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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Anisotropic Proton Conduction in a Channel-Type Metal-Organic Framework MOF-74

2018년 2월 12일 22시 55분 16초
INOR.P-196 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
Dahae Song, Nak Cheon Jeong*
Department of Emerging Materials Science, Daegu Gyeongbuk Institute of Science & Technology, Korea
Often characterized by large internal surface areas and extended nanoporosity, MOFs have received attentions as potential candidates for applications in chemical separations, gas storage, chemical sensing, and ion exchanges. Recently, proton conductivities of MOFs have also received substantial attention due partly to academic curiosity about the correlation between the mobility of protons and the porosity of MOF and partly to the potentials in industrial applications for fuel cells and batteries. The demonstration of proton conductivity has been confined only to several MOFs, which possess (i) abundant proton sources in either pore or framework, (ii) large pores that contains sufficient proton-transporting medium, and most importantly (iii) high chemical stability against water and acid. However, these limitations also limit the studies for proton conductivity. For examples, anisotropy in proton conduction which correlates with the pore structure of MOFs has been rarely studied. That is due to lack of a technique to synthesize large crystals of MOFs that should be connected to electrodes prior to the study. In this poster, we will present the high anisotropy in proton conductivity of robust Co-MOF-74 which contains 1-dimensional channels along c-axis. More precisely, while the MOF-74 engenders low proton conductivity with the value of 10-6 S cm-1 when the electrodes are connected perpendicular to the c-axis, it engenders approximately three-order higher conductivity with the value of 10-3 S cm-1 when the electrodes are connected parallel to the c-axis. Further, we demonstrate that this proton conductivity can be substantially enhanced when inorganic acid or base is introduced into the MOF crystals.