双金属ZIFs的制备及氧还原催化反应实验设计

Experimental design based on bimetalic ZIFs synthesisand electrocatalysis for oxygen reduction reaction

采用静置等方法,通过改变反应物配比和溶剂合成得到不同结构的Co-Zn双金属ZIFs材料。将碳化样品用于催化燃料电池的阴极氧化还原反应,通过分析测试结果发现制备的双金属ZIF-L与双金属ZIF-8催化性能(半波电位分别为0.83 V和0.82 V)均接近市面上催化性能较好但昂贵的Pt/C催化剂,有较好的应用前景。通过以上科研转化型综合化学实验能够将配位化学与电催化方面的知识较好地融合在一起,可以让学生了解仪器表征的原理和操作方法,有利于培养学生的实验技能和锻炼学生运用前沿科学知识解决问题,可以作为化学工程相关专业综合性实验项目。

Co-Zn bimetallic ZIFs with different structures are prepared though adjusting reactant and solvent with nature precipitation method.When carbonized sample was utilized as electrocatalyst for oxygen reduction reaction(ORR),bimetallic ZIF-L(half-wave potential,0.83V)and ZIF-8(half-wave potential,0.82V)show higher catalytic performance than the commercial Pt/C catalyst.The scientific experiment can combine the knowledge of coordination chemistry and electrocatalysis and help the students to acquire the principle of instrument and operation,which is beneficial to the experimental technique and problem-solving ability of students and can be applied as a comprehensive experimental projection in chemical engineering related majors.