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- W3166434564 abstract "Abstract A grand challenge for proton exchange membrane electrolyzers is the rational design of oxygen evolution reaction electrocatalysts to balance activity and stability. Here, we report a support-stabilized catalyst, the activated ~200 nm-depth IrW nanochannel that achieves the current density of 2 A cm −2 at an overpotential of only ~497 mV and maintains ultrastable gas evolution at 100 mA cm −2 at least 800 h with a negligible degradation rate of ~4 μV h −1 . Structure analyses combined with theoretical calculations indicate that the IrW support alters the charge distribution of surface (IrO 2 ) n clusters and effectively confines the cluster size within 4 (n≤4). Such support-stabilizing effect prevents the surface Ir from agglomeration and retains a thin layer of electrocatalytically active IrO 2 clusters on surface, realizing a win-win strategy for ultrahigh OER activity and stability. This work would open up an opportunity for engineering suitable catalysts for robust proton exchange membrane-based electrolyzers." @default.
- W3166434564 created "2021-06-22" @default.
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- W3166434564 date "2021-06-10" @default.
- W3166434564 modified "2023-10-09" @default.
- W3166434564 title "IrW nanochannel support enabling ultrastable electrocatalytic oxygen evolution at 2 A cm−2 in acidic media" @default.
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- W3166434564 doi "https://doi.org/10.1038/s41467-021-23907-1" @default.
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