Dual B and Fe doping boosts seawater oxidation on a Co <sub>3</sub> O <sub>4</sub> nanoarray

Direct seawater electrolysis has attracted intensive interest for the production of green hydrogen; however, the competing chlorine evolution reaction and oxygen evolution reaction lead to anode corrosion and thus limited durability. Here, B,Fe dual doping is proposed as an effective strategy to enhance its activity and the durability of the Co<sub>3</sub>O<sub>4</sub> nanoarray supported on nickel foam (B,Fe-Co<sub>3</sub>O<sub>4</sub>/NF) for alkaline seawater oxidation. At an industrial-scale current density of 1000 mA cm<sup>-2</sup>, the B,Fe-Co<sub>3</sub>O<sub>4</sub>/NF only needs an overpotential of 342 mV and operates stably for 500 h with negligible degradation and minimal active chlorine generation. Doping B and Fe synergistically enhances the catalytic activity, while B doping results in the formation of borate anions, which facilitate chloride ion repulsion.

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Publication Details

Journal
Chemical Communications
Published
2025-01-01
DOI
https://doi.org/10.1039/d5cc05698e
Citations
2
Primary Topic
Electrocatalysts for Energy Conversion
Type
article
Field-Weighted Citation Impact
0.73
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article

Dual B and Fe doping boosts seawater oxidation on a Co 3 O 4 nanoarray

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Electrocatalysts for Energy Conversion
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article

Dual B and Fe doping boosts seawater oxidation on a Co 3 O 4 nanoarray

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article en
2 citations

Abstract

Direct seawater electrolysis has attracted intensive interest for the production of green hydrogen; however, the competing chlorine evolution reaction and oxygen evolution reaction lead to anode corrosion and thus limited durability. Here, B,Fe dual doping is proposed as an effective strategy to enhance its activity and the durability of the Co<sub>3</sub>O<sub>4</sub> nanoarray supported on nickel foam (B,Fe-Co<sub>3</sub>O<sub>4</sub>/NF) for alkaline seawater oxidation. At an industrial-scale current density of 1000 mA cm<sup>-2</sup>, the B,Fe-Co<sub>3</sub>O<sub>4</sub>/NF only needs an overpotential of 342 mV and operates stably for 500 h with negligible degradation and minimal active chlorine generation. Doping B and Fe synergistically enhances the catalytic activity, while B doping results in the formation of borate anions, which facilitate chloride ion repulsion.

Chemical CommunicationsVol. 61(96)
Sichuan University (CN), Shandong Normal University (CN), West China Hospital of Sichuan University (CN), Islamic University of Madinah (SA), Laoshan Laboratory, King Khalid University (SA)
Openalex Percentile: Top 27%
Electrocatalysts for Energy Conversion
0.73
DOISourceOpenAlex
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