期刊
ACS NANO
卷 4, 期 8, 页码 4677-4682出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn1011013
关键词
molybdenum disulfide (MoS2); hydrodesulfurization (HDS); scanning tunneling microscopy (STM); catalysis; nanocluster; size-dependent properties
类别
资金
- Lundbeck Foundation
- Carlsberg Foundation
- Villum Kahn Rasmussen Foundation
- Danish Strategic Research Council [2106-06-0016]
- European Research Council (ERC) [4239834, 227430]
- European Research Council (ERC) [227430] Funding Source: European Research Council (ERC)
In hydrodesulfurization (HDS) of fossil fuels, the sulfur levels are reduced by sulfur extraction from hydrocarbons through a series of catalyzed reaction steps on low-coordinated sites on molybdenum disulfide (MoS2) nanoclusters. By means of scanning tunneling microscopy (STM), we show that the adsorption properties of MoS2 nanoclusters toward the HDS refractory dibenzothiophene (DBT) vary dramatically with small changes in the cluster size. STM images reveal that MoS2 nanoclusters with a size above a threshold value of 1.5 nm react with hydrogen to form so-called sulfur vacancies predominately located at edge sites, but these edge vacancies are not capable of binding DBT directly. In contrast, MoS2 nanoclusters below the threshold perform remarkably better. Here, sulfur vacancies form predominantly at the corner sites, and these vacancies show a high affinity for DBT. The results thus indicate that very small MoS2 nanoclusters may have unique catalytic properties for the production of clean fuels.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据