Antimony doped tin oxides and their composites with tin pyrophosphates as catalyst supports for oxygen evolution reaction in proton exchange membrane water electrolysis

Junyuan Xu, Qingfeng Li, Martin Kalmar Hansen, Erik Christensen, Antonio Luis Tomás García, Gaoyang Liu, Xindong Wang, Niels Bjerrum

Research output: Contribution to journalConference articleResearchpeer-review

Abstract

Proton exchange membrane water electrolysers operating at typically 80 °C or at further elevated temperatures suffer from insufficient catalyst activity and durability. In this work, antimony doped tin oxide nanoparticles were synthesized and further doped with an inorganic proton conducting phase based on tin pyrophosphates as the catalyst support. The materials showed an overall conductivity of 0.57 S cm−1 at 130 °C under the water vapor atmosphere with a contribution of the proton conduction. Using this composite support, iridium oxide nanoparticle catalysts were prepared and characterized in sulfuric and phosphoric acid electrolytes, showing much enhanced catalytic activity. Electrolyzer tests were conducted at both 80 °C with an Aquivion™ membrane and at 130 °C with a phosphoric acid doped Aquivion™ membrane. Significant improvement in the anodic kinetics was achieved on the composite supported catalysts at 130 °C although the electrolyzer cells showed higher ohmic resistance primarily from the membrane and catalyst layer. A durability test of electrolyzer cells was carried out at 130 °C under a current density of 400 mA cm−2 in a period of up to 760 h, showing rather good stability of the system.
Original languageEnglish
JournalInternational Journal of Hydrogen Energy
Volume37
Issue number24
Pages (from-to)18629-18640
ISSN0360-3199
DOIs
Publication statusPublished - 2012
Event2011 International Workshop on Molten Carbonates and Related Topics - Ecole Nationale Superieure de Chimie de Paris, Paris, France
Duration: 21 Mar 201122 Mar 2011

Conference

Conference2011 International Workshop on Molten Carbonates and Related Topics
LocationEcole Nationale Superieure de Chimie de Paris
CountryFrance
CityParis
Period21/03/201122/03/2011

Keywords

  • Proton exchange membrane water electrolysis
  • Oxygen evolution reaction
  • Iridium oxide
  • Antimony doped tin oxide
  • Tin pyrophosphate
  • Composite support

Fingerprint Dive into the research topics of 'Antimony doped tin oxides and their composites with tin pyrophosphates as catalyst supports for oxygen evolution reaction in proton exchange membrane water electrolysis'. Together they form a unique fingerprint.

Cite this