Cobalt Boride Powder(CoB)
Chinese Name: cobalt borate
English Name: cobalt border
Chemical formula: cob
Melting point: 1460 ° C
Density: 7.250
Color: Black Gray
Appearance: gray black powder
Density: 8.1G /cm3
Molecular weight: 69.74
EINECS No.: 235-722-7
Purpose:
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
componentson 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.
Packaging and storage: sealed and stored in a dry and cool environment, not
exposed to the air, so as to prevent oxidative agglomeration caused by moisture,
which will affect the dispersion performance and use effect