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Updated: May 24, 2025
10:52
Multiscale Sampling of a Heterogeneous Water/Metal Catalyst Interface using Density Functional Theory and Force-Field Molecular Dynamics
Published on: April 12, 2019
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Single-Atom Saturation: A Fundamental Principle for Single-Atom-Site Catalyst Design.
Chunjin Ren1,2, Yu Cui1, Qiang Li1
1Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, China.
Journal of the American Chemical Society
|March 4, 2025
Summary
A new principle, single-atom saturation (SSA), quantifies intermediate binding on single-atom alloys (SAAs) for electrocatalyst design. This descriptor predicts catalytic activity for reactions like CO2 reduction and H2 evolution.
Area of Science:
- Materials Science
- Electrochemistry
- Catalysis
Background:
- Single-atom alloys (SAAs) offer unique advantages over traditional alloys and single-atom catalysts.
- Designing effective SAAs for specific catalytic reactions remains a challenge due to a lack of guiding principles.
Purpose of the Study:
- To introduce a fundamental principle, single-atom saturation (SSA), for quantifying intermediate binding strength on SAAs.
- To enable rapid and qualitative evaluation of catalytic activity across diverse reactions.
- To provide a basis for designing high-performance single-atom catalysts.
Main Methods:
- Developed the single-atom saturation (SSA) descriptor by integrating electronic (d electron occupancy) and geometric (coordination) factors of single atoms.
- Considered the influence of host atom type and intermediate adsorption configurations.
- Applied SSA to predict catalytic activities for various reactions, including CO2 reduction, N2 reduction, O2 evolution/reduction, and H2 evolution.
Main Results:
- SSA effectively quantifies binding strength and predicts catalytic activity for SAAs.
- Specific SAA compositions (e.g., Pd1Cu(111), Pt1Cu(111)) were identified as promising for key electrochemical reactions.
- The SSA principle demonstrated high accuracy when applied to nitrogen-doped graphene-supported single-atom catalysts (SACs).
Conclusions:
- Single-atom saturation (SSA) is a concise, interpretable, and universal descriptor for understanding structure-activity relationships in SAAs.
- SSA offers a fundamental and simplified approach for designing superior single-atom site catalysts.
- This work establishes a new paradigm for rational catalyst design in electrocatalysis.
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