关键词: 生物乙醇, 乙醛, 气相氧化, MnO₂催化剂, 构-效关系

Abstract: This comprehensive chemical experiment focuses on the preparation, characterization, and catalytic performance testing of nano-sized MnO₂ with four different crystal phases for the selective oxidation of bioethanol in the gas phase. The experiment covers the synthesis of inorganic nano-catalytic materials, catalyst structure and morphology characterization, catalytic performance evaluation, and kinetics analysis, adopting research-based teaching methods. The experiment not only cultivates students’ analytical and problem-solving skills but also fosters innovative thinking and research interest, inspiring students to contribute to the national “Double Carbon” goals and enhancing environmental awareness.

Key words: Bioethanol, Acetaldehyde, Gas-phase oxidation, MnO₂ catalyst, Structure-performance relationships