming of alcohols, outstanding hydrogen production performance can be obtained at a variety of proportions, and catalysis performance of the catalyst is much higher than that of metal loaded with an oxide carrier. Especially when the metal is Pt, catalysis performance of the catalyst provided in the present application in the hydrogen production based on aqueous-phase reforming of alcohols is much higher than that of a Pt/α-MoC.sub.1-x load-type catalyst on the α-MoC.sub.1-x carrier on which Pt is disposed on a layer form in the prior art. The hydrogen production performance of the catalyst provided in the present application can be higher than 20,000 h.sup.−1 at the temperature of 190° C.

A nanofibrous catalyst for in the electrolyzer and methods of making the catalyst. The catalysts are composed of highly porous transition metal carbonitrides, metal oxides or perovskites derived from the metal-organic frameworks and integrated into a 3D porous nano-network electrode architecture. The catalysts are low-cost, highly active toward OER, with excellent conductivity yet resistant to the oxidation under high potential operable under both acidic and alkaline environments.

Disclosed are compositions, processes, and methods directed to mesoporous carbon nitride materials having high nitrogen content. The mesoporous carbon nitride material has a three dimensional C.sub.3N.sub.5 3-amino-1,2,4-triazole based mesoporous carbon nitride matrix having an atomic nitrogen to carbon ratio of 1.4 to 1.7, and a band gap of 1.8 to 3 eV.

A method of preparing a mesoporous carbon composite material having a mesoporous carbon phase and preformed metal nanoparticles located within the mesoporous carbon phase. The present invention also relates to a mesoporous carbon composite material and to a substrate having a film of such mesoporous carbon composite material.

A method of synthesizing a doped carbonaceous material includes mixing a carbon precursor material with at least one dopant to form a homogeneous/heterogeneous mixture; and subjecting the mixture to pyrolysis in an inert atmosphere to obtain the doped carbonaceous material. A method of purifying water includes providing an amount of the doped carbonaceous material in the water as a photocatalyst; and illuminating the water containing the doped carbonaceous material with visible light such that under visible light illumination, the doped carbonaceous material generates excitons (electron-hole pairs) and has high electron affinity, which react with oxygen and water adsorbed on its surface forming reactive oxygen species (ROS), such as hydroxyl radicals and superoxide radicals, singlet oxygen, hydrogen peroxide, that, in turn, decompose pollutants and micropollutants.

The invention provides a catalyst and a method for making the catalyst. The catalyst comprises a porous carbon composite impregnated with a salt. The catalyst comprises a porous carbon composite impregnated with a salt.