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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. 2016. "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 = 2016,
month = 9
}

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Cited by: 23works
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  • Rational design and controlled synthesis of hybrid structures comprising multiple components with distinctive functionalities are an intriguing and challenging approach to materials development for important energy applications like electrocatalytic hydrogen production, where there is a great need for cost effective, active and durable catalyst materials to replace the precious platinum. Here we report a structure design and sequential synthesis of a highly active and stable hydrogen evolution electrocatalyst material based on pyrite-structured cobalt phosphosulfide nanoparticles grown on carbon nanotubes. The three synthetic steps in turn render electrical conductivity, catalytic activity and stability to the material. The hybrid material exhibits superiormore » activity for hydrogen evolution, achieving current densities of 10 mA cm –2 and 100 mA cm –2 at overpotentials of 48 mV and 109 mV, respectively. Lastly, phosphorus substitution is crucial for the chemical stability and catalytic durability of the material, the molecular origins of which are uncovered by X-ray absorption spectroscopy and computational simulation.« less
  • In this study, rational design and controlled synthesis of hybrid structures comprising multiple components with distinctive functionalities are an intriguing and challenging approach to materials development for important energy applications like electrocatalytic hydrogen production, where there is a great need for cost effective, active and durable catalyst materials to replace the precious platinum. Here we report a structure design and sequential synthesis of a highly active and stable hydrogen evolution electrocatalyst material based on pyrite-structured cobalt phosphosulfide nanoparticles grown on carbon nanotubes. The three synthetic steps in turn render electrical conductivity, catalytic activity and stability to the material. The hybridmore » material exhibits superior activity for hydrogen evolution, achieving current densities of 10 and 100 mA cm –2 at overpotentials of 48 and 109 mV, respectively. Phosphorus substitution is crucial for the chemical stability and catalytic durability of the material, the molecular origins of which are uncovered by X-ray absorption spectroscopy and computational simulation.« less