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Title: Polymer Entrapment Flash Pyrolysis for the Preparation of Nanoscale Iridium-Free Oxygen Evolution Electrocatalysts

Abstract

Abstract This paper describes the use of a new polymer entrapment flash pyrolysis (PEFP) method for making nanoscale yttrium ruthenate (Y 2 Ru 2 O 7‐δ ) electrocatalysts. This approach effectively reduced the synthesis temperature of phase‐pure pyrochlore catalysts from 1000 °C to 550 °C, and greatly suppressed the sintering of catalyst particles. The supported nanocrystalline Y 2 Ru 2 O 7‐δ catalysts showed enhanced activity towards oxygen evolution reaction (OER) in acidic electrolyte and were stable at 1.50 V for the comparative study (>20 h) under the current density of 10 mA/cm 2 geo in chronopotentiometry testing. This is equivalent to an overpotential value of 270 mV, about half of that of the reference IrO 2 catalyst. X‐ray absorption spectroscopy (XAS) and transmission electron microscopy (TEM) analysis showed that the high‐surface‐area Y 2 Ru 2 O 7‐δ catalyst had an oxygen‐deficient structure. This study provides a route to the synthesis of fine ceramic (or oxide)‐based electrocatalysts for making high‐performing electrocatalysts.

Authors:
 [1];  [1];  [1];  [2]; ORCiD logo [1]
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  1. Univ. of Illinois at Urbana-Champaign, IL (United States)
  2. Argonne National Lab. (ANL), Lemont, IL (United States)
Publication Date:
Research Org.:
Argonne National Laboratory (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1774242
Alternate Identifier(s):
OSTI ID: 1615032
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
ChemNanoMat
Additional Journal Information:
Journal Volume: 6; Journal Issue: 6; Journal ID: ISSN 2199-692X
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; pyrochlore; yttrium ruthenate; nanocrystalline; oxygen evolution electrocatalyst; polymer entrapment

Citation Formats

Shih, Pei‐Chieh, Zhang, Cheng, Raheja, Harshit, Sun, Cheng‐Jun, and Yang, Hong. Polymer Entrapment Flash Pyrolysis for the Preparation of Nanoscale Iridium-Free Oxygen Evolution Electrocatalysts. United States: N. p., 2020. Web. doi:10.1002/cnma.202000124.
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Shih, Pei‐Chieh, Zhang, Cheng, Raheja, Harshit, Sun, Cheng‐Jun, & Yang, Hong. Polymer Entrapment Flash Pyrolysis for the Preparation of Nanoscale Iridium-Free Oxygen Evolution Electrocatalysts. United States. https://doi.org/10.1002/cnma.202000124
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Shih, Pei‐Chieh, Zhang, Cheng, Raheja, Harshit, Sun, Cheng‐Jun, and Yang, Hong. Mon . "Polymer Entrapment Flash Pyrolysis for the Preparation of Nanoscale Iridium-Free Oxygen Evolution Electrocatalysts". United States. https://doi.org/10.1002/cnma.202000124. https://www.osti.gov/servlets/purl/1774242.
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@article{osti_1774242,
title = {Polymer Entrapment Flash Pyrolysis for the Preparation of Nanoscale Iridium-Free Oxygen Evolution Electrocatalysts},
author = {Shih, Pei‐Chieh and Zhang, Cheng and Raheja, Harshit and Sun, Cheng‐Jun and Yang, Hong},
abstractNote = {Abstract This paper describes the use of a new polymer entrapment flash pyrolysis (PEFP) method for making nanoscale yttrium ruthenate (Y 2 Ru 2 O 7‐δ ) electrocatalysts. This approach effectively reduced the synthesis temperature of phase‐pure pyrochlore catalysts from 1000 °C to 550 °C, and greatly suppressed the sintering of catalyst particles. The supported nanocrystalline Y 2 Ru 2 O 7‐δ catalysts showed enhanced activity towards oxygen evolution reaction (OER) in acidic electrolyte and were stable at 1.50 V for the comparative study (>20 h) under the current density of 10 mA/cm 2 geo in chronopotentiometry testing. This is equivalent to an overpotential value of 270 mV, about half of that of the reference IrO 2 catalyst. X‐ray absorption spectroscopy (XAS) and transmission electron microscopy (TEM) analysis showed that the high‐surface‐area Y 2 Ru 2 O 7‐δ catalyst had an oxygen‐deficient structure. This study provides a route to the synthesis of fine ceramic (or oxide)‐based electrocatalysts for making high‐performing electrocatalysts.},
doi = {10.1002/cnma.202000124},
journal = {ChemNanoMat},
number = 6,
volume = 6,
place = {United States},
year = {Mon Mar 23 00:00:00 EDT 2020},
month = {Mon Mar 23 00:00:00 EDT 2020}
}
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https://doi.org/10.1002/cnma.202000124
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