121st General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code ELEC.P-581
Subject Synthesis and Characterization of Electrospun Ruthenium-Cobalt Oxide Nanofibers and Their Catalytic Activity for Oxygen Evolution Reaction
Authors Areum Yu, Chongmok Lee, Myung Hwa Kim, Youngmi Lee*
Department of Chemistry and Nano Science, Ewha Womans University, Korea
Abstract The electrolytic splitting of water is important component of promising sustainable energy systems to generate hydrogen as fuel of the future. However, the oxygen evolution reaction (OER), half-reaction of the electrolytic water splitting reaction, is kinetically sluggish reaction. Also, RuO2 and IrO2 known as efficient electrocatalysts of OER are scarce and expensive. Thus, development of efficient and economic OER electrocatalysts is important to overcome the kinetic barriers of water splitting. In this presentation, various one dimensional RuCo mixed oxide nanofibers are prepared by simple electrospinning and subsequent calcination process. The ratios of Ru to Co in RuCo oxide nanofibers were adjusted by controlling the composition of electrospinning solutions. The morphologies and compositions of the prepared RuCo nanofibers are characterized by field-emission scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and X-ray diffraction. Electrochemical activities of RuCo oxide nanofibers for OER are carried out with rotating disk electrode (RDE) voltammetry in 1 M H2SO4 aqueous solution. Although cheap and abundant Co was mixed with Ru, the activities of RuCo oxide nanofibers were similar with activity of RuO2 (onset potential and Tafel slope). This research was supported by the National Research Foundation of Korea (NRF) grant funded by the Ministry of Science, ICT and Future Planning (NRF-2017R1A2A2A14001137).
E-mail dkfma_5569@nate.com