影响过氧化氢催化分解速率的因素

Research into Influential Factors of Catalytic Decomposition Rate of Hydrogen Peroxide

在不同的pH值和不同的温度下,用碘化钾作催化剂,对过氧化氢分解速率进行实验测定,结果发现:碘化钾含量越高,反应的速率常数越大,且随着温度的升高,在相同催化剂浓度下,速率常数呈指数增大;速率常数在pH值为7时为最大;改变反应体系的温度对催化分解的影响远大于改变反应体系的酸度与改变KI浓度所产生的影响.

H2O2 decomposition rate is researched with KI as catalyst, different pH and temperature. The results shows： temperature has more effect on decomposition rate than pH value and KI content. The reaction rate constant increases very quickly with the increase of KI content, and increasing trend index is shown with the increase of temperature and the same catalyst content. It is the largest in the neutral with different pH value.