| 학회 | 한국재료학회 |
| 학술대회 | 2018년 가을 (11/07 ~ 11/09, 여수 디오션리조트) |
| 권호 | 24권 2호 |
| 발표분야 | E. 환경/센서 재료 분과 |
| 제목 | One-pot microwave irradiation synthesis of iridium nanoparticles supported on Sb-doped SnO2 in ionic liquids for water electrolysis |
| 초록 | Water electrolysis have much attention as a method of hydrogen production since it does not generate pollutant such as carbon dioxide. Water electrolysis can produce hydrogen by applying voltage to anode and cathode. In the water electrolysis, overpotential voltage is generically induced by various reasons leads to higher voltage than 1.23 V of standard water splitting voltage. To reduce the overpotential voltage, metal nanoparticles (NPs) catalysts are used as catalysts. Iridium (Ir) is one of the widely-used metal catalysts as an anode for water electrolysis due to its resistance against harsh corrosive environment caused by hydrogen proton. Furthermore, to enhance catalytic activity of Ir catalyst supports materials are frequently used since those can help the dispersion and reduce the agglomeration of the catalysts. In general, although carbon is most well-known as a support material, it can be easily degraded under acidic environment due to its corrosiveness. But, antimony-doped tin oxide (ATO) is very suitable support material due to its relatively better stability in acidic environment. In this work, we try to maximize the catalytic activity by minimizing Iridium size and combining with support material to enhance dispersion. Ir NPs catalyst supported on ATO was synthesized by ionic liquid and microwave by one-pot method. The morphology is characterized by transmission electron microscopy (TEM), the average size of Iridium is 2.51 nm and well dispersed around ATO. Also, catalytic activity of Ir/ATO was investigated by Rotation disk electrode (RDE) test in 0.5M H2SO4 acidic solution. At linear sweep voltammetry (LSV) for oxygen evolution reaction (OER), fabricated Ir/ATO showed better performance for Ir loading 0.1mg/cm2 with overpotential 273 mV @ 10 mA/cm2 compared with 304 mV of commercial Ir black nanopowder and at the stability test Ir/ATO showed better endurance than Iridium/carbon at 50 mA/cm2. |
| 저자 | 송현용1, 이원욱2, 김태원1, 이인환2 |
| 소속 | 1고려대, 2한국생산기술(연) |
| 키워드 | <P>ionic liquids; water electrolysis; microwave; oxygen evolution reaction; Iridium nanoparticle</P> |
