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제120회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Sonochemical Preparation and characterization of Amorphous earth-abundant metal oxide Nanoparticles as Electrocatalysts for Oxygen Evolution Reaction

2017년 8월 2일 11시 18분 07초
ELEC.P-449 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 20일 (금요일) 13:00~14:30
저자 및
Ah-Hyeon Park, Hyun-Uk Park, jong un jung, Young-Uk Kwon*
Department of Chemistry, Sungkyunkwan University, Korea
In the for electrical energy storage system, the metal-air battery with high theoretical specific energy is attractive technology that overcoming the limit of Li-ion battery such as low driving range and energy density. However, due to the limitations of high operating voltage and low cycle life, it is necessary to use oxygen evolution reaction (OER) catalyst to increase the energy efficiency. IrOx and RuOx are commercial OER catalyst but its element scarcity and high cost hindered the commercialization. Therefore, earth-abundant metal oxide compound is emerging as an alternative. Herein, we present the sonochemical synthesis that synthesizes a non-precious metal compound with binary and ternary metal system and their electrochemical performance in alkaline electrolyte solutions. We prepared a binary metal compound with 1:1 ratio using 1st transition metal precursor and measured OER electrocatalytic performance and durability through the electrochemical interaction between metal. Among them, Sample that includes Fe, Co, and Ni showed excellent catalytic activity and Ni-Fe oxide compound showed superior OER catalytic activity and durability. In case of controlling the metal composition regarding the Ni-Fe and Fe-Co system showing the best catalytic activity, while Fe-Co system showed similar activity without reference to metal ratio, Ni-Fe system exhibited Volcano-type trend according to the metal ratio and Ni70Fe30 sample showed the best catalytic activity. Based on our results, we demonstrated that the electronic structural change by metal-metal interaction affected to electrochemical performance and expected to improve its electrochemical catalytic performance.