Pd Precious Metal Catalyst

A precious metal catalyst uses a precious metal coating of platinum, palladium, and rhodium on a ceramic honeycomb to chemically convert harmful exhaust gases into less harmful substances,the high surface area of the honeycomb structure allows the precious metals to efficiently catalyze reactions like transforming carbon monoxide into carbon dioxide and hydrocarbons into water and carbon dioxide. The specific combination and amount of precious metals vary based on the vehicle and its emission standards, and their value makes them a target for theft and recycling.

• Precious Metal Catalyst Catalytic action: Precious metals like platinum and palladium act as catalysts, initiating and accelerating chemical reactions without being consumed.
• Precious Metal Catalyst Reaction process: When exhaust gases pass over the coated honeycomb structure, the catalysts trigger reactions. For example, carbon monoxide is oxidized to carbon dioxide (CO2),and hydrocarbons(CxH2x+2)are oxidized to carbon dioxide (CO2)and water(H2O).
• Precious Metal Catalyst Structure: The metals are coated onto a ceramic or metal monolith with a honeycomb-like structure, which provides a massive surface area for the reactions to occur efficiently.
• Precious Metal Catalyst Operating temperature: The reactions require the converter to reach a high operating temperature, around 300∘

• Platinum (Pt): Used as a catalyst to accelerate chemical reactions.
• Palladium (Pd): Works with platinum to help convert harmful gases into less harmful ones.
• Rhodium (Rh): Primarily used to reduce nitrogen oxides (NOx) into nitrogen gas (N2) and oxygen(O2) in a three-way catalytic converter.

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