文献类型：期刊文献

英文题名：Anti-corrosion MgO nanoparticle-equipped graphene oxide nanosheet for efficient room-temperature H2S removal

作者：Xu, Hai[1];Pan, Yankai[1];Hu, Feng[1];Niu, Bo[1];Zhang, Yayun[1,2];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：2022

卷号：10

期号：35

起止页码：18308

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20223612695445);WOS:【SCI-EXPANDED(收录号:WOS:000844264000001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (No. 22008073, No. 21878091, No. 22078100, and No. 52102098), Shanghai Sailing Program (No. 20YF1410600), Fundamental Research Funds for the Central Universities (222201718002), and the Shanghai Talent Development Fund (2021026).

语种：英文

外文关键词：Catalysis - Catalyst activity - Corrosion resistance - Density functional theory - Energy gap - Graphene - Magnesia - Metal nanoparticles - Metals - Porous materials - Room temperature

摘要：Metal oxides are promising materials for catalytic oxidation of H2S at room temperature, but their deficiencies are a low catalytic performance and tendency to corrode in acid reaction surroundings. Herein, we report a facile strategy to prepare a series of ultrafine metal oxide nanoparticles loaded on reduced graphene oxide (rGO) for efficient H2S catalytic oxidation at room temperature. The hyper-dispersed nanoparticles prevent the stacking of rGO and maintain its two-dimensional sheet structure, thus breaking through the limits of traditional porous carbons with easy blockage of nanopores and low porosity, and thereby offering large sulfur storage depot. Additionally, higher density of alkaline sites is provided for catalytic reaction that synergistically enhances the desulfurization performance. Density functional theory calculation was employed for interpreting the involved mechanism, and we found that the MgO crystal, with a larger band gap and poorer degree of its bands mixing with H2S orbitals, possesses lower reactivity towards H2S, which corresponds to strong corrosion resistance. Hence, the MgO/rGO composite exhibits excellent catalytic activity with a breakthrough capacity of 3110 mg g(-1), which is higher than that of its counterparts. The current work contributes new insights into the synergistic catalytic oxidation mechanism of H2S by metal oxides and carbon-based composites, and provides a theoretical basis for the design and development of efficient room-temperature desulfurizers.