{"title":"A general strategy for even growth of ultrasmall MoS2 nanosheets on carbon supports to boost hydrogen evolution activity","authors":"Shuhuan Han, Zhengxuan Shao, Xiuhui Li, Jiwen Fu, Xiaofei Zeng","doi":"10.1002/aic.18514","DOIUrl":null,"url":null,"abstract":"<p>MoS<sub>2</sub> has been considered as a potential replacement for Pt-based catalysts in hydrogen evolution reaction. But the lack of sufficient active sites limits the intrinsic activity of MoS<sub>2</sub>-based catalysts. Here, we propose a general strategy to synthesize ultra-small MoS<sub>2</sub> nanosheets grown evenly on carbon substrates to maximize the active sites by exposing more edge positions and inducing MoS<sub>2</sub> phase transition. It is found that Ru can assist MoS<sub>2</sub> to grow vertically and uniformly on the surface of carbon substrates by <i>in situ</i> derivatization to improve the catalytic activity effectively. MoS<sub>2</sub> nanosheets on the substrates are much smaller and denser than those prepared without Ru or with other metal elements. Electrocatalysis results revealed that the number of active sites and conductivity of the optimized Ru-MoS<sub>2</sub>@CSs increase obviously, and the overpotential at 10 mA cm<sup>−2</sup> is much lower than that of MoS<sub>2</sub>@CSs and metal (Co, Ni)-MoS<sub>2</sub>@CSs, respectively, at 1.0 M KOH.</p>","PeriodicalId":120,"journal":{"name":"AIChE Journal","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"AIChE Journal","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/aic.18514","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
MoS2 has been considered as a potential replacement for Pt-based catalysts in hydrogen evolution reaction. But the lack of sufficient active sites limits the intrinsic activity of MoS2-based catalysts. Here, we propose a general strategy to synthesize ultra-small MoS2 nanosheets grown evenly on carbon substrates to maximize the active sites by exposing more edge positions and inducing MoS2 phase transition. It is found that Ru can assist MoS2 to grow vertically and uniformly on the surface of carbon substrates by in situ derivatization to improve the catalytic activity effectively. MoS2 nanosheets on the substrates are much smaller and denser than those prepared without Ru or with other metal elements. Electrocatalysis results revealed that the number of active sites and conductivity of the optimized Ru-MoS2@CSs increase obviously, and the overpotential at 10 mA cm−2 is much lower than that of MoS2@CSs and metal (Co, Ni)-MoS2@CSs, respectively, at 1.0 M KOH.
期刊介绍:
The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering.
The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field.
Articles are categorized according to the following topical areas:
Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food
Inorganic Materials: Synthesis and Processing
Particle Technology and Fluidization
Process Systems Engineering
Reaction Engineering, Kinetics and Catalysis
Separations: Materials, Devices and Processes
Soft Materials: Synthesis, Processing and Products
Thermodynamics and Molecular-Scale Phenomena
Transport Phenomena and Fluid Mechanics.