Also called hydrotalcite-like compounds, anionic clays, NiFe-LDH
Positively charged hydroxide sheets with swappable anions in between – the chemical opposite of ordinary clays. They are cheap, easy to make in water, and among the best catalysts known for the oxygen-evolution half of water splitting in alkaline electrolysers, which is the slow step in making green hydrogen.
Readiness runs lab → prototype → pilot → deployed.
Short notes for specialists. Choose a lens in the header and yours comes first.
The catalytically active phase under operation is an oxyhydroxide, not the as-made hydroxide, so models must include potential-dependent deprotonation and surface reconstruction. DFT+U with the computational hydrogen electrode gives adsorption-energy trends but not kinetics; interlayer water and anions affect the electronic structure and should be included.
Track interlayer anion exchange through the XRD basal spacing; characterise nickel and iron oxidation states by XPS or, better, operando X-ray absorption. Electrolyte purity matters enormously – trace iron in KOH changes nickel hydroxide activity dramatically – so report the electrolyte source and any purification.
Cheap, abundant and made in water, so scale is not the problem; electrode adhesion and long-term stability at high current density are. The established hydrotalcite markets show that the chemistry itself scales.
The newest items tagged LDHs, from the news feed updated 5 Oct 2026.
Cobalt–manganese layered double hydroxide (CoMn-LDH) electrochromic films were successfully fabricated on fluorine-doped tin oxide (FTO) substrates via a facile one-step electrodeposition strategy. The nanosheet architecture of the CoMn-LDH films was...
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