MnO2, as hypothesized, was the most effective catalyst at all tested temperatures. This is attributed to its strong catalytic properties, which significantly lower the activation energy for the decomposition of hydrogen peroxide. PbO2, while effective, did not match the catalytic efficiency of MnO2 but outperformed Fe2O3. Fe2O3 was the least effective, possibly due to its lower surface area or intrinsic catalytic properties, which do not lower the activation energy as effectively as the other catalysts.