Catalysts are substances that increase the rate of chemical reactions without being consumed in the process. They play a crucial role in many industrial applications by making reactions faster, more efficient, and less energy-consuming. In the petroleum industry, catalysts are used in refining crude oil to produce valuable products such as gasoline, diesel, and kerosene. In the chemical industry, they are essential for producing ammonia, which is a key component in fertilizers that support agriculture and food production. Catalysts are also widely used in environmental applications, such as reducing harmful emissions from vehicle exhaust systems through catalytic converters. Although catalysts do not change the final products of reactions, they significantly improve productivity and reduce operational costs. Continuous research in this field aims to develop more efficient and environmentally friendly catalysts for future industrial needs.