How Do Platinum Alloys Improve Catalytic Performance?
Platinum alloys improve catalytic performance in several ways:
1. Enhanced Activity: Alloying elements can modify the electronic structure of platinum, leading to improved catalytic activity. For instance, platinum-ruthenium alloys exhibit superior performance in methanol oxidation compared to pure platinum. 2. Increased Stability: Platinum alloys are more resistant to sintering and poisoning, which prolongs their lifespan. Alloying with elements like rhodium and iridium can enhance the thermal stability of the catalyst. 3. Cost Reduction: By using less platinum and incorporating other, less expensive metals, the overall cost of the catalyst can be reduced without compromising its performance.
