Abstract / Description of output
Seawater electrolysis under alkaline conditions is a crucial technology for sustainable hydrogen production. However, achieving the long-term stability of the electrocatalyst remains a significant challenge. In this study, it is demonstrated that surface reconstruction of a transition metal nitride (TMN) can be used to develop a highly stable oxygen evolution reaction (OER) electrocatalyst. Rapid introduction of phosphate groups (PO43−) accelerates the in situ surface reconstruction of Ni3FeN, generating a catalyst, with a conductive nitride core and Cl−-resistant hydroxide shell that demonstrates outstanding performance, maintaining stability for over 2500 h at 1 A cm−2 current density in alkaline seawater. In situ characterization and density functional theory (DFT) calculations reveal the dynamic evolution of active sites, providing insights into the mechanisms driving long-term stability. This work not only introduces an efficient approach to TMN-based catalyst design but also advances the development of durable electrocatalysts for industrial-scale seawater hydrogen production.
Original language | English |
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Journal | Advanced Materials |
Early online date | 25 Nov 2024 |
DOIs | |
Publication status | E-pub ahead of print - 25 Nov 2024 |
Keywords / Materials (for Non-textual outputs)
- durability
- electrocatalysis
- oxygen evolution reaction
- seawater splitting
- transition metal nitride