Atomic-layered Pt clusters on S-vacancy rich MoS2- with high electrocatalytic hydrogen evolution
Feng Shi1, Wenzhuo Wu1, Jiafu Chen2
1College of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052, P. R. China. chenjf@zzu.edu.cn qunxu@zzu.edu.cn and Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450052, P. R. China.
Chemical Communications (Cambridge, England)
|June 24, 2021
Summary
We developed a highly active platinum cluster catalyst on sulfur-vacancy-rich molybdenum disulfide (MoS2-x) for efficient hydrogen evolution. This novel catalyst demonstrates superior performance and durability for water splitting applications.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Maximizing atomic utilization efficiency of platinum group metals is crucial for hydrogen evolution reactions (HER) in water splitting.
- Developing advanced catalyst supports is key to enhancing the performance of precious metal catalysts.
Purpose of the Study:
- To develop a novel catalyst with highly exposed platinum (Pt) clusters on a sulfur-vacancy rich molybdenum disulfide (MoS2-x) support.
- To evaluate the electrochemical hydrogen evolution reaction (HER) performance and durability of the developed Pt/Sv-MoS2-x catalyst.
Main Methods:
- Synthesis of sulfur-vacancy rich MoS2-x support.
- Impregnation of platinum clusters onto the MoS2-x support to create Pt/Sv-MoS2-x.
- Electrochemical characterization of HER performance, including overpotential and Tafel slope measurements.
Main Results:
- Pt/Sv-MoS2-x exhibited outstanding HER performance with a low overpotential of 26.6 mV at 10 mA cm⁻² and a Tafel slope of 34.8 mV dec⁻¹.
- The catalyst demonstrated good durability.
- The mass activity of Pt in Pt/Sv-MoS2-x was an order of magnitude higher than commercial Pt/C at 0.08 V overpotential.
Conclusions:
- The synergistic interaction between platinum and the sulfur-vacancy rich MoS2-x support significantly accelerates HER kinetics.
- Pt/Sv-MoS2-x represents a highly efficient and promising electrocatalyst for hydrogen evolution in water splitting.
More Related Videos
Related Concept Videos
02:42Valence Bond Theory
9.9K
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
9.9K
02:47Voltaic/Galvanic Cells
59.9K
Spontaneous Chemical Reactions
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
Spontaneous redox reactions occur abundantly in nature. The chemical reaction occurring in a disposable AA battery powering our remote controls is one such example of a spontaneous redox reaction. Another example is the immersion of coiled copper wire into an aqueous silver nitrate solution. The reaction shows a gradual, visually impressive color change from colorless to bright blue and the formation of a grey precipitate on the copper wire. In this experiment,...
59.9K