하이드로퀴논과 플러렌 합성물의 분광학적 분석과 수소저장특성 연구

Abstract

Organic clathrates are crystalline inclusion compounds formed with host organic molecules and low molecular-weight guests. It has been reported that organic clathrates are more stable than clathrate hydrates over a wide range of temperature and pressure conditions. In this work, we synthesized the fullerene (C60)-loaded hydroquinone (HQ) mixture clathrate consisting of a large molecular guest C60 per three host HQ molecules, that is, (HQ)3C60. Powder X-ray diffraction was used to identify the crystal structure of (HQ)3C60. We found that the (HQ)3C60 compound shows unusual high selectivity for CO2 over H2 and CH4 in our system. Whereas, The hydrogen storage capacity of (HQ)3C60 was found to be 2.8 wt% at 77 K and 8 MPa, indicating that the hydrogen molecules can occupy the interstitial spaces between the host HQ and the guest C60. The proposed organic clathrate for hydrogen storage holds great potential for future materials.