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Modulating coal-derived carbon toward electrocatalytic generation of hydroxyl radicals for organic contaminant removal

Journal of Materials Chemistry A, ISSN: 2050-7496, Vol: 12, Issue: 12, Page: 7227-7236
2024
  • 4
    Citations
  • 0
    Usage
  • 7
    Captures
  • 1
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    4
  • Captures
    7
  • Mentions
    1
    • News Mentions
      1
      • 1

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Findings from China University of Geosciences Broaden Understanding of Chemicals and Chemistry (Modulating Coal-derived Carbon Toward Electrocatalytic Generation of Hydroxyl Radicals for Organic Contaminant Removal)

2024 MAR 27 (NewsRx) -- By a News Reporter-Staff News Editor at Chemicals & Chemistry Daily Daily -- Fresh data on Chemicals and Chemistry are

Article Description

The three-electron oxygen reduction reaction (3e ORR), which consists of the electrochemical production of hydrogen peroxide (HO) and the subsequent activation, allows for the facile generation of hydroxyl radicals (˙OH) for environmental remediation. However, the current understanding on designing the corresponding electrocatalyst is not adequate. Herein, carbon-based electrocatalysts are prepared using bituminous coal as the raw material to obtain a high content of oxygen, which is crucial for HO production, and the oxygen-containing functional groups (OFGs) in the electrocatalyst are modulated to improve the ˙OH production efficiency. Experimental and calculation results demonstrate that C 00000000 00000000 00000000 00000000 11111111 00000000 11111111 00000000 00000000 00000000 O groups serve as active sites for not only HO formation but also the activation of HO to produce ˙OH, while HO desorption and HO activation are more favorable at COOH and C O sites, respectively. Therefore, after deliberately removing COOH groups from the coal-derived carbon surface, the ˙OH production efficiency is increased, leading to the fast removal of organic dyes from water. Our results demonstrate the significance of modulating the surface OFGs on the carbon-based electrocatalyst toward efficient ˙OH production from the 3e ORR, which provides a green and sustainable route toward organic contaminant removal from water.

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