음이온 교환막 수전해에 사용되는 Cu0.72Co2.28O4 산소 발생 촉매의 합성 및 특성 분석

• Published in: 대한금속·재료학회지, 58(1) pp. 49 - 58
• Main Authors: 박성민, 장명제, 박유세, 정재엽, 정재훈, 이주영, 최민관, 노유성, 서민호, 김형주, 양주찬, 김양도, 최승목
• Format: Journal Article
• Language: Korean
• Published: 대한금속·재료학회 01.01.2020
• Subjects: 재료공학
• ISSN: 1738-8228; 2288-8241

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. KCI Citation Count: 7