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Cho, Jaephil
Nano Energy Storage Materials Lab (NESM)
Research Interests
  • Li-ion battery, metal-air battery, redox-flow battery, flexible battery .


IrO2/LiLa2IrO6 as a robust electrocatalyst for the oxygen evolution reaction in acidic media

DC Field Value Language Liu, HuiHui ko Jang, Haeseong ko Wang, Yu ko Kim, Min Gyu ko Li, Haisen ko Qin, Qing ko Liu, Xien ko Cho, Jaephil ko 2022-02-10T23:16:14Z - 2022-02-03 ko 2022-02 ko
dc.identifier.citation JOURNAL OF MATERIALS CHEMISTRY A, v.10, no.7, pp.3393 - 3399 ko
dc.identifier.issn 2050-7488 ko
dc.identifier.uri -
dc.description.abstract Recently reported non-noble metal-iridium mixed oxides not only exhibit excellent activity for the oxygen evolution reaction in acidic media, but also reduce the cost. However, most of them fail to overcome the poor stability of amorphous iridium oxide formed on the surface after leaching of the non-noble metal. Herein, we describe a LiLa2IrO6 electrocatalyst with a thin IrO2 shell (IrO2/LiLa2IrO6) that achieves a win-win situation for both activity and stability under harsh acidic conditions. The synthesized IrO2/LiLa2IrO6 catalyst exhibits outstanding activity for the OER in 0.1 M HClO4 electrolyte, and needs a low overpotential of 278 mV to deliver the benchmark of 10 mA cm(-2), superior to commercially available IrO2 and most recently reported catalysts. More significantly, IrO2/LiLa2IrO6 shows enhanced electrochemical stability with only 160 mV increase in potential after testing over 13 h, in contrast to commercial IrO2 that almost lost its activity toward the OER in 7 h. This demonstrates that the high performance for catalyzing the OER is ascribed to the in situ formed IrOx highly active layer by surface reconstruction as well as the strong interaction between IrOx and bulk LiLa2IrO6. ko
dc.language 영어 ko
dc.publisher ROYAL SOC CHEMISTRY ko
dc.title IrO2/LiLa2IrO6 as a robust electrocatalyst for the oxygen evolution reaction in acidic media ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-85125018086 ko
dc.identifier.wosid 000744899200001 ko
dc.type.rims ART ko
dc.identifier.doi 10.1039/d1ta09849g ko
dc.identifier.url ko
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