The present invention relates to a catalyst in which a catalytic metal is supported on a support including a single-crystalline hexagonal material, and a preparation method therefor, wherein the catalyst can be effectively used in ammonia dehydrogenation or ammonia synthesis.

The present invention concerns an ammonia production method comprising the steps of: providing at least one rare earth nitride material or layer in a chamber; creating a vacuum or an inert atmosphere in the chamber; and providing hydrogen H.sub.2 to react with nitrogen N released at an external surface of the at least one rare earth nitride material or layer to produce ammonia.

The present disclosure provides a display panel including a substrate, an organic electroluminescent device, and an absorbing layer, wherein the organic electroluminescent device is arranged on the substrate, and the absorbing layer covers the organic electroluminescent device and the substrate. The absorbing layer includes an oxygen absorbing layer and a photocatalytic layer for catalyzing water decomposition, the photocatalytic layer covers the organic electroluminescent device and the substrate around the organic electroluminescent device, and the oxygen absorbing layer is covered on the photocatalytic layer and the substrate around the photocatalytic layer.

The present disclosure provides a display panel including a substrate, an organic electroluminescent device, and an absorbing layer, wherein the organic electroluminescent device is arranged on the substrate, and the absorbing layer covers the organic electroluminescent device and the substrate. The absorbing layer includes an oxygen absorbing layer and a photocatalytic layer for catalyzing water decomposition, the photocatalytic layer covers the organic electroluminescent device and the substrate around the organic electroluminescent device, and the oxygen absorbing layer is covered on the photocatalytic layer and the substrate around the photocatalytic layer.

When a metal catalyst is used as a catalyst in a catalyst layer of a polymer electrolyte fuel cell, improvement in catalytic activity and improvement in durability of the metal catalyst are intended.

The catalyst composition of the present invention comprises a metal catalyst, a carbon material having a nitrogen-containing group on which the metal catalyst is carried, and an ionomer.

When a metal catalyst is used as a catalyst in a catalyst layer of a polymer electrolyte fuel cell, improvement in catalytic activity and improvement in durability of the metal catalyst are intended.

The catalyst composition of the present invention comprises a metal catalyst, a carbon material having a nitrogen-containing group on which the metal catalyst is carried, and an ionomer.

A stable three-dimensional core-shell metal-nitride catalyst consisting of NiFeN nanoparticles decorated on NiMoN nanorods supported on porous Ni foam (NiMoN@NiFeN), which functions as an oxygen evolution reaction catalyst for alkaline seawater electrolysis. It yields large current densities of 500 and 1000 mA cm.sup.−2 at overpotentials of 369 and 398 mV, respectively, in alkaline natural seawater at 25° C. Combined with an efficient hydrogen evolution reaction catalyst of NiMoN nanorods, current densities of 500 and 1000 mA cm.sup.−2 at low voltages of 1.608 and 1.709 V, respectively are achieved for overall alkaline seawater splitting at 60° C.

A method for producing 2,5-furandicarboxylic acid (FDCA) by electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) is provided, where the catalytic oxidation is conducted using an electrolytic cell; the electrolytic cell is a three-electrode electrolytic cell or a two-electrode electrolytic cell; an anode used is a monolithic electrode; the monolithic electrode includes a carrier and a catalytically active substance loaded on the carrier; and the catalytically active substance includes cobaltosic oxide particle-encapsulated nitrogen-doped carbon nanowires. The method has high activity and high selectivity, and the anodic catalyst is highly tolerant to HMF.

A method for manufacturing a lithium ion battery with a capacitance greater than 1 mA h, including the deposition of at least one dense layer, which can be an anode and/or a cathode and/or an electrolyte, by a method of depositing a dense layer. The method includes: supplying a substrate and a suspension of non-agglomerated nanoparticles of a material P; depositing a layer on the substrate using the suspension; drying the layer thus obtained; densifying the dried layer by mechanical compression and/or heat treatment. The method of depositing being characterised in that the suspension of non-agglomerated nanoparticles of material P includes nanoparticles of material P having a size distribution, said size being characterised by the value of D50 thereof, such that: the distribution includes nanoparticles of material P of a first size D1 between 20 nm and 50 nm, and nanoparticles of material P of a second size D2 characterised by a value D50 at least five times less than that of D1, or the distribution has a mean size of nanoparticles of material P less than 50 nm, and a standard deviation to mean size ratio greater than 0.6.

The invention describes metal catalysts such as Pt single-site centers on metal oxide supports, e.g., powdered supports, such as MgO, Al.sub.2O.sub.3, CeO.sub.2 or mixtures thereof with di-nitrogen containing ligands.