화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.85, 87-93, May, 2020
DOI10.1016/j.jiec.2020.01.024  Export Citation
Optimization of carbon-supported Ir.Ru alloys for polymer electrolyte fuel cell anodes under cell reversal
Tae-Yang Kim1, Seung Woo Lee2, and Chanho Pak1, 2, †
  • 1Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
  • 2Graduate Program of Energy Technology, School of Integrated Technology, Institute of Integrated Technology, Gwangju Institute of Science and Technology, Gwangju 61005, Republic of Korea
E-mail:
Cell reversal (CR) caused by fuel starvation can significantly affect the performance of the polymer electrolyte membrane fuel cells (PEMFCs). To mitigate this issue, carbon-supported Ir.Ru alloys are considered as one of the most promising PEMFC anode materials. Herein, carbon-supported Ir.Ru alloys were prepared via a simple wet impregnation method followed by solid-state reduction at temperatures of 200, 250, and 300 °C under H2 gas flow and 300, 600, and 900 °C under N2 gas flow. The size, stoichiometric composition, and structural information of the prepared IrRu4/C were investigated using transmission electron microscopy, scanning electron microscopy.energy dispersive X-ray spectroscopy, X-ray diffraction, and X-ray absorption fine structure, the results of which exhibited different electrochemical properties in terms of hydrogen oxidation reaction and oxygen evolution reaction (OER). The electrochemical results showed the enhanced OER activities of IrRu4/C formed at 200 °C under H2. Furthermore, IrRu4/C can be formed under N2 with a change in the reduction temperature. This study provides fundamental properties for optimizing synthetic parameters of Ir.Ru-based catalysts to alleviate the degradation of conventional carbon-supported Pt owing to CR issues.
Keywords:Polymer electrolyte membrane fuel cell;iridium.ruthenium alloy;Wet impregnation;Oxygen evolution reaction;Hydrogen oxidation reaction
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