文献类型：期刊文献

英文题名：Two-dimensional CaO/carbon heterostructures with unprecedented catalytic performance in room-temperature H2S oxidization

作者：Pan, Yankai[1];Chen, Mingqi[1];Su, Zhe[1];Wu, Kede[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：2021

卷号：280

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

收录：;EI(收录号：20203409092859);WOS:【SCI-EXPANDED(收录号:WOS:000572390300001)】；

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：CaO/carbon heterostructure; Carbon nanosheet; One-step method; Hydrogen sulfide; Catalytic oxidation

摘要：Two-dimensional (2D) carbon-based materials are attracting increasing interest as promising desulfurizers for tackling H2S emission issues at room temperature. Herein, the 2D CaO/carbon heterostructures are synthesized by a one-step method for H2S catalytic oxidation. Results indicate that the catalysts exhibit robust catalytic H2S performance with significant promotions for the generation of active oxygen species and the dissociation of H2S. Moreover, the roomy and open space created by 2D nanosheet structure could offer more exposed active sites for desulfurization reaction and larger storehouse for sulfur products compared with porous carbons. Consequently, the breakthrough sulfur capacity of the 2D CaO/carbon heterostructures achieves an unprecedented value of 9.10 g/g. Furthermore, a possible mechanism of H2S catalytic oxidation on the catalysts is proposed based on the experimental and characteristic results. This work could shed lights on the facile fabrication of high-capacity catalysts for H2S oxidation and the desulfurization behavior of the 2D carbon-based materials.