Increasing the temperature from 30°C to 90°C consistently enhanced the reaction rate for all catalysts. This aligns with the Arrhenius equation, which predicts that higher temperatures increase molecular activity, leading to more frequent and energetic collisions that overcome activation energy barriers. The most substantial increase in oxygen production was observed between 60°C and 90°C for all catalysts, particularly MnO2, which supports the hypothesis that higher temperatures accelerate the decomposition reaction.