Fabrication of iridium oxide nanoparticles supported on activated carbon powder by flashlight irradiation for oxygen evolutions

Abstract

In this study, iridium oxide (IrO2) nanoparticles supported on activated carbon were fabricated for oxygen evolutions using a flashlight irradiation process at room temperature under ambient conditions within a few milliseconds. The fabricated IrO₂nanoparticles were decorated on the activated carbon surface and enlarged to 3.51 nm as average diameter from an initial value of 1.54 nm. The fabricated IrO₂nanoparticles were characterized using high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) analysis, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and linear sweep voltammetry (LSV) for the oxygen evolution reaction.|본 연구에서는 백색광 조사 공정을 통해 상온 대기압 하에서 수 밀리 초 이내에 산소발생용 산화이리듐(IrO₂) 나노입자 촉매를 제조하였다. 활성탄 위에 담지된 이리듐(Ir) 나노입자는 공정 후 IrO2로 산화되며 이 때, 그 직경이 1.54 나노미터(nm)에서 3.51 nm로 증가하였다. 또한, 고분해능-전자투과현미경(high-resolution transmission electron microscopy, HRTEM)과 X-선 회절(X-ray diffraction, XRD) 분석법, X-선 광전자분광법(X-ray photoelectron spectroscopy, XPS), 라만분광법(Raman spectroscopy), 선형주사전위법(linear sweep voltammetry, LSV)의 물리화학 분석을 통해 IrO₂의 생성을 확인하였으며 그것의 어플리케이션을 위한 전기화학적 성능을 확인해보았다.; In this study, iridium oxide (IrO2) nanoparticles supported on activated carbon were fabricated for oxygen evolutions using a flashlight irradiation process at room temperature under ambient conditions within a few milliseconds. The fabricated IrO₂nanoparticles were decorated on the activated carbon surface and enlarged to 3.51 nm as average diameter from an initial value of 1.54 nm. The fabricated IrO₂nanoparticles were characterized using high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD) analysis, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and linear sweep voltammetry (LSV) for the oxygen evolution reaction.