Copper fluoroborate is an inorganic compound with the chemical formula Cu(BO₂)₂, which is made up of copper ions and fluoroborate ions. Copper fluoroborate is a green or yellow solid that is insoluble in water. It is usually prepared by the reaction of copper salts with fluorobonic acid.

Copper fluoroborate has some industrial applications, mainly as a catalyst and corrosion inhibitor. It can be used as a catalyst in some chemical reactions to promote the reaction and improve the yield of the product. In addition, it can also be used for corrosion protection of metals and prolong the service life of metal materials.

1. Catalyst: Copper fluoroborate is commonly used as a catalyst in organic synthesis, especially in cross-coupling reactions such as the Heck reaction, Suzuki-Miyaura reaction, and Negishi reaction. It facilitates the reaction of aryl or vinyl halides with metal compounds to form carbon-carbon bonds.

2. Corrosion inhibitor: Copper fluoroborate can be used in metal surface treatment as a corrosion inhibitor to prevent corrosion and wear of metal.

3. Electroplating solution: In the electroplating process, copper fluoroborate can be used as a part of the electroplating solution to deposit copper layers on the surface of the metal, providing good conductivity and anti-corrosion properties.

4. Fine chemicals: Copper fluoroborate also has applications in the field of fine chemicals, such as as as a catalyst in the pharmaceutical industry or for the synthesis of intermediates.

5. Anode material: In some batteries and capacitors, copper fluoroborate can be used as an electrode material, especially in applications where high conductivity and stability are required.

6. Research and laboratory reagents: In chemical research, copper fluoroborate can be used as a reagent for specific chemical transformations and research.