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Simultaneous Ozone and Hydrogen Peroxide Electrosynthesis via Defect Modulation in Ni, Sb-doped SnO2 Electrocatalysts
  • +9
  • Lei Ding,
  • wenwen Li,
  • Mingzhe Xue,
  • Xiaoge Peng,
  • Huaijie Shi,
  • Jia Liu,
  • Xiaosa Wang,
  • Chenghang Jiang,
  • Yufeng Xue,
  • Shibin Wang,
  • Xing Zhong,
  • Jian-guo Wang
Lei Ding
Zhejiang University of Technology
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wenwen Li
Zhejiang University of Technology
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Mingzhe Xue
Zhejiang University of Technology
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Xiaoge Peng
Zhejiang University of Technology
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Huaijie Shi
Zhejiang University of Technology
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Jia Liu
Zhejiang University of Technology
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Xiaosa Wang
Zhejiang University of Technology
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Chenghang Jiang
Zhejiang University of Technology
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Yufeng Xue
Zhejiang University of Technology College of Chemical Engineering
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Shibin Wang
Zhejiang University of Technology
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Xing Zhong
Zhejiang University of Technology
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Jian-guo Wang
Zhejiang University of Technology

Corresponding Author:[email protected]

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Abstract

Electrochemical synthesis of green oxidants O3 and H2O2 is valuable for applications, but challenges persist in enhancing the O3 and H2O2 generation activity and combined application. Herein, we modulate the surface Ni active sites and oxygen vacancy defects content in Ni-Sb-SnO2 electrocatalysts to enhance selectivity for electrochemical ozone generation (EOP) and two-electron electrochemical oxygen reduction reactions (2e⁻ ORR). The Ni active sites and oxygen vacancy defects enriched electrocatalysts resulting in an ozone faradaic efficiency of 48.1%, while non-enriched electrocatalyst obtained 90% selectivity for H2O2. Theoretical calculations revealed that Ni-Sb-SnO2 efficiently captures O2 with defective Ovac2 stabilize intermediates, facilitating O3 and H2O2 synthesis. Moreover, concerted EOP and 2e⁻ ORR enable concurrent generation of O3 and H2O2 for efficient synergistic degradation of organic pollutants, while attenuating the energy demands of the electrolyzer. This study provides an appealing strategy for the simultaneous production of O3 and H2O2 with applications in wastewater treatment.
21 Aug 2023Submitted to AIChE Journal
24 Aug 2023Review(s) Completed, Editorial Evaluation Pending
24 Aug 2023Submission Checks Completed
24 Aug 2023Assigned to Editor
31 Aug 2023Reviewer(s) Assigned
14 Sep 2023Editorial Decision: Revise Minor
23 Sep 20231st Revision Received
25 Sep 2023Submission Checks Completed
25 Sep 2023Assigned to Editor
25 Sep 2023Review(s) Completed, Editorial Evaluation Pending
01 Oct 2023Editorial Decision: Revise Minor
02 Oct 20232nd Revision Received
05 Oct 2023Submission Checks Completed
05 Oct 2023Assigned to Editor
05 Oct 2023Review(s) Completed, Editorial Evaluation Pending
07 Oct 2023Editorial Decision: Revise Major
17 Oct 20233rd Revision Received
22 Oct 2023Submission Checks Completed
22 Oct 2023Assigned to Editor
22 Oct 2023Review(s) Completed, Editorial Evaluation Pending
23 Oct 2023Reviewer(s) Assigned
13 Nov 2023Editorial Decision: Accept