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Electrochemically synthesized H2O2 at industrial-level current densities enabled by in situ fabricated few-layer boron nanosheets

Author

Listed:
  • Yuhan Wu

    (Nanjing Forestry University)

  • Yuying Zhao

    (Chinese Academy of Forestry
    The University of Auckland)

  • Qixin Yuan

    (Nanjing Forestry University)

  • Hao Sun

    (Chinese Academy of Forestry)

  • Ao Wang

    (Chinese Academy of Forestry)

  • Kang Sun

    (Chinese Academy of Forestry)

  • Geoffrey I. N. Waterhouse

    (The University of Auckland)

  • Ziyun Wang

    (The University of Auckland)

  • Jingjie Wu

    (University of Cincinnati)

  • Jianchun Jiang

    (Chinese Academy of Forestry)

  • Mengmeng Fan

    (Nanjing Forestry University
    Chinese Academy of Forestry)

Abstract

Carbon nanomaterials show outstanding promise as electrocatalysts for hydrogen peroxide (H2O2) synthesis via the two-electron oxygen reduction reaction. However, carbon-based electrocatalysts that are capable of generating H2O2 at industrial-level current densities (>300 mA cm−2) with high selectivity and long-term stability remain to be discovered. Herein, few-layer boron nanosheets are in-situ introduced into a porous carbon matrix, creating a metal-free electrocatalyst (Bn-C) with H2O2 production rates of industrial relevance in neutral or alkaline media. Bn-C maintained > 95% Faradaic efficiency during a 140-hour test at 300 mA cm−2 and 0.1 V vs. RHE, and delivered a mass activity of 25.1 mol gcatalyst−1 h−1 in 1.0 M Na2SO4 using a flow cell. Theoretical simulations and experimental studies demonstrate that the superior catalytic performance originates from B atoms with adsorbed O atoms in the boron nanosheets. Bn-C outperforms all metal-based and metal-free carbon catalysts reported to date for H2O2 synthesis at industrial-level current densities.

Suggested Citation

  • Yuhan Wu & Yuying Zhao & Qixin Yuan & Hao Sun & Ao Wang & Kang Sun & Geoffrey I. N. Waterhouse & Ziyun Wang & Jingjie Wu & Jianchun Jiang & Mengmeng Fan, 2024. "Electrochemically synthesized H2O2 at industrial-level current densities enabled by in situ fabricated few-layer boron nanosheets," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-55071-7
    DOI: 10.1038/s41467-024-55071-7
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