High-Performance Pyrochlore-Type Yttrium Ruthenate Electrocatalyst for Oxygen Evolution Reaction in Acidic Media
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No Canadian affiliation. An affiliation-only frame — the usual design — would never have seen this work. It is one of the works that make the case for inverting the frame.
Machine scores (provisional)
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- Teacher spread
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- Validation status
score_only:v0-immature-baseline· verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it
Abstract
High Resolution Image Download MS PowerPoint Slide Development of acid-stable electrocatalysts with low overpotential for oxygen evolution reaction (OER) is a major challenge to produce hydrogen directly from water. We report in this paper a pyrochlore yttrium ruthenate (Y 2 Ru 2 O 7−δ ) electrocatalyst that has significantly enhanced performance toward OER in acid media over the best-known catalysts, with an onset overpotential of 190 mV and high stability in 0.1 M perchloric acid solution. X-ray absorption near-edge structure (XANES) indicates Y 2 Ru 2 O 7−δ electrocatalyst had a low valence state that favors the high OER activity. Density functional theory (DFT) calculation shows this pyrochlore has lower band center energy for the overlap between Ru 4d and O 2p orbitals and is therefore more stable Ru–O bond than RuO 2, highlighting the effect of yttrium on the enhancement in stability. The Y 2 Ru 2 O 7−δ pyrochlore is also free of expensive iridium metal and thus is a cost-effective candidate for practical applications.
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The record
- Venue
- Journal of the American Chemical Society
- Topic
- Electrocatalysts for Energy Conversion
- Field
- Energy
- Canadian institutions
- —
- Funders
- University of Illinois at Urbana-ChampaignCanadian Light SourceU.S. Department of Energy
- Keywords
- OverpotentialChemistryElectrocatalystPyrochloreOxygen evolutionYttriumInorganic chemistryWater splittingXANESCatalysisElectrochemistryOxidePhysical chemistryElectrode
- Has abstract in OpenAlex
- yes