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Enhanced H2 Storage Capacity by Palladium Nanoparticles Fabricated in a Metal-Organic Framework

등록일
2008년 2월 14일 10시 29분 43초
접수번호
1256
발표코드
28P163포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅳ>
발표형식
포스터
발표분야
무기화학
저자 및
공동저자
천영은, 백명현
서울대학교 화학부,
Palladium nanoparticles (PdNPs, size 3.0±0.4 nm; 3.0 wt% Pd) were fabricated in the MOF [Zn(NTB)2(EtOH)2]n·4nEtOH (1) by immersion of 1 in the MeCN solution of Pd(NO3)2·2H2O. The PdNPs were formed by the redox reaction between Pd(II) ions and arylamine group of NTB3- incorporated in 1, as evidenced by FE-TEM, EDS, and XPS. The H2 adsorption capacity depends on the amount of palladium nanoparticles loaded in the MOF. In particular, PdNPs(3.0 wt%)@1' enhances H2 adsorption capacity to 1.48 wt% at 77 K and 1 atm, compared to 1.03 wt% in 1', although CO2 sorption indicates that surface area is decreased to 43% of that of 1'. Considering the decreased surface area and the increased weight of sample caused by the loaded PdNPs as well as NO3- inclusions in the resulting framework, the effective enhancement of hydrogen adsorption in 1' by PdNPs is ca. 370%. The isosteric heat of the enhanced H2 adsorption suggests that PdNPs is spillover effect that dissociates the H2 molecules.

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