Recently, Professor Ma Mingming's group at the University of Science and Technology of China has designed a hollow nanosphere formed by the self-assembly of cobalt nanocrystals. It can be used as a catalyst to efficiently catalyze the production of hydrogen in electrolyzed water in neutral aqueous solutions and can be used at high current densities. Long time stable work. The research results were published online on Angew. Chem. Int. Ed. (doi:10.1002/anie.201601367) and were selected as the inside cover. The first author of the thesis was Liu Bingrui, a doctoral student of the research group.

Currently, industrially used electrohydrogen production catalysts for electrolysis use precious metals such as platinum, which are expensive and resource-poor. The use of non-precious metal materials for the preparation of hydrogen electrocatalysts for electrolysis of water has become a research hotspot. However, most of the hydrogen catalysts for electrolytic electrolysis currently need to be used in strong acids or strong alkaline electrolytes, which may bring about some environmental and safety problems. For this reason, the development of high-performance hydrogen-producing electrocatalysts that can work in neutral electrolytes has important application value.

Ma Mingming's group prepared a nano-hollow sphere (Co-HNP) with a diameter of 5-10 nm by self-assembly of cobalt nanocrystals, using a "sacrificial template method", with a layer containing cobalt, tungsten and phosphorus. The composite oxide with boron binds the cobalt nanocrystals together to form a spherical shell and protects the cobalt nanocrystals from oxidation. This nano hollow ball is closely adsorbed on the conductive carbon cloth to form an electrode, which can not only ensure the effective electron transfer between the cobalt nanocrystals and between the cobalt nanocrystals and the carbon cloth, but also maintain the high specific surface area and size of the nanocatalyst. Effect, thus achieving a high catalytic activity of the electrode. On the other hand, due to the presence of the composite oxide protective layer, the catalyst can produce hydrogen in a neutral aqueous solution at a high current density of 150 mA cm-2 for 20 hours without significant inactivation. Under the same conditions, commercial platinum/carbon catalysts have been severely deactivated after 3 hours of hydrogen production. It can be seen that the nano-hollow spherical catalysts based on cobalt nanocrystals have both high activity and high stability in neutral aqueous solutions and are superior to noble metal platinum/carbon catalysts.

This work is of great significance for the design and development of high-performance electrochemical catalysts based on non-precious metal nanocrystals.

The study was funded by the National Natural Science Foundation of China and the Thousand Talents Program of the Central Organization Department.

Scomi Prima 4g Shaker Screen

Steel Frame Shaker Screen for Scomi Prima 4G Shale Shaker

Competitive Advantage

• 100% interchangeable with OEM brands screen panel size.
• SS 304/316 wire mesh cloth, triple layered sandwich construction.
• Bonded to perforated panel, rugged structural support.
• Manufactured according to the API RP 13C (ISO 13501).
• Scientific & reasonable cost control system for competitive price.
• Adequate inventory in the shortest time to meet customers' demand.

Technical Parameter

• Mesh Material: stainless steel 304/316/316 L.
• Frame Material: Q235 steel.
• API RP 13C Designation: API 20 – API 325.
• Screen Type: XL, XR.
• Package: packed in paper carton, shipped by wooden case

SJ-Scomi Prima Shaker Screen, also commonly called Scomi prima 3G/4G/5G screen, refers to the replacement screen for Scomi Prima series shale shakers. The main shaker models are including SCM-PrimaG 3P/4P/5P linear motion shale shaker and SCM-PrimaG 4PDD cascading shale shaker. Screen quantity correspondingly varies by the different shaker models. The whole screen cloth is divided into independent small surfaces by rectangle perforated holes to prevent the part excessive expansive damaged.

Adaptable Shale Shaker Model

SJ-Scomi Prima 4G Shaker Screen are used as the substitute screen for

• SCM-PrimaG 3P linear motion shale shaker (3-panel).
• SCM-PrimaG 4P linear motion shale shaker (4-panel).
• SCM-PrimaG 4PDD cascading shale shaker (4-panel).
• SCM-PrimaG 5P linear motion shale shaker (5-panel).

Remarks:

Scomi, SCM-PrimaG 3P, 4P, 4PDD, 5P are marks of Scomi equipment INC.

ShengJia only produces the replacement screens but not original from Scomi.

Scomi Prima 4g Shaker Screen

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