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Electrocatalytic activities of iron-supported N-doped porous carbon towards the oxygen/hydrogen evolution reaction

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  • Sam, Daniel Kobina
  • Cao, Yan

Abstract

Red mud (RM) disposal has been highly apprehensive due to its environmental impact. The aluminum industry produces large amounts of red mud waste annually, and turning it into a value-added product is a key component of sustainable development. This study combines RM with an N-doped porous carbon (biomass precursor) as an effective electrocatalyst for oxygen evolution and hydrogen evolution reactions (OER and HER). One significant obstacle to anion-exchange membrane (AEM) electrolyzer applications is the development of electrocatalysts that do not require noble metals and are both efficient and effective at HER and OER. The synthesized iron-supported (RM-derived) N-doped porous carbon (RMNPC) exhibits excellent catalytic activities with 276 and 191 mV overpotentials at 10 mA cm−2 for OER and HER, respectively. A two-electrode cell system is designed with an RMNPC/NF electrode as anode and cathode, and it necessitates just 1.82 V to realize 10 mA cm−2 and shows outstanding durability. This study presents a low-cost but effective electrocatalyst for water splitting for renewable hydrogen production, achieving the goal of RM recycling and highlighting the potential of porous carbon electrocatalysts.

Suggested Citation

  • Sam, Daniel Kobina & Cao, Yan, 2024. "Electrocatalytic activities of iron-supported N-doped porous carbon towards the oxygen/hydrogen evolution reaction," Renewable Energy, Elsevier, vol. 237(PC).
    • Handle: RePEc:eee:renene:v:237:y:2024:i:pc:s0960148124018561
    DOI: 10.1016/j.renene.2024.121788
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    References listed on IDEAS

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    1. Chenna Rao Borra, 2024. "Iron extracted from hazardous waste of aluminium production," Nature, Nature, vol. 625(7996), pages 665-667, January.
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    4. Davide Tonelli & Lorenzo Rosa & Paolo Gabrielli & Ken Caldeira & Alessandro Parente & Francesco Contino, 2023. "Global land and water limits to electrolytic hydrogen production using wind and solar resources," Nature Communications, Nature, vol. 14(1), pages 1-14, December.
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