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Reduction of Alkenes: Asymmetric Catalytic Hydrogenation

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Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...

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Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
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Roadmap and Direction toward High-Performance MoS₂ Hydrogen Evolution Catalysts.

¹Department of Energy and Resources Engineering, College of Engineering, Peking University, Beijing, 100871 P. R. China.

|July 12, 2021

Summary

Molybdenum disulfide (MoS₂) shows potential for platinum-like hydrogen evolution reaction (HER) performance. Strategies like phase engineering and defect control enhance MoS₂ catalysts for efficient HER catalysis.

Keywords:

2D catalyst HER MoS2 Pt-like activity characterization electrocatalysis mechanism structure

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Area of Science:

Materials Science
Electrochemistry
Catalysis

Background:

Molybdenum disulfide (MoS₂) exhibits intrinsic potential for platinum-like hydrogen evolution reaction (HER) performance.
Pristine MoS₂ shows limited HER activity due to insufficient catalytic sites and poor conductivity.

Purpose of the Study:

To review and analyze strategies for fabricating superior MoS₂-based HER electrocatalysts.
To propose complementary strategies for practical applications and guide the design of highly efficient MoS₂ catalysts.

Main Methods:

Phase engineering and sulfur vacancy creation to enhance intrinsic HER performance.
Heterojunctions and doping as successful strategies to significantly improve HER activity.
Combining multiple strategies within a single electrocatalyst to achieve platinum-like performance.

Main Results:

Advanced MoS₂ catalysts demonstrate HER performance comparable to platinum.
Effective strategies include phase engineering, sulfur vacancies, heterojunctions, and doping.
Synergistic approaches are key to achieving state-of-the-art HER performance.

Conclusions:

MoS₂ is a promising material for efficient HER catalysis, rivaling platinum.
Further research directions include practical system assembly, application in other electrocatalytic reactions, and development of related 2D materials.
This review provides insights for developing next-generation MoS₂ HER electrocatalysts.