The core of hydrogen evolution materials is catalysts. The traditional platinum catalysts have strong catalytic performance. They have always been the dominant materials in this field. The shortcoming is that platinum metals are too expensive and can produce toxic by-products. Therefore, it is of great significance to find hydrogen evolution materials with low overpotential, low cost, high earth content and large-scale synthesis.

With the rapid development of industry, more and more attention has been paid to the treatment of water pollution. Bi₂WO₆ tungstate is a narrow bandgap semiconductor (about 2.7eV), which can absorb part of visible light. Bi₂WO₆ is a widely used photocatalytic material for visible light response. It is widely used for photocatalytic degradation of organic dyes, drugs, heavy metals and other pollutants.

Tungsten carbide cemented carbide has a series of excellent properties, such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which remain basically unchanged even at 500 ℃ and still have high hardness at 1000 ℃.

Tungsten carbide cemented carbide has a series of excellent properties, such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which remain basically unchanged even at 500 ℃ and still have high hardness at 1000 ℃.