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Recently, the research team of Professor Liu Yongning of the School of Materials Science and Engineering of Xi'an Jiaotong University, in collaboration with Professor Zhu Haiyan of Northwest University and Associate Professor Wu Gang of the State University of New York at Buffalo, proposed a catalyst preparation strategy based on porous nitrogen-containing carbon balls. After optimization of loading, the catalyst showed ultra-high catalytic activity and stability under alkaline conditions. Related research has been published in "American Chemical Society-Catalysis".
Direct methanol fuel cells are environmentally friendly, fuel is readily available, and are easy to carry, so they have huge market prospects. However, the methanol oxidation reaction kinetics of the direct methanol fuel cell anode is slow, and precious metal catalysts are easily poisoned by intermediate products during the alcohol oxidation process, resulting in a decline in catalytic activity.
The researchers proposed a catalyst preparation strategy that uses porous nitrogen-containing carbon spheres as a carrier and CeO2 nanodots as loading anchors to achieve high dispersion loading of nano-scale active sites. The results show that the rich pore structure of porous nitrogen-containing carbon spheres greatly enhances the degree of dispersion of Pd and CeO2, significantly refines the Pd particle size, effectively increases the electrochemically active area of ​​the catalyst, and further enhances the activity and activity of the catalyst. stability. The catalyst also exhibits excellent performance in a direct methanol fuel cell with a fiber membrane structure. (Reporter Zhang Xingyong)
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