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Vol.58, No.1, 49 ~ 59, 2020
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| Title |
| Synthesis and Characterization of the Cu0.72Co2.28O4 Catalyst for Oxygen Evolution Reaction in an Anion Exchange Membrane Water Electrolyzer |
| 박성민 Sung Min Park , 장명제 Myeong Je Jang , 박유세 Yoo Sei Park , 정재엽 Jooyoung Lee , 정재훈 Jae-yeop Jeong , 이주영 Jaehoon Jung , 최민관 Min-kwan Choi , 노유성 Yu-seong Noh , 서민호 Min-ho Seo , 김형주 Hyung Ju Kim , 양주찬 Juchan Yang , 김양도 Yang Do Kim , 최승목 Sung Mook Choi |
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| Abstract |
| In this study, we investigated the morphological, crystal structural, electronic structural, and electrocatalytic properties of the inverse spinel structured copper cobalt oxide (Cu0.72Co2.28O4) catalysts. The materials were prepared by coprecipitation using various copper and cobalt precursors, and subsequent oxidation treatment. Electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and Brunauer Emmett Teller (BET) analyses were employed to characterize the Cu0.72Co2.28O4 catalysts. The Cu0.72Co2.28O4 catalyst, synthesized with acetate based precursors, exhibited higher activity for the oxygen evolution reaction than commercial precious IrO2 catalyst. This performance was attributed to its high surface area, sheet morphology and ratio of Co3+. The Cu0.72Co2.28O4 catalyst also showed excellent stability with a performance of 99% after 300 hours. The Cu0.72Co2.28O4 catalyst anode electrode was coupled with a Pt/C cathode electrode to construct an anion exchange membrane water electrolysis (AEMWE) cell. Our AEMWE cell achieved a current density of 644 mA/cm2 and an energy efficiency of 85% at a cell voltage of 1.8 V in 1M KOH.
(Received October 4, 2019; Accepted November 15, 2019) |
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| Key Words |
| water electrolysis, oxygen evolution reaction(OER), copper cobalt oxide, precursors, coprecipitation method, anion exchange membrane water electrolysis(AEMWE) |
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