Boosting the OER activity of amorphous IrOx in acidic medium by tuning its electron structure using lanthanum salt nanosheets
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
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Detail(s)
Original language | English |
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Pages (from-to) | 2619-2625 |
Journal / Publication | New Journal of Chemistry |
Volume | 47 |
Issue number | 5 |
Online published | 30 Dec 2022 |
Publication status | Published - 7 Feb 2023 |
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Abstract
Promoting the activity of Ir-based nanomaterials for oxygen evolution reaction (OER) in acid media without losing their durability is crucial for reducing overpotentials in energy conversion, such as electrochemical water splitting. Here, a nanocomposite composed of a-IrOx and lanthanum salt (LaCO3OH) was constructed to further improve its OER activity by tuning the electronic structure of a-IrOx, because a-IrOx is a well-known critical material as the active layer of Ir-based anodic catalysts. The interaction between Ir and La via O atoms as a bridge in the catalyst IrOx/LaCO3OH, verified by X-ray absorption near edge structure spectroscopy, tunes the electronic structure of a-IrOx and thus obviously enhances its activity for the OER in acid media, compared with commercially available IrO2 as well as most of the reported Ir-based OER electrocatalysts. The overpotential of IrOx/LaCO3OH at a current density of 10 mA cm-2 is 255 mV with a Tafel slope of 55 mV dec-1. This work reveals that the strong electronic interaction between Ir- and La-based materials can efficiently improve activity and reduce energy consumption, as well as enlarging the family of acidic OER electrocatalysts.
Research Area(s)
- EFFICIENT OXYGEN EVOLUTION, CATALYSTS, ELECTROCATALYSTS
Citation Format(s)
Boosting the OER activity of amorphous IrOx in acidic medium by tuning its electron structure using lanthanum salt nanosheets. / Wang, Xuefeng; Jang, Haeseong; Li, Zijian et al.
In: New Journal of Chemistry, Vol. 47, No. 5, 07.02.2023, p. 2619-2625.
In: New Journal of Chemistry, Vol. 47, No. 5, 07.02.2023, p. 2619-2625.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review