skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A highly active and stable IrO x/SrIrO 3 catalyst for the oxygen evolution reaction

Abstract

Oxygen electrochemistry plays a key role in renewable energy technologies such as fuel cells and electrolyzers, but the slow kinetics of the oxygen evolution reaction (OER) limit the performance and commercialization of such devices. Here we report an iridium oxide/strontium iridium oxide (IrO x/SrIrO 3) catalyst formed during electrochemical testing by strontium leaching from surface layers of thin films of SrIrO 3. This catalyst has demonstrated specific activity at 10 milliamps per square centimeter of oxide catalyst (OER current normalized to catalyst surface area), with only 270 to 290 millivolts of overpotential for 30 hours of continuous testing in acidic electrolyte. Here, density functional theory calculations suggest the formation of highly active surface layers during strontium leaching with IrO 3 or anatase IrO 2 motifs. The IrO x/SrIrO 3 catalyst outperforms known IrO x and ruthenium oxide (RuO x) systems, the only other OER catalysts that have reasonable activity in acidic electrolyte.

Authors:
 [1];  [2];  [3];  [4];  [4];  [4];  [4];  [4];  [3];  [2];  [2]
  1. Stanford Univ., Stanford, CA (United States)
  2. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States); Stanford Univ., Stanford, CA (United States)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1349300
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Science
Additional Journal Information:
Journal Volume: 353; Journal Issue: 6303; Journal ID: ISSN 0036-8075
Publisher:
AAAS
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Seitz, Linsey C., Dickens, Colin F., Nishio, Kazunori, Hikita, Yasuyuki, Montoya, Joseph, Doyle, Andrew, Kirk, Charlotte, Vojvodic, Aleksandra, Hwang, Harold Y., Norskov, Jens K., and Jaramillo, Thomas F. A highly active and stable IrOx/SrIrO3 catalyst for the oxygen evolution reaction. United States: N. p., 2016. Web. doi:10.1126/science.aaf5050.
Seitz, Linsey C., Dickens, Colin F., Nishio, Kazunori, Hikita, Yasuyuki, Montoya, Joseph, Doyle, Andrew, Kirk, Charlotte, Vojvodic, Aleksandra, Hwang, Harold Y., Norskov, Jens K., & Jaramillo, Thomas F. A highly active and stable IrOx/SrIrO3 catalyst for the oxygen evolution reaction. United States. doi:10.1126/science.aaf5050.
Seitz, Linsey C., Dickens, Colin F., Nishio, Kazunori, Hikita, Yasuyuki, Montoya, Joseph, Doyle, Andrew, Kirk, Charlotte, Vojvodic, Aleksandra, Hwang, Harold Y., Norskov, Jens K., and Jaramillo, Thomas F. Fri . "A highly active and stable IrOx/SrIrO3 catalyst for the oxygen evolution reaction". United States. doi:10.1126/science.aaf5050. https://www.osti.gov/servlets/purl/1349300.
@article{osti_1349300,
title = {A highly active and stable IrOx/SrIrO3 catalyst for the oxygen evolution reaction},
author = {Seitz, Linsey C. and Dickens, Colin F. and Nishio, Kazunori and Hikita, Yasuyuki and Montoya, Joseph and Doyle, Andrew and Kirk, Charlotte and Vojvodic, Aleksandra and Hwang, Harold Y. and Norskov, Jens K. and Jaramillo, Thomas F.},
abstractNote = {Oxygen electrochemistry plays a key role in renewable energy technologies such as fuel cells and electrolyzers, but the slow kinetics of the oxygen evolution reaction (OER) limit the performance and commercialization of such devices. Here we report an iridium oxide/strontium iridium oxide (IrOx/SrIrO3) catalyst formed during electrochemical testing by strontium leaching from surface layers of thin films of SrIrO3. This catalyst has demonstrated specific activity at 10 milliamps per square centimeter of oxide catalyst (OER current normalized to catalyst surface area), with only 270 to 290 millivolts of overpotential for 30 hours of continuous testing in acidic electrolyte. Here, density functional theory calculations suggest the formation of highly active surface layers during strontium leaching with IrO3 or anatase IrO2 motifs. The IrOx/SrIrO3 catalyst outperforms known IrOx and ruthenium oxide (RuOx) systems, the only other OER catalysts that have reasonable activity in acidic electrolyte.},
doi = {10.1126/science.aaf5050},
journal = {Science},
number = 6303,
volume = 353,
place = {United States},
year = {Fri Sep 02 00:00:00 EDT 2016},
month = {Fri Sep 02 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 121 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

A comprehensive review on PEM water electrolysis
journal, April 2013

  • Carmo, Marcelo; Fritz, David L.; Mergel, Jürgen
  • International Journal of Hydrogen Energy, Vol. 38, Issue 12, p. 4901-4934
  • DOI: 10.1016/j.ijhydene.2013.01.151

Atomic Control of the SrTiO3 Crystal Surface
journal, December 1994