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- W3204800095 abstract "Multi-field coupling, especially photo-assisted electrocatalysis, has recently been studied to further improve the oxygen evolution reaction (OER). In this study, an n-type cubic In2 O3 semiconductor is employed for the first time to load IrOx species (Ir-In2 O3 mass ratio: 17.6 %). Consequently, the IrOx @In2 O3 heterojunction, which exhibits outstanding OER performance promoted by weak-light irradiation, is formed. Notably, IrOx (approximately 1.7 nm in size) and In2 O3 are observed to crystallize independently during heterogeneous nucleation with no Ir atoms doped in the In2 O3 lattice. This avoids Ir loss and ensures the full exposure of all Ir-based sites. The IrOx @In2 O3 heterojunction exhibits enhanced electrocatalytic water oxidation with overpotential values of 190 and 231 mV at current densities of 10 and 50 mA cm-2 , surpassing all IrOx -based catalyst results reported to date. Nano-sized IrOx on the surface, irradiated by the weak-light beam of LED-365 (1.8 mW cm-2 ), can be fully activated as an OER site. Moreover, the overpotential is further reduced to 176 and 210 mV to deliver the corresponding current. This work is anticipated to aid in the design of more efficient multi-field coupling OER systems." @default.
- W3204800095 created "2021-10-11" @default.
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- W3204800095 date "2021-11-16" @default.
- W3204800095 modified "2023-10-17" @default.
- W3204800095 title "IrO<sub><i>x</i></sub>@In<sub>2</sub>O<sub>3</sub> Heterojunction from Individually Crystallized Oxides for Weak‐Light‐Promoted Electrocatalytic Water Oxidation" @default.
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- W3204800095 doi "https://doi.org/10.1002/anie.202112042" @default.
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