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Related Experiment Video

Updated: Aug 15, 2025

Synthesis of Metal Nanoparticles Supported on Carbon Nanotube with Doped Co and N Atoms and its Catalytic Applications in Hydrogen Production
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Sodium-Directed Photon-Induced Assembly Strategy for Preparing Multisite Catalysts with High Atomic Utilization

Xiaoqiang An1, Tingcha Wei1,2, Peijia Ding3

  • 1Center for Water and Ecology, State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China.

Journal of the American Chemical Society
|January 6, 2023
PubMed
Summary
This summary is machine-generated.

A novel sodium-directed photon-induced assembly strategy enhances single-atom catalysts (SACs) by creating multiple gold sites on TiO2. This approach significantly boosts hydrogen evolution activity, offering a new platform for advanced catalysis.

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Area of Science:

  • Materials Science
  • Catalysis
  • Nanotechnology

Background:

  • Single-atom catalysis (SACs) faces challenges in precisely regulating atomic-level active sites.
  • Integrating diverse reaction sites is a promising strategy to overcome limitations in current catalytic systems.

Purpose of the Study:

  • To develop a novel strategy for enhancing the atomic utilization efficiency of single-atom catalysts (SACs).
  • To construct multifarious gold (Au) sites on a titanium dioxide (TiO2) substrate using a photon-induced assembly method.

Main Methods:

  • Utilized a sodium-directed photon-induced assembly (SPA) strategy.
  • Employed Na+ as a directing agent for Au single atoms onto TiO2.
  • Leveraged light-induced electron transfer for self-assembly of Au nanoclusters and exploited plasmonic near-field and Schottky junction effects.

Main Results:

  • Achieved a significant improvement in hydrogen evolution activity, nearly two orders of magnitude higher than previous reports.
  • Demonstrated a high turnover frequency (TOF) of 1533 h⁻¹ for the dual-site photocatalysts.
  • Showcased the enhancement of charge separation through the synergism of plasmonic near-field, Schottky junction, and oxygen vacancies.

Conclusions:

  • The SPA strategy effectively boosts atomic utilization efficiency and catalytic performance of SACs.
  • The developed dual-site photocatalysts show superior hydrogen evolution activity under simulated solar light.
  • The SPA method is versatile and can be extended to synthesize various metal-coupled nanostructures for diverse catalytic applications.