Abstract The catalyst has the characteristics of reducing the activation energy of the reaction and accelerating the reaction rate. Catalysis chemistry is an important branch in the field of physical chemistry. Catalysis action principles are the basis of catalysis chemistry knowledge.The L-cysteine oxidation reaction experiment under the catalysis of KI was designed for students’ understanding concretely the principles. The effect of the catalyst was verified by the two variables of temperature and catalyst; the intermediate species was detected with a chameleon reaction, understanding how catalyst alter reaction pathways; it was validated that the catalyst do not alter the thermodynamics properties of equilibrium constant and Gibbs free energy of the reactionby means of the primary battery electromotive force (EMF) measurement. Through this experiment, the principle of catalyst action is demonstrated vividly. The knowledge of kinetics, catalytic chemistry, and electrochemistry will be integrated to consolidate students’ theoretical knowledge and exercise using their knowledge ability in the experiment. The measurement device of electromotive force for a non-metal redox reaction battery was designed, which stimulated the students’ innovation ability.
REN Cheng-Jun, ZHANG Cheng, YAN Shuang-Hao, ZHAO Ming, LI Shan-Shan, WANG Jian-Li, YOU Jin-Song. Deign of Catalyst Action Principles Experiment: Oxidation Reaction of L-Cysteine Catalyzed by KI[J]. Chinese Journal of Chemical Education, 2024, 45(8): 36-42.
