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  Largely Enhanced Oxygen Evolution Performance in a Ferromagnetic Ruddlesden–Popper Phase Cobaltate

Meng, Z., Qi, Y., Qin, P., Zhou, X., Wang, X., Chen, H., et al. (2025). Largely Enhanced Oxygen Evolution Performance in a Ferromagnetic Ruddlesden–Popper Phase Cobaltate. Nano Letters, 25(12), 4887-4894. doi:10.1021/acs.nanolett.5c00061.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0010-F0CF-6 Version Permalink: https://hdl.handle.net/21.11116/0000-0010-F0D2-1
Genre: Journal Article

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Supporting Information: Experimental methods; theoretical calculation; XPS analysis; electrical resistance measurements; repeat and reliability experiments; OER test at pH 14
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 Creators:
Meng, Z.1, Author
Qi, Y.1, Author
Qin, P.1, Author
Zhou, X.1, Author
Wang, X.1, Author
Chen, H.1, Author
Liu, L.1, Author
Zhao, G.1, Author
Duan, Z.1, Author
Liu, J.1, Author
Zhang, Q.2, Author
Tang, P.1, 3, 4, Author           
Liu, Z.1, Author
Affiliations:
1School of Materials Science and Engineering, Beihang University, ou_persistent22              
2Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, ou_persistent22              
3Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
4Center for Free-Electron Laser Science, ou_persistent22              

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Free keywords: magnetocatalysis, oxygen evolution reaction, La2CoO4, ferromagnetic oxides
 Abstract: The oxygen evolution reaction (OER), as a key half-reaction in water splitting, plays a critical role in various energy conversion and storage systems. Novel high-performance catalysts have always been desirable. In this work, we have fabricated insulating perovskite LaCoO3 and its corresponding Ruddlesden–Popper (RP) phase La2CoO4 films. At room temperature, the perovskite LaCoO3 films are nonmagnetic while the RP phase La2CoO4 films are ferromagnetic. The magnetic RP phase La2CoO4 thin films exhibit significantly higher OER activities, with a nearly 70-fold increase in current density compared to the perovskite LaCoO3. Theoretical calculations indicate that the ferromagnetic order in the RP phase film substantially lowers the OER overpotential. This study highlights the potential of RP phase magnetic cobaltates for electrochemical water oxidation and magnetocatalysis applications.

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Language(s): eng - English
 Dates: 2025-03-112025-01-032025-03-132025-03-172025-03-26
 Publication Status: Issued
 Pages: 8
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.nanolett.5c00061
 Degree: -

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Project name : Z.L. acknowledges financial support from Beijing Natural Science Foundation (no. JQ23005). Z.L. acknowledges financial support from National Key R&D Program of China (no. 2022YFA1602700). Z.L., P.T., and P.Q. acknowledge financial support from Fundamental Research Funds for the Central Universities. Z.L. acknowledges financial supports from National Natural Science Foundation of China (nos. 52425106 and 52271235). Z.L. acknowledges financial support from National Key R&D Program of China (no. 2022YFB3506000). P.Q. acknowledges financial support from National Natural Science Foundation of China (no. 52401300). Z.L. acknowledge financial support from National Natural Science Foundation of China (no. 52121001). P.T. acknowledges financial supports from National Natural Science Foundation of China (nos. 12234011 and 12374053). P.Q. acknowledges funding from China National Postdoctoral Program for Innovative Talents (no. BX20230451) and from China Postdoctoral Science Foundation (no. 2024M754058). Z.M. acknowledges financial support from National Natural Science Foundation of China (no. 524B2003). The authors acknowledge Dr. Qiao Jin and Dr. Erjia Guo at Chinese Academy of Sciences for their help in collecting the x-ray diffraction data.
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Title: Nano Letters
  Abbreviation : Nano Lett.
Source Genre: Journal
 Creator(s):
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 25 (12) Sequence Number: - Start / End Page: 4887 - 4894 Identifier: ISSN: 1530-6984
CoNE: https://pure.mpg.de/cone/journals/resource/110978984570403