UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Dynamic Reconstruction of Crystal/Amorphous Hetero-Phosphate Janus Interfaces for Highly Stable Seawater Splitting

Tian, Pengfei; Zong, Wei; Xiong, Jin; Liu, Wei; Liu, Jingquan; Dai, Yuhang; Zhu, Jiexin; ... Han, Ning; + view all (2025) Dynamic Reconstruction of Crystal/Amorphous Hetero-Phosphate Janus Interfaces for Highly Stable Seawater Splitting. Advanced Functional Materials , Article 2504862. 10.1002/adfm.202504862. (In press).

[thumbnail of He_Dynamic Reconstruction of CrystalAmorphous Hetero-Phosphate Janus Interfaces for Highly Stable Seawater Splitting.pdf] Text
He_Dynamic Reconstruction of CrystalAmorphous Hetero-Phosphate Janus Interfaces for Highly Stable Seawater Splitting.pdf
Access restricted to UCL open access staff until 6 May 2026.

Download (1MB)

Abstract

The abundant seawater resources provide favorable advantages for the large-scale application of seawater electrolysis to produce hydrogen. However, the catalysts are prone to triggering the chlorine evolution reaction (CER) and are easily corroded by Cl−, which are key challenges that need urgent resolution in seawater electrolysis technology. Here, a crystal/amorphous heterostructure bifunctional composite catalyst (caMo-NiFePO/NMF) for seawater splitting is synthesized through in situ etching and phosphorylation. The incorporation of Mo facilitates the formation of crystalline-amorphous interfaces and adjusts the Fe electronic states and d-band centers, thereby boosting the adsorption capacity of *OOH intermediates and the repulsion of Cl−, forming a dynamic *OOH-rich, Cl−-poor Janus interface. This enhances catalytic activity and prevents catalyst deep reconstruction toward hydroxyl metal oxide, leading to highly stable and effective seawater splitting. Noteworthy, the caMo-NiFePO/NMF requires a low overpotential of 328 mV to reach 500 mA cm−2 in alkaline seawater for oxygen evolution reaction (OER), avoiding triggering CER. It also shows excellent activity with 327 mV to 500 mA cm⁻² in alkaline seawater for hydrogen evolution reaction (HER). As a bifunctional catalyst, caMo-NiFePO/NMF demonstrates excellent performance with a cell potential of 1.7 V to achieve 100 mA cm⁻² in alkaline seawater, maintaining remarkable stability over 1000 h.

Type: Article
Title: Dynamic Reconstruction of Crystal/Amorphous Hetero-Phosphate Janus Interfaces for Highly Stable Seawater Splitting
DOI: 10.1002/adfm.202504862
Publisher version: https://doi.org/10.1002/adfm.202504862
Language: English
Additional information: This version is the author-accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Janus Interfaces; dynamical reconstruction phosphate; Mo doped, crystalline amorphous heterostructures; seawater splitting
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery.ucl.ac.uk/id/eprint/10209232
Downloads since deposit
2Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item