In the field of modern industrial catalysts, activated carbon plays a crucial role as an excellent carrier for precious metals. By loading precious metals onto activated carbon, the dispersion and catalytic activity of precious metals are improved, leading to a wide range of applications in many fields such as chemical, petrochemical and environmental protection.
Advantages of activated carbon as a carrier
Activated carbon is a porous material composed of carbon, which has the following advantages, making it an ideal carrier for precious metals:
1. High specific surface area: The high specific surface area of activated carbon (typically up to 500 to 1500 m²/g) provides abundant surface sites for the loading of precious metals and ensures that the precious metals are present in a highly dispersed form, thus improving their catalytic efficiency.
2. Adjustable pore structure: The pore size distribution of activated carbon can be adjusted by controlling the production process to suit the molecular size of different reactants and the field of reaction mechanisms.
3. Chemical stability: The chemical inertness of activated carbon allows it to remain stable in acids, bases and most organic solvents, which is particularly important for carrying reactive chemicals.
4. Surface modifiable: The presence of functional groups on the surface of activated carbon (e.g., hydroxyl, carboxyl, etc.) provides additional chemical bonding for stable loading of precious metals.
The affinity and loading capacity of activated carbon can be further improved by surface modification.