Engineered Nickel-Iron Nitride Electrocatalyst for Industrial-Scale Seawater Hydrogen Production.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 39584400.
- Also identified by DOI 10.1002/adma.202415421.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
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 (PO<sub>4</sub> <sup>3-</sup>) accelerates the in situ surface reconstruction of Ni<sub>3</sub>FeN, generating a catalyst, with a conductive nitride core and Cl<sup>-</sup>-resistant hydroxide shell that demonstrates outstanding performance, maintaining stability for over 2500 h at 1 A cm<sup>-2</sup> 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.