Thiamine Pyrophosphate-Enhanced NiFe Layered Double Hydroxide for Robust and Durable Seawater Oxidation Electrocatalysis

Seawater electrolysis has garnered considerable interest as an environmentally sustainable method for hydrogen production. However, the abundance of chloride ions in seawater poses a challenge to electrocatalyst stability, underscoring the need for catalysts with exceptional durability and efficiency to facilitate effective seawater oxidation. In this study, thiamine pyrophosphate (TPP) was intercalated into a NiFe layered double hydroxide on nickel foam (NF/NiFe LDH), creating an advanced seawater oxidation electrocatalyst (NF/NiFe LDH@TPP) that effectively resists chloride-induced corrosion. Remarkably, the TPP-intercalated catalyst demonstrates superior kinetics and selectivity for the oxygen evolution reaction, reaching a current density of 1 A cm-2 with an overpotential as low as 385 mV, while sustaining stable seawater oxidation performance for over 500 h.