4/1/2024 0 Comments Sea water densityEnergy-saving hydrogen production by chlorine-free hybrid seawater splitting coupling hydrazine degradation. Electrolysis of low-grade and saline surface water. Photoelectrochemical cells for solar hydrogen production: current state of promising photoelectrodes, methods to improve their properties, and outlook. Direct electrolytic splitting of seawater: opportunities and challenges. Our work is a substantial step forwards in producing green hydrogen and achieving a sustainable energy future.ĭresp, S., Dionigi, F., Klingenhof, M. A photovoltaic-electrolysis device with the electrocatalyst as both an oxygen and a hydrogen evolution catalyst delivers a record solar-to-hydrogen efficiency of 18.1% for overall seawater splitting, along with good stability over 200 h under a high working current over 440 mA. Introduction of carbonate ions into its interlayers and surface anchoring of graphene quantum dots block unfavourable adsorption of chloride ions and contribute to increased resistance of the electrocatalyst to chloride ion corrosion. Here we report an earth-abundant layered double hydroxide electrocatalyst that sustains stable electrolysis of seawater over 2,800 h under an ultra-high current density of ∼1.25 A cm −2. However, because of the complex ion environment, direct electrolytic splitting of seawater faces major challenges, notably chlorine evolution, corrosion of electrodes and other side reactions. A promising pathway to mass production of hydrogen is electrolysis of seawater-an unlimited water source-using renewable energy. Hydrogen has long been seen as a key energy vector for a carbon-neutral and sustainable future.
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