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One-dimensional amorphous porous iridium–ruthenium oxide for efficient acidic oxygen evolution reaction.
- Source :
- Journal of Materials Chemistry A; 12/14/2023, Vol. 11 Issue 46, p25268-25274, 7p
- Publication Year :
- 2023
-
Abstract
- The acidic oxygen evolution reaction (OER) is a four-electron transfer process with slow kinetics and a high overpotential, which is greatly hindering the development of water electrolysis. But pure iridium-based catalysts or pure ruthenium-based catalysts find it difficult to achieve the required performance with both high activity and high stability. Here, we have successfully prepared one-dimensional amorphous porous iridium–ruthenium bimetallic oxide nanobelts, which exhibit a low overpotential of 204 mV at 10 mA cm<superscript>−2</superscript> and high-quality activity of 119 A g<subscript>Ir+Ru</subscript><superscript>−1</superscript> at 1.45 V<subscript>RHE</subscript> in acidic OER. More importantly, as an anode, amorphous porous iridium–ruthenium oxide nanobelts remain stable over 350 h of operation at 1.8 V in a proton exchange membrane electrolyzer (PEM). The interaction of iridium and ruthenium in the amorphous structure successfully compensates for the defects of the single components, providing a basis for the design of acidic OER catalysts. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 11
- Issue :
- 46
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 173894901
- Full Text :
- https://doi.org/10.1039/d3ta04597h