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Cited by 39Innovative Energy Harvesting TechnologiesAdvanced Sensor and Energy Harvesting MaterialsWave and Wind Energy Systems

Harvesting Ocean Wave Energy via Magnetoelastic Generators for Self-Powered Hydrogen Production

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Ock, Il Woo, Zhou, Yihao, Zhao, Xun, Manshaii, Farid, Chen, Jun·2024·ACS Energy Letters
DOI 10.1021/acsenergylett.4c00412PMC PMC12393815
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Abstract

Extracting energy from ocean waves for electrolysis, while highly desirable, poses significant challenges, especially in achieving high current generation for sustainable water splitting. This work introduces an innovative high-current ocean wave energy harvesting system, employing a self-floating magnetoelastic generator (MEG) ball network designed for autonomous seawater electrolysis and on-site hydrogen (H 2 ) production. Leveraging the magnetoelastic effect, the MEG ball network is naturally waterproof and can generate a high current density of 0.24 mA cm –2, paired with a low internal resistance of 9 Ω at a wave frequency of 2 Hz. Its spherical design ensures exceptional mechanical durability, maintaining consistent electrical output even under extremely humid and harsh conditions. In practical applications, this MEG ball network system can continuously produce H 2 at a rate of 0.76 × 10 –3 mL min –1 . These results underscore its potential as a viable technology for on-site seawater electrolysis and large-scale H 2 production.

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  • The output performance of the series-connected MEG balls linearly increases with the number, reaching a maximum voltage of 21.17 V when there are eight balls.

    “The output performance of the series-connected balls linearly increases with the number, reaching a maximum voltage of 21.17 V when there are eight balls.”

    From Advances in Blue Energy Fuels: Harvesting Energy from Ocean for Self‐Powered Electrolysis (2025) · cites this paper as [236]

  • Ock et al. innovated a self-powered seawater-splitting system using a MEG-based ball network to address the low voltage limitation.

    “In Figure 7k, Ock et al. [236] have innovated a self-powered seawater-splitting system using a MEG-based ball network to address the low voltage limitation.”

    From Advances in Blue Energy Fuels: Harvesting Energy from Ocean for Self‐Powered Electrolysis (2025) · cites this paper as [236]

  • The self-powered MEG-based seawater-splitting system, driven by ocean wave energy, decomposes water into H2 and O2 using a Pt(cathode)-Pt(anode) two-electrode electrochemical cell in 3.5 wt% NaCl electrolyte, achieving a H2 production rate of 0.76 × 10-3 mL min-1.

    “The self-powered MEG-based seawater-splitting system, driven by ocean wave energy (Figure 7o), decomposes water into H 2 and O 2 using a Pt(cathode)-Pt(anode) two-electrode electrochemical cell in 3.5 wt% NaCl electrolyte, achieving a H 2 production rate of 0.76 × 10 -3 mL min -1 (Figure 7p).”

    From Advances in Blue Energy Fuels: Harvesting Energy from Ocean for Self‐Powered Electrolysis (2025) · cites this paper as [236]

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Cited by

Sorted by citations

Authors
Ock, I. W., Zhou, Y., Zhao, X., Manshaii, F., & Chen, J.
Affiliations
University of California, Los Angeles (US)
Corresponding author
Chen, Jun
ORCID
Venue
ACS Energy Letters
Publisher
American Chemical Society (ACS)
Published
2024-03-25
Volume
9
Issue
4
Pages
1701-1709
ISSN
2380-8195 (ISSN-L)
DOI
10.1021/acsenergylett.4c00412
PMC
PMC12393815
OpenAlex
W4393161807
Cited by
39
References
3
Citations by year
2026: 11 · 2025: 20 · 2024: 8
FWCI
5.22
Type
journal article
Language
en
Open access
Licence
Locations
  • ACS Energy Letters (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Center for Advancing Translational Sciences (KL2TR001882)
  • University of California, Los Angeles
  • American Heart Association (23IPA1054908, 23SCEFIA1157587, 23TPA1141360)
  • National Research Foundation of Korea (2021R1A6A3A14045141)
  • Office of Naval Research (N00014-24-1-2065)
  • Brain and Behavior Research Foundation (30944)
  • Henry Samueli School of Engineering and Applied Science, University of California, Los Angeles
  • National Institutes of Health (R01 CA287326)
Topics
  • Physical Sciences › Engineering › Mechanical Engineering › Innovative Energy Harvesting Technologies
  • Physical Sciences › Engineering › Biomedical Engineering › Advanced Sensor and Energy Harvesting Materials
  • Physical Sciences › Engineering › Ocean Engineering › Wave and Wind Energy Systems
Keywords
wave energy conversion, seawater electrolysis, water splitting, high current density, on-site hydrogen generation

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