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Application of Cobalt Boride Powder

Cobalt boride is an inorganic compound with the general formula CoxBy. There are two main types of cobalt boride CoB and Co2B. Cobalt boride is a compound with excellent oxidation resistance and can be used for high corrosion resistance and wear resistance on the surface of metal parts. It is a kind of coating, which acts as a catalyst in hydrogen storage and fuel cell technology.

 

Cobalt boride

Purpose of Cobalt boride powder:

1. Amorphous Co-B is a new type of material with short-range order and long-range disorder structure, which belongs to metastable state in thermodynamics. At present, Co-B powder has been widely used as catalyst for hydrogenation reaction and on-site hydrogen production reaction because of its good catalytic activity, hydrogenation activity and hydrogenolysis activity. The carrier can disperse the catalyst components on the surface of the carrier, obtain a higher specific surface area, and improve the  catalytic efficiency of active components per unit mass. Therefore, on the one hand, the carrier needs to have appropriate shape and mechanical strength, on the other hand, it also needs to have good inertia, that is, the carrier cannot react with the catalyst 

or raw materials. Obviously, using crystalline Co-B powder with porous structure as the support of amorphous Co-B catalyst has more advantages in chemical compatibility than other supports.
2. Bismuth vanadate film photoelectric anode modified by cobalt borate is used for Photoelectrochemical decomposition of water The photocurrent of bismuth vanadate film photoanode modified by cobalt borate is 23 times higher than that of single BiVO film
3. Cobalt borate (co2b) can be used as a catalyst for sodium borohydride to generate hydrogen in proton exchange membrane fuel cells.
4. It can be used for high corrosion resistance and wear resistance coating on the surface of metal parts.
Production process:
1. A new method for preparing crystalline transition metal boride cob by solid-state reaction of cobalt oxide or hydroxide and boron hydride. The method of the invention: after the oxide or hydroxide of cobalt and boron hydride are mixed evenly according to the molar ratio of 1:1-1:1.5, the tablet is pressed under the pressure of 15-20mpa, and the insulation is maintained for 6-24h under the protection of 400-800 degrees argon, and then it is slowly cooled to room temperature; The obtained product is fully washed with deionized water and ethanol and vacuum dried to obtain the product cob.
2. After mixing element boron and element cobalt in proportion, it is formed under pressure and heated in a heating furnace.