A Se-doped MoS2 nanosheet for improved hydrogen evolution reaction
Xianpei Ren1, Qiang Ma, Haibo Fan
1Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education, Institute for Advanced Energy Materials, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710119, China. szliu@dicp.ac.cn.
Selenium-doped Molybdenum disulfide (MoS2) demonstrates superior hydrogen evolution reaction (HER) activity due to more active sites and better conductivity. This doping strategy significantly enhances MoS2 catalyst performance.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Molybdenum disulfide (MoS2) is a promising material for the hydrogen evolution reaction (HER).
- Improving the catalytic activity and efficiency of MoS2 remains a key challenge in electrocatalysis.
Purpose of the Study:
- To investigate the effect of selenium (Se) doping on the HER activity of MoS2.
- To develop an effective strategy for enhancing the electrocatalytic performance of MoS2-based catalysts.
Main Methods:
- Synthesis of Se-doped MoS2.
- Electrochemical characterization of pristine and Se-doped MoS2 for HER.
Main Results:
- Se-doped MoS2 exhibited significantly enhanced catalytic activity compared to pristine MoS2.
- The doped catalyst showed a lower overpotential of -140 mV and a smaller Tafel slope of 55 mV dec(-1).
- Increased active sites and improved conductivity were observed in Se-doped MoS2.
Conclusions:
- Selenium doping is an effective strategy to boost the HER performance of MoS2.
- The enhanced activity is attributed to increased active sites and improved electrical conductivity.
- This work presents a promising approach for designing advanced MoS2-based electrocatalysts.
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