Enhancing Catalytic Activity of MoS2 Basal Plane S-Vacancy by Co Cluster Addition
Journal Article
·
· ACS Energy Letters
- Stanford Univ., CA (United States)
- Stanford Univ., CA (United States). SUNCAT Center for Interface Science and Catalysis
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Sungkyunkwan Univ., Suwon (South Korea)
- Hewlett-Packard Labs., Palo Alto, CA (United States)
The basal plane of molybdenum disulfide (MoS2) was recently activated for hydrogen evolution reaction (HER) by creating sulfur (S) vacancies (MoS2-x). However, the HER activity of those S-vacancies depends on the concentration of S-vacancies, imposing a dilemma for either improving activity per site or increasing overall active site density. In this work, we use density functional theory (DFT) calculations and experiments to show that the HER activities of MoS2-x are greatly enhanced by adding cobalt (Co) clusters on the basal plane. Furthermore, our DFT results show that the highest HER activity is achieved when the Co clusters are anchored on the S-vacancies with the interface of Co-Mo as the preferred active site. Our experiments confirm that the addition of Co enhances the activity per unit active site and increases the electrochemical active surface area. These results demonstrate the basal plane activity of MoS2-x can be enhanced by decorating S-vacancies with transition-metal clusters.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231
- OSTI ID:
- 1656475
- Journal Information:
- ACS Energy Letters, Journal Name: ACS Energy Letters Journal Issue: 11 Vol. 3; ISSN 2380-8195
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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