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Photoelectrochemical Performance of Hematite Nanoparticles Synthesized by a DC Thermal Plasma Process

DC 열플라즈마를 이용하여 제조된 산화철 나노입자의 광 전기화학적 물분해 효율 증가연구

  • Lee, Chulho (Department of Chemistry and Chemical Engineering, Inha University) ;
  • Lee, Dongeun (Department of Chemistry and Chemical Engineering, Inha University) ;
  • Kim, Sunkyu (Department of Chemistry and Chemical Engineering, Inha University) ;
  • Yoo, Hyeonseok (Department of Chemistry and Chemical Engineering, Inha University) ;
  • Choi, Jinsub (Department of Chemistry and Chemical Engineering, Inha University)
  • 이철호 (인하대학교 화학.화학공학 융합학과) ;
  • 이동은 (인하대학교 화학.화학공학 융합학과) ;
  • 김선규 (인하대학교 화학.화학공학 융합학과) ;
  • 유현석 (인하대학교 화학.화학공학 융합학과) ;
  • 최진섭 (인하대학교 화학.화학공학 융합학과)
  • Received : 2015.03.05
  • Accepted : 2015.04.08
  • Published : 2015.06.10

Abstract

In this research, hematite nanoparticles were synthesized by DC thermal plasma process to increase the overall surface area. The effect of binders on hematite electrodes was investigated by changing the type and composition of binders when preparing electrodes. Nitrogen gas was also added to the DC thermal plasma process in order to dope the hematite with N for enhancing photoelectrochemical properties of hematite nanoparticles. The efficiency of water splitting reaction was measured by linear sweep voltammetry (LSV) under solar simulator. In LSV measurements, the onset potential and maximum current density at a fixed voltage were measured. The durability of electrodes was checked by repeating LSV measurements. CMC (carboxymethyl cellulose) binder with 50 : 1 composition exhibits the highest current density of $12mA/cm^2$ and CMC binder with 20 : 1 composition, showing the initial current density of $3mA/cm^2$, endures 20 times of repetitive LSV measurements. Effects of nitrogen doping on hematite nanoparticles were proven to be insignificant.

Keywords

Hematite;Water splitting;Photoelectrochemistry;Binder;Oxygen evolution reaction

Acknowledgement

Grant : 분자촉매 설계 및 응용연구 사업단

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