Catalytic pyrolysis can upcycle waste, e.g., car bumpers, to carbon nanomaterials, preferably using synthetic TiO.sub.2 nanoparticles as catalyst during pyrolysis. Analysis of the carbon nanomaterials shows that, while RGO is produced from thermal pyrolysis of car bumper waste absent TiO.sub.2, RGO spotted with carbon dots is produced in presence of TiO.sub.2 catalyst. Rutile to anatase TiO.sub.2 phase transformation and carbon nanomaterial formation can simultaneously occur during the pyrolysis. Anatase to rutile transformation may occur while TiO.sub.2 absent the bumper material. Such TiO.sub.2-CD-RGO can be used, for example in photocatalytic degradation of organic compounds, such as methylene blue.

A metal-supported catalyst, a battery electrode, and a battery. The metal-supported catalyst includes: a carbon carrier; and catalyst metal particles supported on the carbon carrier, wherein a ratio of number-average particle diameter of catalyst metal particles to average pore diameter of metal-supported catalyst is 0.70 or more and 1.30 or less, wherein, at relative pressure of a nitrogen adsorption isotherm of metal-supported catalyst within a range of 0.4 or more and 0.6 or less, maximum value of a ratio of a nitrogen adsorption amount of a desorption-side isotherm to a nitrogen adsorption amount of an adsorption-side isotherm is 1.05 or less, and wherein proportion of number of the catalyst metal particles each supported at a position having a depth of 20 nm or more from an outer surface of the carbon carrier to a total number of the catalyst metal particles supported on the carbon carrier is 11% or more.

Disclosed are a nitrogen-doped hierarchical-porous carbon-loaded nano-Pd catalyst and a preparation method thereof. The preparation method includes preparing nitrogen-doped hierarchical-porous carbon, mixing the nitrogen-doped hierarchical-porous carbon with water, adjusting a pH value of the mixed solution to be alkaline, mixing the mixed solution with a Pd metal precursor aqueous solution, and then adding a reducing agent to obtain the nitrogen-doped hierarchical-porous carbon-loaded nano-Pd catalyst after reduction. The prepared nitrogen-doped hierarchical-porous carbon-loaded nano-Pd catalyst includes a nitrogen-doped porous carbon material carrier with hierarchical pores and Pd metal nanoparticles loaded in the hierarchical pores of the carrier. The Pd metal nanoparticles have a size of 2˜14 nm and a regular polyhedron shape. The nitrogen-doped hierarchical-porous carbon-loaded nano-Pd catalyst has excellent catalytic performance, especially has ultra-high conversion rate, selectivity and cycle stability in the selective hydrogenation reaction of unsaturated ketones, and is a key to open a new synthetic route of vitamin E.

A nanocatalyst for partial oxidation of methane is disclosed. The nanocatalyst is prepared by carbonizing a metal-organic framework coordinated with copper ions to form a structure in which nitrogen atoms present in a nitrogen-doped porous carbon structure form coordinate bonds with copper ions. This structure enhances the chemical stability of the nanocatalyst, prevents the peroxidation of methane at low temperature, and significantly improves the conversion efficiency of methane to liquid products such as methanol and methyl hydroperoxide by selective partial oxidation of methane gas. Also disclosed are a method for preparing the nanocatalyst and a method for partial oxidation of methane using the nanocatalyst.

The present invention relates to a novel process for the preparation of a nitrogen containing biopolymer-based catalyst and to the novel nitrogen containing biopolymer-based catalysts obtainable by this process. In particular, the invention relates to a novel nitrogen containing biopolymer-based catalyst comprising metal particles and at least one nitrogen containing carbon layer. The invention also relates to the use of a nitrogen containing biopolymer-based catalyst in a hydrogenation process, preferably in a process for hydrogenation of nitroarenes, nitriles or imines; in a reductive dehalogenation process of C—X bonds, wherein X is Cl, Br or I, preferably in a process for dehalogenation of organohalides or in a process for deuterium labelling of arenes via dehalogenation of organohalides; or in an oxidation process. Further, the invention relates to a metal complex with the nitrogen containing biopolymer, wherein the metal is a transition metal selected from the group consisting of manganese, ruthenium, cobalt, rhodium, nickel, palladium and platinum, and wherein the nitrogen containing biopolymer is selected from chitosan, chitin and a polyamino acid.

Disclosed is a method for preparing a carbonized silk photocatalyst, comprising; soaking a natural silk and an activator in water, taking out the soaked silk, and drying the same; and roasting the dried silk under the protection of an inert atmosphere to prepare a carbonized silk photocatalyst. Also disclosed is a method for photocatalytic desulfurization of a fuel oil, comprising: mixing a fuel oil to be desulfurated, an extraction agent and a carbonized silk photocatalyst, with air being used as an oxidizing agent, to conduct a photocatalytic reaction under light irradiation, and separating an upper oil phase to obtain a desulfurated fuel oil. The catalyst has a simple preparation process, and can effectively reduce dibenzothiophene sulfides, which are difficult to remove, in the fuel oil under UV light radiation. Desulfurization can be achieved at room temperature, and reaction conditions are mild.

A system and method of ex-situ conditioning an organic treated catalyst composition is disclosed. An example of a method comprises ex-situ conditioning an organically treated catalyst composition by heating the organically treated catalyst composition in a treatment gas flow to form an ex-situ conditioned catalyst composition The ex-situ conditioned catalyst may be further subjected to an ex-situ sulfiding process or may be provided directly to a refinery, where it may undergo in-situ sulfiding.

Provided are a nitrogen-phosphorus-modified granular carbon-supported bimetallic catalyst, a preparation method thereof and the use thereof. The catalyst comprises a nitrogen-phosphorus-modified carbon carrier and metal particles supported on the carbon carrier. The metal particles include first metal elementary substance particles, second metal elementary substance particles and bimetallic alloy phase particles. The percentage of the bimetallic alloy phase particles in the metal particles is ≥80%, and at least 90% of the alloy phase particles have a size of 1 nm to 20 nm. The catalyst has advantages such as a high proportion of alloy phase particles, a uniform particle size distribution, a high metal utilization rate, low costs, high stability and a high catalytic activity.

The present invention relates to a porous iron oxide-zirconia composite catalyst, a preparation method thereof, and a method for producing alcohol using the same, and the iron oxide-zirconia composite catalyst having a porous structure may produce alcohol at low cost by carrying out an excellent methane reforming reaction even under room temperature and room pressure conditions through an electrochemical reaction.

The invention discloses a visible light responsive titanium dioxide nanowire/metal organic skeleton/carbon nanofiber membrane and preparation method and application thereof. A CNF (Carbon Nano Fiber)/TiO.sub.2 nano-wire/MIL-100 (represented as CTWM) membrane material is prepared and an MIL-100 material is used for adsorbing waste gas to enhance the photocatalytic effect of titanium dioxide on the membrane material; a CNF/TiO.sub.2/MIL-100 membrane catalyst sufficiently utilizes the adsorption capability of MIL-100 on the waste gas, the photocatalytic degradation performance of the TiO.sub.2 and high electrical conductivity of CNF to effectively prolong the service life of photoelectrons and promote the photocatalytic activity of the photoelectrons.