Asset Details
Do you wish to reserve the book?
Hexafluorophosphate additive enables durable seawater oxidation at ampere-level current density
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Hexafluorophosphate additive enables durable seawater oxidation at ampere-level current density
Do you wish to request the book?
Hexafluorophosphate additive enables durable seawater oxidation at ampere-level current density
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Hexafluorophosphate additive enables durable seawater oxidation at ampere-level current density
2025
Overview
Direct seawater electrolysis at ampere-level current densities, powered by coastal/offshore renewables, is an attractive avenue for sustainable hydrogen production but is undermined by chloride-induced anode degradation. Here we demonstrate the use of hexafluorophosphate (PF₆⁻) as an electrolyte additive to overcome this limitation, achieving prolonged operation for over 5,000 hours at 1 A cm
−2
and 2300 hours at 2 A cm
−2
using NiFe layered double hydroxide (LDH) as anode. Together with the experimental findings, PF₆⁻ can intercalate into LDH interlayers and adsorb onto the electrode surface under an applied electric field, blocking Cl⁻ and stabilizing Fe to prevent segregation. The constant-potential molecular dynamics simulations further reveal the accumulation of high surface concentrations of PF
6
−
on the electrode surface that can effectively exclude Cl
−
, mitigating corrosion. Our work showcases synchronous interlayer and surface engineering by single non-oxygen anion species to enable Cl
−
rejection and marks a crucial step forward in seawater electrolysis.
Seawater electrolysis at ampere-level current densities demands durable anodes for practical hydrogen production. Here, the authors report that a single non-oxygen anion enables dual modulation of surface and interlayer structures, stabilizing layered double hydroxide anodes for over 5,000 hours.
