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Precious Metal Catalysts
As an excellent carrier material, activated carbon can effectively improve the dispersion and stability of precious metals. In noble metal catalytic reactions, noble metal particles tend to aggregate on the surface of activated carbon to form nanoscale particles. This highly dispersed structure is conducive to improving catalytic activity and selectivity. Compared with traditional precious metal supports, activated carbon has a higher specific surface area and better pore structure, which can provide more active sites and catalytic reaction channels, thereby improving catalytic efficiency.
In addition, activated carbon also has good adsorption properties, which can adsorb waste gas and harmful substances in catalytic reactions and reduce catalyst poisoning and deactivation. In some organic synthesis reactions, activated carbon can adsorb organic waste gases and impurities, improving reaction purity and yield. In some gas phase reactions, activated carbon can adsorb reactants and intermediates, reduce unnecessary side reactions, and improve the selectivity and yield of catalytic reactions.
In addition, activated carbon can also form a composite catalyst with precious metals to improve the performance of catalytic reactions through synergistic effects. The electrical and thermal conductivity of activated carbon can improve the electron transfer rate and heat transfer efficiency of precious metals and promote the catalytic reaction. At the same time, the surface functional groups of activated carbon can form chemical bonds with precious metals, enhance the binding force between precious metal particles and activated carbon carriers, and extend the service life of the catalyst.
In general, the role of activated carbon in precious metal catalysis is multifaceted. It can be used as an excellent carrier material to improve the dispersion and stability of precious metals, and as an adsorption material to reduce the interference of harmful substances on the catalyst. It can also form a composite catalyst with precious metals to improve the efficiency and selectivity of catalytic reactions.
