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Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
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Inserted-B atoms modulating electronic structure of Pt enhancing hydrogen evolution under Universal-pH.

Haoran Jiang1, Yong Xiao1, Zhirang Liu1

  • 1College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108 China.

Journal of Colloid and Interface Science
|January 17, 2025
PubMed
Summary

We developed a novel boron-doped platinum catalyst (Pt80B20/C) for efficient hydrogen evolution reaction (HER) across all pH levels. This advanced electrocatalyst demonstrates superior performance and durability compared to commercial platinum catalysts.

Keywords:
Electronic structureHydrogen evolution reactionOrbital hybridizationPt-based catalystsWater splittinguniversal-pH

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • High-performance electrocatalysts are crucial for green hydrogen production via the hydrogen evolution reaction (HER).
  • Achieving efficient and durable HER across all pH conditions (acidic, neutral, and alkaline) remains a significant challenge.
  • Tuning catalyst properties through doping offers a promising strategy to overcome these limitations.

Purpose of the Study:

  • To develop a novel electrocatalyst for efficient and durable hydrogen evolution reaction (HER) across a wide pH range.
  • To investigate the effect of boron doping on platinum's electronic structure and HER performance.
  • To understand the mechanism of enhanced HER activity in acidic, neutral, and alkaline media.

Main Methods:

  • Synthesis of boron-doped platinum catalysts (Pt80B20/C) with controlled boron content.
  • Electrochemical characterization of HER performance, including overpotential measurements in different pH electrolytes.
  • Durability testing of the catalyst through prolonged electrolysis.
  • Theoretical calculations (e.g., DFT) to elucidate the electronic structure and catalytic mechanism.

Main Results:

  • The optimized Pt80B20/C catalyst exhibited excellent HER performance with low overpotentials: 7 mV (acidic), 37 mV (alkaline), and 47 mV (neutral).
  • The catalyst demonstrated remarkable stability, with negligible performance decay after 100 hours of electrolysis, outperforming commercial Pt/C.
  • Theoretical analysis confirmed that boron doping optimizes the electronic structure of platinum, enhancing hydrogen intermediate adsorption/desorption and facilitating water dissociation.

Conclusions:

  • Boron doping is an effective strategy to engineer platinum-based electrocatalysts for superior HER performance across all pH values.
  • The Pt80B20/C catalyst offers a promising alternative to commercial catalysts for large-scale green hydrogen production.
  • Understanding the electronic interactions between boron and platinum provides insights for designing next-generation electrocatalysts.