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Catalytic N2-to-NH3 (or -N2H4) Conversion by Well-Defined Molecular Coordination Complexes
Matthew J Chalkley1, Marcus W Drover1, Jonas C Peters1
1Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States.
Researchers are making progress in molecular nitrogen fixation, developing catalysts to convert nitrogen (N₂) into ammonia (NH₃) for industrial and biological applications. This review covers historical advances and future challenges in this critical chemical transformation.
Area of Science:
- Inorganic Chemistry
- Catalysis
- Biochemistry
Background:
- Nitrogen fixation (N₂ to NH₃) is a vital yet challenging chemical process.
- Understanding biological nitrogenases and industrial processes are key drivers for research.
- Significant advancements have been made in developing molecular catalysts for N₂ reduction.
Purpose of the Study:
- To review mechanistic understanding of nitrogen fixation.
- To highlight advances in molecular catalysts for N₂ to NH₃ conversion.
- To discuss historical developments and future challenges in the field.
Main Methods:
- Historical review of N₂ functionalization chemistry.
- Comprehensive overview of d-block compounds as catalysts (up to 2019).
- Analysis of mechanistic insights and catalytic performance (yields, efficiencies, rates).
Main Results:
- Development of the first bona fide molecular catalyst systems for N₂ reduction.
- Progress in understanding the mechanisms of molecular nitrogen fixation.
- Increasingly appealing molecular alternatives to traditional industrial nitrogen fixation.
Conclusions:
- Lessons learned from extensive research efforts in molecular nitrogen fixation.
- Identification of key remaining challenges in catalyst design and efficiency.
- Continued pursuit of improved catalysts for sustainable ammonia production.
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