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제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Development of Ru-Pd chain nanowires for bifunctional oxygen electrocatalysis in alkaline solution

등록일
2017년 8월 23일 16시 42분 44초
접수번호
1221
발표코드
ELEC.P-464 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 20일 (금요일) 13:00~14:30
발표형식
포스터
발표분야
Electrochemistry
저자 및
공동저자
Sunguk Noh, JUN HO SHIM*
Department of Chemistry, Daegu University, Korea
The development of active, robust, and bifunctional catalysts for both the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is important and challenging. The key technology in the regenerative fuel cell, which consists of two separated subsystems: a fuel cell and a water electrolyzer, is the fabrication of bifunctional oxygen catalysts which promote both ORR and OER. Recently, it has been reported that the promising bifunctional oxygen catalysts are limited to several noble metals, such as Pt, Ir, Ru, IrO2 and RuO2. In the previous work, Ru and its oxides are unstable in the operating conditions although they display a high catalytic activity to OER. This presentation reports the facile synthesis and characterization of carbon-supported Ru-Pd chain nanowires (Ru-Pd/C). A series of Ru-Pd/C with various Ru/Pd weight percentage ratios were prepared by the spontaneous deposition of a Ru cluster on a Pd chain nanowires core using different Ru precursor concentration. The compositional/structural features were characterized by scanning electron microscopy equipped with an energy dispersive X-ray spectroscopy, high-resolution transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The electrocatalytic activity of the Ru-Pd/C for both ORR and OER in alkaline media was investigated by rotating disk electrode, and cyclic voltammetry. Indeed, the prepared Ru-Pd chain nanowires with a very low content of Ru exhibited significant electrocatalytic activity towards both ORR and OER. This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2016R1D1A1B03930895).

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