Towards hydrogen production using a breathable electrode structure to directly separate gases in the water splitting reaction

Orawan Winther-Jensen, Khwanrat Chatjaroenporn, Bjorn Winther Jensen, Douglas R. MacFarlane

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A novel electrode design to directly separate the gases and improve the efficiency of the water splitting reaction is described. In this work, platinum was used as a model catalyst, deposited on porous membranes with different pore size and shape. The O 2 evolution rate was monitored at the gaseous side of these breathable electrodes. We show that the hydrophobic Goretex ® membrane electrodes provide a highly efficient removal of the gases, breathing out 92% of expected O 2 during water splitting, and thereby also largely avoiding the well known migration of oxygen to the cathode in the absence of a separator in the cell. The breathable structure is also shown to operate as a hydrogen electrode. The ability to separate the two gases, without the need for a separator, decreases gas cross-over and thereby enhances the coloumbic efficiency. Merging this approach with catalysts and photocatalysts of a variety of types e.g. non-precious metal and metal oxides will allow fabrication of cost efficient and straightforward water splitting devices.

Original languageEnglish
Pages (from-to)8185-8189
Number of pages5
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number10
DOIs
Publication statusPublished - 2012 May
Externally publishedYes

Fingerprint

water splitting
hydrogen production
Hydrogen production
Electrodes
electrodes
separators
Separators
Gases
gases
Water
membranes
Membranes
catalysts
Catalysts
Photocatalysts
breathing
Metals
Merging
Pore size
metal oxides

Keywords

  • Breathable electrodes
  • Gas separation
  • Hydrogen production
  • Water oxidation
  • Water splitting

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this

Towards hydrogen production using a breathable electrode structure to directly separate gases in the water splitting reaction. / Winther-Jensen, Orawan; Chatjaroenporn, Khwanrat; Winther Jensen, Bjorn; MacFarlane, Douglas R.

In: International Journal of Hydrogen Energy, Vol. 37, No. 10, 05.2012, p. 8185-8189.

Research output: Contribution to journalArticle

Winther-Jensen, Orawan ; Chatjaroenporn, Khwanrat ; Winther Jensen, Bjorn ; MacFarlane, Douglas R. / Towards hydrogen production using a breathable electrode structure to directly separate gases in the water splitting reaction. In: International Journal of Hydrogen Energy. 2012 ; Vol. 37, No. 10. pp. 8185-8189.
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