• 文献标题:   Probing the room-temperature oxidative desulfurization activity of three-dimensional alkaline graphene aerogel
  • 文献类型:   Article
  • 作  者:   PAN YK, CHEN MQ, HU MF, TIAN M, ZHANG YY, LONG DH
  • 作者关键词:   graphene aerogel, hydrogen sulfide, roomtemperature oxidation, superoxide radical, catalytic mechanism
  • 出版物名称:   APPLIED CATALYSIS BENVIRONMENTAL
  • ISSN:   0926-3373 EI 1873-3883
  • 通讯作者地址:   East China Univ Sci Technol
  • 被引频次:   9
  • DOI:   10.1016/j.apcatb.2019.118266
  • 出版年:   2020

▎ 摘  要

Room-temperature catalytic oxidation of H2S has emerged as an intriguing solution to the H2S elimination, but is currently challenged by desulfurizers' low capacity. Herein, three-dimensional alkaline graphene aerogels are prepared and demonstrated to be highly efficient catalysts for H2S oxidation, achieving 3.19 g/g of breakthrough capacity. Such high sulfur capacity is attributed to the interconnected graphene network consisting of graphene sheets, providing more product storehouse compared with traditional porous carbons. Further, a radical-induced reaction pathway of H2S oxidation is proposed that oxygen molecules could be activated to form superoxide radicals merely on graphene, which induces the dissociated HS - oxidation to sulfur. The characterization results also uncover that the formed sulfur goes through a process of nucleation and growth on graphene sheets. The current work could provide critical insights into the behavior of H2S oxidation and therefore offers a novel route of developing catalysts with large sulfur capacity at room temperature.