Flexible Iron Clusters Promoting Ammonia Synthesis: A Density Functional Theory Prediction

Area of Science:

• Materials Science
• Catalysis
• Computational Chemistry

Background:

• Supported clusters offer high dispersion and atomic efficiency for catalysis.
• Ammonia synthesis is crucial for sustainable agriculture and industry.
• Iron clusters are promising catalysts but require optimization.

Purpose of the Study:

• To investigate the catalytic performance of flexible iron clusters in 2D carbon-nitrogen materials for ammonia synthesis.
• To understand the role of structural flexibility in enhancing catalytic activity.
• To introduce a new descriptor for N2 bond cleavage.

Main Methods:

• Density Functional Theory (DFT) simulations.
• Ab initio molecular dynamics simulations.
• Analysis of radial distribution functions to define a flexibility coefficient.

Main Results:

• Flexible iron clusters exhibit enhanced catalytic activity for ammonia synthesis.
• Structural flexibility lowers energy barriers for N2 activation and hydrogenation.
• The flexibility coefficient effectively describes N2 bond cleavage.

Conclusions:

• Adaptive structural modification of flexible Fe clusters is key to efficient ammonia synthesis.
• This work provides a new strategy for designing advanced catalysts based on structural flexibility.
• The findings contribute to developing sustainable and energy-efficient ammonia production methods.