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Designed Conducting Polymer Composites That Facilitate Long-Lived, Light-Driven Oxygen and Hydrogen Evolution from Water in a Photoelectrochemical Concentration Cell (PECC)

Journal Article


Abstract


  • Light-driven water-splitting to generate hydrogen and oxygen from water is typically

    carried out in an electrochemical cell with an external voltage greater than 1.23 V applied between

    the electrodes. In this work, we examined the use of a concentration/chemical bias as a means of

    facilitating water-splitting under light illumination without the need for such an externally applied

    voltage. Such a concentration bias was created by employing a pH differential in the liquid electrolytes

    within the O2-generating anode half-cell and the H2-generating cathode half-cell. A novel, stretchable,

    highly ion-conductive polyacrylamide CsCl hydrogel was developed to connect the two half-cells.

    The key feature of the cell was the half-cell electrodes, which comprised thin-film conducting polymer

    composites that were previously designed to maximize light-driven catalysis at moderate pH. Upon

    being connected with the hydrogel in the presence of light irradiation (0.25 sun intensity on each

    electrode), the half-cells spontaneously produced hydrogen and oxygen from water, without the need

    for an externally applied voltage bias greater than 1.23 V. The cell operated reliably and efficiently

    for 14 h of continuous testing. These results demonstrate the fundamental feasibility of light-driven

    water-splitting in a photoelectrochemical concentration cell when employing electrodes that operate

    efficiently at moderate pH, even with low levels of light illumination. The designed conducting

    polymer composites proved ideal in that regard.

UOW Authors


  •   Alsultan, Mohammed (external author)
  •   Zainulabdeen, Khalid (external author)
  •   Wagner, Pawel
  •   Swiegers, Gerhard
  •   Warren, Holly (external author)

Publication Date


  • 2019

Citation


  • Alsultan, M., Zainulabdeen, K., Wagner, P. W., Swiegers, G. F. & Warren, H. (2019). Designed Conducting Polymer Composites That Facilitate Long-Lived, Light-Driven Oxygen and Hydrogen Evolution from Water in a Photoelectrochemical Concentration Cell (PECC). Journal of composites science, 3 (4), 108-1-108-10.

Start Page


  • 108-1

End Page


  • 108-10

Volume


  • 3

Issue


  • 4

Place Of Publication


  • Switzerland

Abstract


  • Light-driven water-splitting to generate hydrogen and oxygen from water is typically

    carried out in an electrochemical cell with an external voltage greater than 1.23 V applied between

    the electrodes. In this work, we examined the use of a concentration/chemical bias as a means of

    facilitating water-splitting under light illumination without the need for such an externally applied

    voltage. Such a concentration bias was created by employing a pH differential in the liquid electrolytes

    within the O2-generating anode half-cell and the H2-generating cathode half-cell. A novel, stretchable,

    highly ion-conductive polyacrylamide CsCl hydrogel was developed to connect the two half-cells.

    The key feature of the cell was the half-cell electrodes, which comprised thin-film conducting polymer

    composites that were previously designed to maximize light-driven catalysis at moderate pH. Upon

    being connected with the hydrogel in the presence of light irradiation (0.25 sun intensity on each

    electrode), the half-cells spontaneously produced hydrogen and oxygen from water, without the need

    for an externally applied voltage bias greater than 1.23 V. The cell operated reliably and efficiently

    for 14 h of continuous testing. These results demonstrate the fundamental feasibility of light-driven

    water-splitting in a photoelectrochemical concentration cell when employing electrodes that operate

    efficiently at moderate pH, even with low levels of light illumination. The designed conducting

    polymer composites proved ideal in that regard.

UOW Authors


  •   Alsultan, Mohammed (external author)
  •   Zainulabdeen, Khalid (external author)
  •   Wagner, Pawel
  •   Swiegers, Gerhard
  •   Warren, Holly (external author)

Publication Date


  • 2019

Citation


  • Alsultan, M., Zainulabdeen, K., Wagner, P. W., Swiegers, G. F. & Warren, H. (2019). Designed Conducting Polymer Composites That Facilitate Long-Lived, Light-Driven Oxygen and Hydrogen Evolution from Water in a Photoelectrochemical Concentration Cell (PECC). Journal of composites science, 3 (4), 108-1-108-10.

Start Page


  • 108-1

End Page


  • 108-10

Volume


  • 3

Issue


  • 4

Place Of Publication


  • Switzerland