A sodium-ion-conducted asymmetric electrolyzer to lower the operation voltage for direct seawater electrolysis.

ABSTRACT: Hydrogen produced from neutral seawater electrolysis faces many challenges including high energy consumption, the corrosion/side reactions caused by Cl^-, and the blockage of active sites by Ca²⁺/Mg²⁺ precipitates. Herein, we design a pH-asymmetric electrolyzer with a Na⁺ exchange membrane for direct seawater electrolysis, which can simultaneously prevent Cl^- corrosion and Ca²⁺/Mg²⁺ precipitation and harvest the chemical potentials between the different electrolytes to reduce the required voltage. In-situ Raman spectroscopy and density functional theory calculations reveal that water dissociation can be promoted with a catalyst based on atomically dispersed Pt anchored to Ni-Fe-P nanowires with a reduced energy bar

SUBMITTER: Shi H 

PROVIDER: S-EPMC10319863 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature