39results about How to "Improve oxygen production performance" patented technology

The invention discloses a Co-containing 4 o 4 The preparation method and application of the cobalt-based metal-organic framework catalyst of the quasi-cubane structure, the present invention uses the triphenylamine carboxylic acid derivative L containing the azo functional group as the bridging ligand, and the Co in the transition metal salt Tm 2+ As metal nodes, Co-containing 4 o 4 The three-dimensional metal-organic framework compound Tm-L with a quasi-cubane structure, the metal-organic framework Tm-L not only simulates the natural oxygen-generating active center in structure, but also realizes the heterogeneity of homogeneous catalysts; at the same time, azotriphenylamine-derived carboxylic acid The hydrophobicity of the ligand and its relationship with Co 4 o 4 The semi-open space composed of clusters can ensure the water stability of the catalyst while enhancing the entry of water molecules and the contact with the catalytic active sites. The experiments of heterogeneous photocatalytic water splitting for oxygen and hydrogen production show that the metal-organic framework material Tm-L involved in the present invention is a good bifunctional cocatalyst and has a good application prospect in the field of photocatalytic water splitting.

The invention provides a preparation method for similarly coralloid NiSe@NC. The preparation method comprises the following steps that S1, 4,4'-dipyridyl, trimesinic acid and nickel nitrate are dissolved in N,N-dimethylformamide sequentially, after stirring is conducted for 35 minutes at room temperature, the temperature is increased to 120-130 DEG C at the rate of 5-10 DEG C, thermal reaction isconducted for 60-70 h, and Ni-MOFs are obtained; and S2, selenium powder and the Ni-MOFs are heated to 500-800 DEG C at the rate of 1-5 DEG C / min at the argon atmosphere, and after 1-3 h of heat preservation, the similarly coralloid NiSe@NC is obtained. Compared with the prior art, the preparation method has the following beneficial effects that the metal organic frameworks with nickel as the center serve as the precursor, through a one-step in-situ selenylation strategy, the coralloid NiSe@NC is obtained, then the structure can provide abundant catalytic active sites, good electrocatalysis hydrogen production and oxygen production performance is shown, 60 and 320 mV overpotential and 53 and 101 mV dec<-1> Tafel slope are achieved, and the similarly coralloid NiSe@NC can serve as a bifunctional electrocatalyst for electrolysis hydrogen evolution and oxygen evolution.

In-situ growth of W on the surface of a carbon cloth 18 o 49 The preparation method of the self-supporting electrode material, the analytical pure tungsten source is added to the mixed alcohol to obtain the solution A, and the analytical pure ethylenediamine and citric acid are added to the solution A to obtain the solution B; the solution B is poured into the polytetrafluoroethylene lined with high pressure Put the carbon cloth in the reaction kettle and put the carbon cloth into the polytetrafluoroethylene reaction kettle; put the sealed reaction kettle into the homogeneous hydrothermal reaction apparatus for hydrothermal reaction; wash the final reactant with absolute ethanol and centrifuge The washed material was dried to obtain in-situ growth of W on the surface of the carbon cloth 18 o 49 Self-supporting electrode material. Due to the high abundance and low price of carbon cloth, it has a large specific surface area, high electronic conductivity and ideal 3D open-pore structure. The present invention proposes to use carbon cloth as a supporting material, and adopts a solvothermal method to convert W 18 o 49 In situ growth on the support, the preparation of W with good electrocatalytic performance 18 o 49 / Carbon cloth nanomaterials.