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Simple "Directional Trimming" Strategy Engineered Platinum Atomic Clusters with Controllable Coordination Numbers for

Fengkun Hao1,2, Jing Zhong3, Fengqian Hao3

  • 1Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences (Beijing), Beijing, 100083, China.

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|March 26, 2025
PubMed
Summary
This summary is machine-generated.

Researchers developed a "directional trimming" strategy to tune atomic cluster (AC) catalysts by controlling coordination number (CN). This method optimizes hydrogen evolution reaction (HER) catalysts, with Pt/CB-90 showing superior performance and recyclability.

Keywords:
Atomic clustersCoordination numberElectrocatalystsEngineering of coordination structureHydrogen evolution reaction

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Area of Science:

  • Materials Science
  • Catalysis
  • Electrochemistry

Background:

  • Coordination number (CN) in atomic cluster (AC) catalysts offers tunable catalytic performance.
  • The precise relationship between CN and catalytic activity in ACs is not fully understood.

Purpose of the Study:

  • To develop a "directional trimming" strategy for synthesizing AC catalysts with controlled CN.
  • To establish an inverted volcano curve explaining the effect of CN on the hydrogen evolution reaction (HER).
  • To investigate the HER performance of AC catalysts with varying CN.

Main Methods:

  • Synthesis of AC catalysts using a "directional trimming" strategy.
  • Electrochemical characterization of catalysts for HER activity.
  • Theoretical calculations to understand the role of CN in catalysis.

Main Results:

  • A series of AC catalysts with a wide range of CN were successfully synthesized.
  • Pt/CB-90, with a moderate CN of 3.7, demonstrated a low overpotential (22.94 mV at 10 mA cm⁻²) and high mass activity (25x commercial Pt/C).
  • The synthesis strategy is atom-efficient, recyclable (up to 20 times), and widely applicable.

Conclusions:

  • The study establishes a clear link between CN and HER activity, explained by an inverted volcano curve.
  • Optimized CN is crucial for enhancing HER performance in AC catalysts.
  • The findings provide fundamental insights for designing efficient AC catalysts for various reactions.