IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v322y2025ics0360544225012320.html
   My bibliography  Save this article

Fe3+-mediated coal-assisted water electrolysis for hydrogen production: Evolution of coal structure oxidation via direct current and chaotic electric fields

Author

Listed:
  • Ma, Youcai
  • Xi, Shuangli
  • Li, Xiaoting
  • Li, Jingrui
  • Tao, Changyuan
  • Liu, Zuohua

Abstract

Understanding the interplay of electrical energy input strategies with coal and its influence on coal oxidation in coal-assisted water electrolysis for hydrogen production (CAWE) is pivotal for enhancing rates and deepening insights into its potential. In this study, coal was pretreated in an autoclave by adding Fe3+, the electrolytic characteristics and hydrogen production efficiency of coal-water slurry (CWS) before and after heat treatment under direct current (DC) and chaotic current (CC) electric fields were investigated. The results show that an increase in the hydrothermal treatment temperature leads to an enhancement in original reactivity of coal, with a maximum current density achievable up to 100 mA/cm2. Chaotic electric field can achieve a hydrogen purity of 99 % (I = 100 mA), and the cell voltage of CC is approximately 0.2 V lower compared to that of DC (I = 300 mA). Extension of electrolysis time results in increasing the content of C=O, COOH, and C-O on the coal surface after CC electrolysis, while the microcrystalline parameters decrease. The Fe3+/Fe2+ cycle is a crucial step in the CAWE, a mechanism is proposed for the impact of thermally enhanced Fe3+/Fe2+ cycling on coal particles and a possible pathway for the electrolysis of CWS.

Suggested Citation

  • Ma, Youcai & Xi, Shuangli & Li, Xiaoting & Li, Jingrui & Tao, Changyuan & Liu, Zuohua, 2025. "Fe3+-mediated coal-assisted water electrolysis for hydrogen production: Evolution of coal structure oxidation via direct current and chaotic electric fields," Energy, Elsevier, vol. 322(C).
    • Handle: RePEc:eee:energy:v:322:y:2025:i:c:s0360544225012320
    DOI: 10.1016/j.energy.2025.135590
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544225012320
    Download Restriction: Full text for ScienceDirect subscribers only
    File URL: https://libkey.io/10.1016/j.energy.2025.135590?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:322:y:2025:i:c:s0360544225012320. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.