High-Performance Pyrochlore-Type Yttrium Ruthenate Electrocatalyst for Oxygen Evolution Reaction in Acidic Media
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TLDR
A pyrochlore yttrium ruthenate (Y2Ru2O7-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.Abstract:
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 (Y2Ru2O7−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 Y2Ru2O7−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 RuO2, highlighting the effect of yttrium on the enhancement in stability. The Y2Ru2O7−δ pyrochlore is also free of expensive iridium metal and thus is a cost-effective candidate for practical applications.read more
Citations
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Recent Advances on Water-Splitting Electrocatalysis Mediated by Noble-Metal-Based Nanostructured Materials
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Recent advances and prospective in ruthenium-based materials for electrochemical water splitting
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Chromium-ruthenium oxide solid solution electrocatalyst for highly efficient oxygen evolution reaction in acidic media
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TL;DR: An Iridium-free and low ruthenium-content oxide material derived from metal-organic framework with remarkable oxygen evolution reaction performance in acidic condition is reported, highlighting the influence of chromium promoter on the enhancement in both activity and stability.
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Dynamic oxygen adsorption on single-atomic Ruthenium catalyst with high performance for acidic oxygen evolution reaction.
Linlin Cao,Qiquan Luo,Jiajia Chen,Lan Wang,Yue Lin,Huijuan Wang,Xiaokang Liu,Xinyi Shen,Wei Zhang,Wei Liu,Zeming Qi,Zheng Jiang,Jinlong Yang,Tao Yao +13 more
TL;DR: An atomically dispersed Ru1-N4 site anchored on nitrogen-carbon support (Ru-N-C) is reported as an efficient and durable electrocatalyst for acidic OER.
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