Kim, Jun Kwon, Taehyun Yu, Saerom Chun, So Yeon Oh, Aram Kim, Jong Min Baik, Hionsuck Ham, Hyung Chul Kim, Jin Young Kwak, Kyungwon Lee, Kwangyeol 2024-01-19T17:02:26Z 2024-01-19T17:02:26Z 2021-09-02 2020-08 2040-3364 https://pubs.kist.re.kr/handle/201004/118339 Developing highly efficient Ir-based electrocatalysts for the oxygen evolution reaction (OER) has been an important agenda in spearheading the water splitting technology. In this study, the synthesis of IrCo nanocacti on Co(x)S(y)nanocages (ICS NCs) is demonstrated by utilizing CoO@Co(x)S(y)nanoparticles as reactive nanotemplates. In addition to the high catalytic activities with a low overpotential of 281 mV at 10 mA cm(-2)and an outstanding mass activity of 1285 mA mg(Ir)(-1)at 1.53 V, the ICS NCs endure a prolonged OER test for over 100 h, greatly outperforming other previously reported Ir-based electrocatalysts. This work suggests that the unique hetero-nanostructure of IrCo/Co(x)S(y)inducesin situS doping during electrochemical oxidation and the beneficial effect of S doping on the enhanced stability of ICS NCs for the OER. English ROYAL SOC CHEMISTRY IrCo nanocacti on Co(x)S(y)nanocages as a highly efficient and robust electrocatalyst for the oxygen evolution reaction in acidic media Article 10.1039/d0nr04622a 1 NANOSCALE, v.12, no.32, pp.17074 - 17082 NANOSCALE 12 32 17074 17082 N scie scopus 000561429100040 2-s2.0-85089787108 Chemistry, Multidisciplinary Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article IRIDIUM NANODENDRITES STABILITY OXIDATION XANES FILMS