Controllable disorder engineering in oxygen-incorporated MoS2 ultrathin nanosheets for efficient hydrogen evolution
Junfeng Xie1, Jiajia Zhang, Shuang Li
1Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China.
Journal of the American Chemical Society
|November 7, 2013
Summary
Researchers enhanced molybdenum disulfide (MoS2) catalysts for the hydrogen evolution reaction (HER) by engineering disorder and incorporating oxygen. This synergistic approach boosts catalytic activity and conductivity for efficient hydrogen production.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Molybdenum disulfide (MoS2) is a promising electrocatalyst for the hydrogen evolution reaction (HER).
- Enhancing HER activity requires engineering more active sites and improving conductivity.
- Synergistically modulating structure and electronics in MoS2 for HER remains a challenge.
Purpose of the Study:
- To achieve synergistic structural and electronic modulations in MoS2 catalysts.
- To enhance the electrocatalytic activity for hydrogen evolution.
- To develop a new pathway for improving catalyst performance.
Main Methods:
- Controllable disorder engineering of MoS2.
- Simultaneous oxygen incorporation into MoS2.
- Characterization of catalyst structure, electronic properties, and HER performance.
Main Results:
- Disordered MoS2 structures provide abundant unsaturated sulfur active sites.
- Oxygen incorporation regulates electronic structure and enhances conductivity.
- Optimized catalyst shows an onset overpotential of 120 mV, high current density, and excellent stability.
Conclusions:
- Synergistic structural and electronic modulations significantly enhance HER activity in MoS2.
- Controllable disorder and oxygen incorporation offer a viable strategy for catalyst design.
- This work presents a new pathway for developing advanced electrocatalysts.
