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Fuel v.212, 2018년, pp.395 - 404   SCI SCIE
본 등재정보는 저널의 등재정보를 참고하여 보여주는 베타서비스로 정확한 논문의 등재여부는 등재기관에 확인하시기 바랍니다.

Ag-loaded cerium-zirconium solid solution oxide nano-fibrous webs and their catalytic activity for soot and CO oxidation

Lee, Chanmin (Department of Chemical and Biomolecular Engineering, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea ) ; Jeon, Yukwon (Department of Chemical and Biomolecular Engineering, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea ) ; Kim, Taehyen (School of Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong ) ; Tou, Akihiro (Center of Advanced Instrumental Analysis, Kyushu University, 6-1, Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan ) ; Park, Joo-Il (Department of Chemical & Biological Engineering, Hanbat National University, 125 Dongseodae-ro, Yuseong-gu, Daejeon 305-719, Republic of Korea ) ; Einaga, Hisahiro (Department of Advanced Materials Science and Engineering, Faculty of Engineering Sciences, Kyushu University, 6-1, Kasuga-koen, Kasuga, Fukuoka, 816-8580, Japan ) ; Shul, Yong-Gun (Department of Chemical and Biomolecular Engineering, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Republic of Korea ) ;
  • 초록  

    Abstract The catalytic combustion of soot and CO is one of the key technologies required to meet rigorous emission standards. Recently, solid solution materials have been employed in heterogeneous catalysts because of their remarkable intrinsic activities and good stabilities. However, the low number of contact points between soot particles and the catalyst remains a challenge to enhancing catalytic performance. Thus, we herein report the preparation of Ce-ZrO 2 solid solution nano-fibrous web catalysts with a hierarchical structure using an electrospinning method, where Ag particles were loaded onto the surface of the Ce-ZrO 2 webs. X-ray diffraction, scanning transmission electron microscopy, and energy dispersive spectroscopic studies allowed us to investigate the morphological and crystal structures of the prepared Ce-ZrO 2 and Ag/Ce-ZrO 2 web catalysts. Moreover, the relationship between the Ce/Zr ratio and activated oxygen is discussed based on X-ray photoelectron spectroscopy results. Following the catalytic oxidation of soot and CO using our novel materials, we found that the Ce 0.67 Zr 0.33 O 2 web exhibited higher catalytic activities than the Ce 0.5 Zr 0.5 O 2 and Ce 0.33 Zr 0.67 O 2 webs, respectively. In addition, Ag/Ce 0.67 Zr 0.33 O 2 exhibited enhanced catalytic activity compared with the pristine Ce 0.67 Zr 0.33 O 2 for the oxidation of both soot (e.g., 500°C vs. 544°C at 50% conversion) and CO (e.g., 282°C vs. 408°C at 50% conversion). It therefore appeared that our proposed Ce-ZrO 2 solid solution nano-fibrous web catalysts bearing Ag particles exhibited superior redox properties and enhanced surface areas, and as such, are promising candidates for use in the oxidation of both soot and CO. Highlights Ce-ZrO 2 solid-solution oxide fibrous webs were synthesized by electrospinning. Ag particles were deposited to improve catalytic activity. Ag/Ce 0.67 Zr 0.33 O 2 exhibited superior catalytic activity to other sample. Redox property of Ag and enhanced surface areas improved the catalytic oxidation. Graphical abstract [DISPLAY OMISSION]


  • 주제어

    Zr-Ce .   Fibrous catalyst .   Electrospinning .   Soot oxidation .   CO oxidation.  

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