[JACS] 我室詹东平教授发表论文:Electrochemical Storage of Atomic Hydrogen on Single Layer Graphene

发布日期:2021年11月05日   浏览次数:

我室詹东平教授在 JACS 上发表论文:Electrochemical Storage of Atomic Hydrogen on Single Layer Graphene

摘要:If hydrogen can be stored and carried safely at a high density, hydrogen-fuel cells offer effective solutions for vehicles. The stable chemisorption of atomic hydrogen on single layer graphene (SLG) seems a perfect solution in this regard, with a theoretical maximum storage capacity of 7.7 wt %. However, generating hydrogenated graphene from H2 requires extreme temperatures and pressures. Alternatively, hydrogen adatoms can easily be produced under mild conditions by the electroreduction of protons in solid/liquid systems. Graphene is electrochemically inert for this reaction, but H-chemisorption on SLG can be carried out under mild conditions via a novel Pt-electrocatalyzed “spillover-surface diffusion-chemisorption” mechanism, as we demonstrate using dynamic electrochemistry and isotopic Raman spectroscopy. The apparent surface diffusion coefficient (∼10–5 cm2 s–1), capacity (∼6.6 wt %, ∼85.7% surface coverage), and stability of hydrogen adatoms on SLG at room temperature and atmospheric pressure are significant, and they are perfectly suited for applications involving stored hydrogen atoms on graphene.

文章链接:https://pubs.acs.org/doi/10.1021/jacs.1c05253