Self-Supporting np-AlFeNiO Bifunctional Electrode Material for Electrochemical Water Splitting Prepared by Electrooxidation

Zhihui Ma, Wence Xu, Zhonghui Gao, Yanqin Liang, Hui Jiang, Zhaoyang Li, Zhenduo Cui, Huifang Zhang () and Shengli Zhu ()
Additional contact information
Zhihui Ma: School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
Wence Xu: School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
Zhonghui Gao: School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
Yanqin Liang: School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
Hui Jiang: School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
Zhaoyang Li: School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
Zhenduo Cui: School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
Huifang Zhang: College of Environmental Engineering, Xuzhou Institute of Technology, Xuzhou 221000, China
Shengli Zhu: School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China

Energies, 2024, vol. 17, issue 7, 1-14

Abstract: Hydrogen production through water splitting is a promising path to develop renewable green energy. Effective, stable, and low-cost catalysts are the key to water splitting. In the present work, a series of self-supporting nanoporous alloys are prepared by using a dealloying process followed by electrooxidation. Among them, the np-AlFeNiO-4s sample exhibits remarkable activity (10 mA cm −2 at 32 mV for the HER and 278 mV for the OER) and good long-term stability (100 h) in alkaline conditions for both the HER and the OER. It only requires 1.56 V to reach 10 mA cm −2 current density for total water splitting performance. The very short time of electrooxidation can significantly improve the HER performance. Electrooxidation makes the metal and metal oxide sites on the electrode surface effectively coupled, which greatly enhances the kinetic rate of the Volmer and Heyrovsky steps. Appropriate electrooxidation is a rapid and easy way to improve the activity of the electrocatalyst, which has a broad application prospect in electrochemical water splitting.

Keywords: self-supporting; bifunctional electrocatalyst; oxidation; hydrogen evolution reaction (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/17/7/1591/pdf (application/pdf)
https://www.mdpi.com/1996-1073/17/7/1591/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:17:y:2024:i:7:p:1591-:d:1364322

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().