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ISSN : 1225-0562(Print)
ISSN : 2287-7258(Online)
Korean Journal of Materials Research Vol.29 No.2 pp.92-96

Electrochemical Analysis of CuxCo3-xO4 Catalyst for Oxygen Evolution Reaction Prepared by Sol-Gel Method

Yoo Sei Park,Changwook Jung,Chiho Kim,Taewoo Koo,Changgyu Seok,Ilyeong Kwon,Yangdo Kim
School of Materials Science and Engineering, Pusan National University, Busan 46241, Republic of Korea
Corresponding author E-Mail : (Y. Kim, Pusan Nat’l Univ.)


Transition metal oxide is widely used as a water electrolysis catalyst to substitute for a noble metal catalyst such as IrO2 and RuO2. In this study, the sol-gel method is used to synthesize the CuxCo3-xO4 catalyst for the oxygen evolution reaction (OER),. The CuxCo3-xO4 is synthesized at various calcination temperatures from 250 oC to 400 oC for 4 h. The CuxCo3-xO4 synthesized at 300 oC has a perfect spinel structure without residues of the precursor and secondary phases, such as CuO. The particle size of CuxCo3-xO4 increases with an increase in calcination temperature. Amongst all the samples studied, CuxCo3-xO4, which is synthesized at 300?, has the highest activity for the OER. Its onset potential for the OER is 370 mV and the overpotential at 10 mA/cm2 is 438 mV. The tafel slope of CuxCo3-xO4 synthesized at 300 oC has a low value of 58 mV/dec. These results are mainly explained by the increase in the available active surface area of the CuxCo3-xO4 catalyst.

Sol-Gel법을 이용한 CuxCo3-xO4 산소 발생 촉매의 합성 및 전기화학 특성 분석

부산대학교 공과대학 재료공학과