Which outcome affects reaction rate when a catalyst's surface area reduces due to sintering at high temperature?

💡 Explanation

When a catalyst sinters, surface area is reduced, decreasing active site availability because smaller catalyst particles fuse together, reducing the catalyst's effective surface area for reactant adsorption. Therefore, reaction rate decreases due to less active sites, rather than increased activation energy, reverse equilibrium or high diffusion rate which are independent of surface area properties.

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