Support-free iridium hydroxide for high-efficiency proton-exchange membrane water electrolysis

Yubo Chen (), Chencheng Dai, Qian Wu, Haiyan Li, Shibo Xi, Justin Zhu Yeow Seow, Songzhu Luo, Fanxu Meng, Yaolong Bo, Yanghong Xia, Yansong Jia, Adrian C. Fisher and Zhichuan J. Xu ()
Additional contact information
Yubo Chen: Zhejiang University
Chencheng Dai: Nanyang Technological University
Qian Wu: Nanyang Technological University
Haiyan Li: Zhejiang University
Shibo Xi: Agency for Science Technology and Research (A*STAR)
Justin Zhu Yeow Seow: Nanyang Technological University
Songzhu Luo: Nanyang Technological University
Fanxu Meng: Nanyang Technological University
Yaolong Bo: Zhejiang University
Yanghong Xia: Zhejiang University
Yansong Jia: Zhejiang University
Adrian C. Fisher: The Cambridge Centre for Advanced Research and Education in Singapore
Zhichuan J. Xu: Nanyang Technological University

Nature Communications, 2025, vol. 16, issue 1, 1-10

Abstract: Abstract The large-scale implementation of proton-exchange membrane water electrolyzers relies on high-performance membrane-electrode assemblies that use minimal iridium (Ir). In this study, we present a support-free Ir catalyst developed through a metal-oxide-based molecular self-assembly strategy. The unique self-assembly of densely isolated single IrO6H8 octahedra leads to the formation of μm-sized hierarchically porous Ir hydroxide particles. The support-free Ir catalyst exhibits a high turnover frequency of 5.31 s⁻¹ at 1.52 V in the membrane-electrode assembly. In the corresponding proton-exchange membrane water electrolyzer, notable performance with a cell voltage of less than 1.75 V at 4.0 A cm⁻² (Ir loading of 0.375 mg cm⁻²) is achieved. This metal-oxide-based molecular self-assembly strategy may provide a general approach for the development of advanced support-free catalysts for high-performance membrane-electrode assemblies.

Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-025-58019-7 Abstract (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:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-58019-7

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-025-58019-7

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().