Single Metal Atom Catalysts Prepared by Diluted Atomic Layer Deposition.

Area of Science:

• Materials Science
• Catalysis
• Nanotechnology

Background:

• Scalable synthesis of single-atom catalysts is a significant challenge in materials science.
• Current methods often lack precise control over metal loading and precursor utilization.

Purpose of the Study:

• To introduce a novel, scalable, and facile method for synthesizing supported metal catalysts with tunable loadings.
• To demonstrate the synthesis of single-atom catalysts using the new approach.

Main Methods:

• Developed diluted atomic layer deposition (DALD) using a diluted precursor mixture of organometallic precursors and free ligands.
• Applied DALD to synthesize Ir, Rh, and Pt catalysts on γ-Al2O3 supports.
• Controlled metal precursor ratios to tune catalyst structures from nanoparticles to single atoms.

Main Results:

• DALD enables precise control over metal loadings on catalyst supports.
• The method successfully synthesized isolated single-atom catalysts and nanoparticles.
• Demonstrated high efficiency in metal precursor utilization.

Conclusions:

• DALD is a simple, efficient, and scalable strategy for producing supported metal catalysts, including single-atom catalysts.
• This approach facilitates the integration of single-atom catalysts into industrial processes.
• DALD offers precise control over catalyst structure and loading.