제올라이트-탄소 복합체의 전기화학적 촉매 반응 연구 = A study on the electrochemical catalytic reaction of zeolite-carbon composite

다국어 초록 (Multilingual Abstract)

Zeolites, as acid catalysts in heterogeneous catalytic reactions, have been extensively studied regarding the function of their acid sites. However, their application in electrocatalytic reaction has been limited due to their poor electrical conductivity. To address this issue, we introduced a highly conductive sp2-carbon framework within the zeolite pores to enhance the electrical conductivity. The carbon with acid sites exhibited high specific surface area and pore volume. Notably, it demonstrated an abundance of acid sites, including Brønsted acid sites derived from the zeolite.
Platinum was selected as the catalyst for the electrochemical upcycling of glycerol and was subsequently supported on this microporous carbon with acid sites. After Pt loading, the structure of aluminosilicate remained stable, and the acid sites were preserved. Transmission electron microscopy analysis confirmed that the Pt nanoparticles were highly dispersed on the carbon support. Furthermore, energy-dispersive X-ray spectroscopy mapping confirmed the overlapping of Pt and Al sites. X-ray absorption spectroscopy confirmed the formation of Pt-Al bonds, and the Pt exhibited a more metallic state.
The electrochemical glycerol oxidation reaction was performed in a neutral electrolyte to investigate the effect of the acid sites. The Pt with acid sites showed high catalytic activity, resulting in significantly high glycerol conversion and product yield. Furthermore, the turnover frequency (TOF) and reaction rate were 30-fold and 17-fold higher, respectively, compared to the acid site free PtYTC. The synergy between Pt sites and acid sites on the highly conductive carbon resulted in superior catalytic activity for the glycerol oxidation reaction.

목차 (Table of Contents)

• 1. 서론 1
• 2. 실험부문 10
• 3. 결과 및 토의 15
• 4. 결론 38
• 5. 참고 문헌 41