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Synthesis and Performance Characterizations of Transition Metal Single Atom Catalyst for Electrochemical CO2 Reduction
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High-Performing Atomic Electrocatalyst for Chlorine Evolution Reaction.

Miran Ha1, Pandiarajan Thangavel1, Ngoc Kim Dang1

  • 1Center for Superfunctional Materials, Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea.

Small (Weinheim an Der Bergstrasse, Germany)
|February 16, 2023
PubMed
Summary
This summary is machine-generated.

Researchers developed a new platinum single-atom catalyst (Pt-1) for the chlorine evolution reaction (ClER). This catalyst offers high selectivity, durability, and exceptional activity for chlorine production, outperforming industrial standards.

Keywords:
N-doped graphenePt single atomschlorine evolution reactionelectrocatalystsmetal single atom catalysts

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • The chlorine evolution reaction (ClER) is crucial for chlor-alkali industries, driving a global demand for efficient and cost-effective catalysts.
  • Existing industrial catalysts for chlorine production face limitations in performance and cost, necessitating advancements in electrocatalyst design.

Purpose of the Study:

  • To develop a high-performing and selective electrocatalyst for the chlorine evolution reaction (ClER).
  • To investigate the catalytic activity and durability of platinum single atoms dispersed on nitrogen-doped graphene for ClER.

Main Methods:

  • Fabrication of a novel electrocatalyst (Pt-1) featuring uniformly dispersed platinum single atoms (SAs) within C2N2 moieties of N-doped graphene.
  • Electrochemical evaluation of Pt-1 for ClER, including selectivity, durability, and activity measurements.
  • Density functional theory (DFT) calculations to understand the reaction mechanism and predict catalytic performance.

Main Results:

  • Pt-1 demonstrated near 100% selectivity for ClER with remarkable long-term durability.
  • Achieved an extraordinary Cl2 production rate of 3500 mmol h−1 gPt−1 and >140,000-fold increased mass activity compared to industrial electrodes.
  • Required an ultralow overpotential of 5 mV at 1 mA cm−2 at 80 °C, aligning with DFT predictions.

Conclusions:

  • The developed Pt-1 electrocatalyst exhibits superior performance for ClER, addressing the demand for efficient chlorine production.
  • Pt-1 shows significant potential as a next-generation catalyst for industrial chlor-alkali processes due to its high activity and low overpotential.