Probingthe room-temperature oxidative desulfurization activity of three-dimensionalalkaline graphene aerogel
YankaiPan, Mingqi Chen, Mengfei Hu, Meng Tian, Yayun Zhang*, Donghui Long*
Applied Catalysis B: Environmental, 2020, 262, 118266.
文章链接：https://www.sciencedirect.com/science/article/pii/S0926337319310124?via%3Dihub
Room-temperaturecatalytic oxidation of H2S has emerged as an intriguing solution tothe H2S elimination, but is currently challenged by desulfurizers’low capacity. Herein, three-dimensional alkaline graphene aerogels are preparedand demonstrated to be highly efficient catalysts for H2S oxidation,achieving 3.19 g/g of breakthrough capacity. Such high sulfur capacity isattributed to the interconnected graphene network consisting of graphenesheets, providing more product storehouse compared with traditional porouscarbons. Further, a radical-induced reaction pathway of H2Soxidation is proposed that oxygen molecules could be activated to formsuperoxide radicals merely on graphene, which induces the dissociated HS−oxidation to sulfur. The characterization results also uncover that the formedsulfur goes through a process of nucleation and growth on graphene sheets. Thecurrent work could provide critical insights into the behavior of H2Soxidation and therefore offers a novel route of developing catalysts with largesulfur capacity at room temperature.
