Chemical bias of electrochemical and photoelectrochemical water splitting using a hydrogel separator

Amir Kaplan, Eli Korin, Shuli Halevy, Armand Bettelheim

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Resorcinol-formaldehyde hydrogels are shown to be adequate separators in electrochemical and photoelectrochemical water splitting cells. Combined with concentrated buffer electrolytes, they allow the maintenance of relatively stable pH gradients between basic anolytes and acidic catholytes. The water splitting potential at a current density of 3.0 mA/cm2 applied between two Pt electrodes and a pH bias of 8.1 units retained a value of 2.7 V for several hours. Using iron foam/hematite as photoanode and Pt as cathode, the water splitting photocurrents at an applied potential of 1.23 V reached values of 0.40 and 0.06 mA/cm2 in the presence and absence, respectively, of this chemical bias.

Original languageEnglish
Pages (from-to)97-99
Number of pages3
JournalElectrochemistry Communications
Volume60
DOIs
StatePublished - 2 Nov 2015

Keywords

  • Chemical bias
  • Electrolysis
  • Hydrogel separator
  • Photoelectrolysis
  • Water splitting

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