Teaching of Extended Catalyst Course Based on Scale Perspective
SUN Lei1,2*, ZHENG Chang-Long2
1.High School Attached To Northeast University, Changchun 130021,China;
2.Institute of Chemical Education, Northeast University, Changchun 130024,China
Abstract In this paper, the experimental process of hydrogen peroxide decomposition catalyzed by Fe3+ was explored. It was proved that the chemical properties of some homogeneous catalysts changed after they participated in the reaction. It helped students to understand the concept of catalyst thoroughly and comprehensively. Then, the comparison and summary of homogeneous catalysts and heterogeneous catalysts were made, especially the influence of scale on the activity of catalysts. In this paper, a new type of heterogeneous catalyst magnetic Fe3O4 nanoparticles was designed and prepared from a scale-based perspective, and its catalytic decomposition process of hydrogen peroxide was investigated experimentally. It was compared with the catalytic process of Fe3+. The scale-based approach was taken as the starting point for thinking about the problem. It guided students to understand the design idea of the frontier of scientific research (monoatomic catalyst) and constructed students’ understanding. The concept of material scale promoted students to further understand the nature of science and subject value, and cultivates students’ innovative consciousness.
SUN Lei, ZHENG Chang-Long. Teaching of Extended Catalyst Course Based on Scale Perspective[J]. Chinese Journal of Chemical Education, 2020, 41(5): 17-25.
