[17p-B309-1~19] 17.2 Graphene

[17p-B309-15] 【Highlighted Presentation】Hydrogen Isotope Gas Separation by Quantum Tunneling Effect of Graphene

〇Satoshi Yasuda¹, Hisayoshi Matsushima², Masahiro Yano¹, Tomo-o Terasawa¹, Hidehito Asaoka¹, Jessiel Gueriba³, Wilson Dino³, Katsuyuki Fukutani^1,4 (1.JAEA, 2.Hokkaido Univ., 3.Osaka Univ., 4.Univ. of Tokyo)

Keywords:graphene, isotope effect, Tunnel effect

In this study, hydrogen isotope separation ability of graphene was investigated by using electrochemical and theoretical approaches. We found that graphene exhibits high separation ability (H/D) and its bias dependence, and theoretical analysis showed that bias dependence of H/D results from a transition from the quantum tunneling regime to the classical over barrier regime for hydrogen isotopes transfer through the graphene. The findings will help us understand the origin of the isotope separation ability of graphene discussed so far and contribute to developing an economical hydrogen isotope enrichment system using two-dimensional materials.