文献类型：期刊文献

英文题名：Probing the room-temperature oxidative desulfurization activity of three-dimensional alkaline graphene aerogel

作者：Pan, Yankai[1];Chen, Mingqi[1];Hu, Mengfei[1];Tian, Meng[1];Zhang, Yayun[1];Long, Donghui[1,2]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：262

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20194207543214);WOS:【SCI-EXPANDED(收录号:WOS:000501613700006)】；

基金：This work was financially supported by National Natural Science Foundation of China (no. 21576090 and no. 21878091), and Fundamental Research Funds for the Central Universities (222201718002).

语种：英文

外文关键词：Graphene aerogel; Hydrogen sulfide; Room-temperature oxidation; Superoxide radical; Catalytic mechanism

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.