Supported catalyst nanocolloid mill

For electrocatalytic reactions, the hydrogen evolution reaction (HER) and oxygen reduction reaction (OER) have become increasingly important in promising clean energy technologies such as metal air batteries, fuel cells, and water separation devices. However, the sluggish dynamics of HER and OER severely constrain the development of clean energy technologies. Therefore, it is highly necessary to manufacture active electrocatalysts that can enhance catalytic efficiency by increasing the overpotential of HER. In order to improve the electrochemical performance of energy conversion devices, especially fuel cells and metal air batteries, developing low-cost non precious metal bifunctional electrocatalysts with high electrocatalytic performance is crucial for both HER and OER.

In order to avoid the aggregation of nanoparticles and the decrease in catalytic activity, the development of new carbon supports to promote the electrochemical performance of catalysts has also attracted increasing attention. Carbon materials such as carbon nanotubes (CNTs), carbon nanofibers (CNFs), carbon nanocoils, ordered mesoporous carbons (OMCs), and graphene have sequential structures and high conductivity, which can significantly improve the performance of Pt based catalysts.

Layered nanomaterials with excellent structural stability, electrical properties, and strong interface coupling were prepared by assembling a small amount of layered MoS2 nanosheets coated with carbon onto carbon stable Ti3C2MXene, exhibiting excellent HER (hydrogen evolution reaction) performance, positive initial potential, low overpotential, and long-term stability in acidic solutions. The mixed material of 1,4-dicarboxylate and Ti3C2Tx nanosheets was applied to an OER with a current density of 10mA cm-2 using mutual diffusion assisted method, with a potential of 1.64V and a Tafel slope of 48.2mV dec-1 relative to the reversible electrode in 0.1M KOH. Due to the effective synergistic effect between Ti2C and g-C3N4, a novel photocatalyst composed of two-dimensional titanium carbide (Ti2C) and graphite carbon nitride (g-C3N4) was synthesized to enhance water * * activity. These studies indicate that Ti3C2Tx nanosheets loaded with electrocatalytic active components exhibit better electrocatalytic performance compared to the original Ti3C2Tx nanosheets.

Preparation method of a supported catalyst, including the following steps:

Provide a mixed dispersion of carrier and catalyst precursor in a solvent; The mixed dispersion is irradiated with plasma to obtain; The solvent comprises an oxygen source solvent and water, wherein the oxygen source solvent is an alcohol compound; The catalyst precursor is a water-soluble transition metal compound.

The preparation method of the mixed dispersion liquid comprises: dissolving the catalyst precursor in water to prepare a catalyst precursor solution; Disperse the carrier in an oxygen source solvent to obtain a carrier dispersion liquid; Mix the carrier dispersion with the catalytic precursor dispersion to obtain.

High speed shear homogenizer is mainly used to process a large number of ultra-fine suspended lotion. Due to the simultaneous use of three homogeneous heads (rotor and stator) for processing, a very narrow particle size distribution can be obtained, resulting in smaller droplets and particles, and thus better stability of the generated mixture. The dispersing head is easy to replace and suitable for various applications. Different machines have the same rotational speed and shear rate, which facilitates scale expansion. Compliant with CIP and SIP cleaning standards, therefore particularly suitable for food and pharmaceutical production

High rotational speed and shear rate are crucial for obtaining ultrafine suspensions. According to some industry specific requirements, Xide Company has developed the XRS2000 ultra high speed shear homogenizer on the basis of the XR2000 series. Its shear rate can exceed 13000 rpm, and the rotor speed can reach 40m/s. Within this speed range, turbulence caused by shear forces combined with specially developed motors can reduce the particle size range to the nanometer level. The shear force is stronger, and the particle size distribution of lotion is narrower. Due to its extremely high energy density, no other auxiliary dispersing equipment is required.

The disperser adopts a German Bergmann double end mechanical seal, which can operate continuously for 24 hours while ensuring cooling water. However, it is difficult for ordinary emulsifiers to operate continuously for a long time, and ordinary emulsifiers cannot withstand high-speed operation. It can handle large amounts, operate more smoothly, and is more convenient, suitable for industrial online continuous production. The particle size distribution range is narrow, the dispersion effect is good, and there are no dead corners. The material * * * is dispersed and sheared.

Grinding and dispersing machine is a high-tech product composed of colloid grinding and dispersing machines.

The first level consists of three-level sawtooth protrusions and grooves with increasing precision. The stator can be infinitely adjusted to the desired distance between the rotors. Under enhanced fluid turbulence. The groove can change direction at each level.
The second stage is composed of a stator. The design of the dispersing head also effectively meets the needs of substances with different viscosities and particle sizes. The difference in the design of the stator and rotor (emulsifying head) between online and batch machines is mainly due to the requirements for conveying performance. It is particularly important to note that the difference between coarse precision, medium precision, fine precision, and other types of working heads is not only the arrangement of specified rotor teeth, but also an important difference in the geometric characteristics of different working heads. The width of the slot and other geometric features can alter the different functions of the stator and rotor working heads.

The following is a model table for reference:

Supported catalyst nanocolloid mill