On-site catalytic wastewater remediation by sustainably produced H2O2 via scalable single-atomic Fe-incorporated Janus membrane

Yuhan Wu, Yifei Wang, Ruyan Chen, Jiaqing Xu, Hangyuan Zhang, Yifan Ding, Beibei Li, Shuying Dong, Shixue Dou, Xiao Zhang, Jingyu Sun, Jianhui Sun

Research output: Journal article publicationJournal articleAcademic researchpeer-review

1 Citation (Scopus)

Abstract

Electrosynthesis of hydrogen peroxide (H2O2) from oxygen is a green and sustainable route toward on-site wastewater treatment. Nevertheless, the performance mismatch of the catalyst species and gas-diffusion components gives rise to low O2 utilization efficiency and limited H2O2 production rate in a practical cell. Herein, we propose a flexible and scalable Janus electrode comprising hydrophilic single-atomic Fe-incorporated catalytic layer and hydrophobic gas-attraction layer. The hydrophobic layer enables efficient oxygen diffusion, and the hollow-structured catalysts allow oxygen gas trapping with a high local oxygen concentration, resulting in a high Faradaic efficiency and fast H2O2 production rate. Accordingly, an 80 h electrocatalytic H2O2 synthesis could be gained at 80 mA cm−2. The Janus electrode delivers a H2O2 selectivity of 92% and a yield of 592 mmol g−1 h−1 in a flow cell. The thus-produced H2O2 allows for an in situ antibiotic removal, with the potential for on-site eco-restoration.
Original languageEnglish
Article number123533
JournalApplied Catalysis B: Environmental
Volume343
DOIs
Publication statusPublished - Apr 2024

Keywords

  • H O electrosynthesis
  • Janus membrane
  • Scalable
  • Single-atomic Fe
  • Wastewater remediation

ASJC Scopus subject areas

  • General Environmental Science
  • Process Chemistry and Technology
  • Catalysis

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