http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Yang, Seung Jae,Im, Ji Hyuk,Nishihara, Hirotomo,Jung, Haesol,Lee, Kunsil,Kyotani, Takashi,Park, Chong Rae American Chemical Society 2012 JOURNAL OF PHYSICAL CHEMISTRY C - Vol.116 No.19
<P>The hydrogen adsorption isotherms of six metal–organic frameworks (MOFs) and three microporous carbons, measured at 77 K (up to 1 bar) and 298 K (up to 100 bar), have been systematically examined for correlations with their pore characteristics. From the obtained correlations, H<SUB>2</SUB> adsorption was found to occur preferentially in ultrafine pores at both 77 K (≤1 bar) and 298 K (100 bar), irrespective of the adsorbent. This represents the first experimental evidence that ultrafine pores in MOFs improve the efficiency of H<SUB>2</SUB> adsorption at 298 K and at high pressures, indicating that that the low H<SUB>2</SUB> storage capacities of reported ultrahigh microporous MOFs at 298 K result from the prominence of micropores with diameters 1–2 nm, which are inadequate at 298 K and high pressures. Furthermore, these correlations suggest strong links between the H<SUB>2</SUB> storage capacities at 77 and 298 K, which offer an easy method for predicting H<SUB>2</SUB> adsorption capacities under unapproachable conditions. This study provides guidance in the development of new MOFs or other adsorbents with an optimized H<SUB>2</SUB> storage capacity at near-ambient temperatures and a swift screening method of newly synthesized porous adsorbents.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpccck/2012/jpccck.2012.116.issue-19/jp302304w/production/images/medium/jp-2012-02304w_0002.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp302304w'>ACS Electronic Supporting Info</A></P>