Single-Phase Pyrochlore Y2Ir2O7 Electrocatalyst on the Activity of Oxygen Evolution Reaction

Pei Chieh Shih, Jaemin Kim, Cheng Jun Sun, Hong Yang

Research output: Contribution to journalArticlepeer-review

Abstract

Single-phase pyrochlore-type Y2Ir2O7 electrocatalyst was made through the sol-gel synthesis. This catalyst has high activity and stability toward oxygen evolution reaction (OER) in acid. Chronopotentiometry analysis shows no major changes in overpotential for more than 24 h measurement at 10 mA/cm2geo. Transmission electron microscopy shows no formation of a new shell layer after the OER tests. X-ray absorption spectroscopy (XAS) was used to examine the single-electron filling in the e″ orbital of Ir 5d states, which could contribute to the improved OER activity.

Original languageEnglish (US)
Pages (from-to)3992-3998
Number of pages7
JournalACS Applied Energy Materials
Volume1
Issue number8
DOIs
StatePublished - Aug 27 2018

Keywords

  • YIrO
  • electrocatalysis
  • oxygen evolution reaction
  • pyrochlore
  • water splitting

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Materials Chemistry
  • Electrical and Electronic Engineering

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