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Korean Journal of Metals and Materials > Volume 58(1); 2020 > Article
Korean Journal of Metals and Materials 2020;58(1): 49-58. doi: https://doi.org/10.3365/KJMM.2020.58.1.49
음이온 교환막 수전해에 사용되는 Cu0.72Co2.28O4 산소 발생 촉매의 합성 및 특성 분석
박성민1,2, 장명제1.4, 박유세1,2, 이주영1, 정재엽1,2, 정재훈1, 최민관1,2, 노유성1, 서민호3, 김형주4,5, 양주찬1, 김양도2, 최승목1
Synthesis and Characterization of the Cu0.72Co2.28O4 Catalyst for Oxygen Evolution Reaction in an Anion Exchange Membrane Water Electrolyzer
Sung Min Park1,2, Myeong Je Jang1.4, Yoo Sei Park1,2, Jooyoung Lee1, Jae-yeop Jeong1,2, Jaehoon Jung1, Min-Kwan Choi1,2, Yu-Seong Noh1, Min-Ho Seo3, Hyung Ju Kim4,5, Juchan Yang1, Yang Do Kim2, Sung Mook Choi1
1Materials Center for Energy Department, Surface Technology Division, Korea Institute of Materials Science, Changwon 51508, Republic of Korea
2Department of Materials Science and Engineering, Pusan National University, Busan 46241, Republic of Korea
3Buan Fuel Cell Center, New and Renewable Energy Institute, Korea Institute of Energy Research (KIER), Buan 56332, Republic of Korea
4Advanced Materials Engineering, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea
5Carbon Resources Institute, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
Correspondence  Juchan Yang ,Tel: +82-55-280-3504, Email: juchana83@kims.re.kr
Yang Do Kim ,Tel: +82-51-510-3967, Email: yangdo@pusan.ac.kr
Sung Mook Choi ,Tel: +82-55-280-3504, Email: akyzaky@kims.re.kr
Received: 4 October 2019;  Accepted: 15 November 2019.  Published online: 12 December 2019.
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.
Keywords: water electrolysis, oxygen evolution reaction(OER), copper cobalt oxide, precursors, coprecipitation method, anion exchange membrane water electrolysis(AEMWE)
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