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

박유세; 정창욱; 김치호; 구태우; 석창규; 권일영; 김양도; Yoo Sei Park; Changwook Jung; Chiho Kim; Taewoo Koo; Changgyu Seok; Ilyeong Kwon; Yangdo Kim

Korean Journal of Materials Research, Vol.29, No.2, 92-96, February, 2019

DOI10.3740/MRSK.2019.29.2.92 Export Citation

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

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

박유세, 정창욱, 김치호, 구태우, 석창규, 권일영, 김양도 ^†

부산대학교 공과대학 재료공학과

Yoo Sei Park, Changwook Jung, Chiho Kim, Taewoo Koo, Changgyu Seok, Ilyeong Kwon, and Yangdo Kim^†

School of Materials Science and Engineering, Pusan National University, Busan 46241, Republic of Korea

E-mail:

초록

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 °C to 400 °C 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 °C 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.

Keywords:CuxCo3-xO4;sol-gel;oxygen evolution reaction(OER)

[References]

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[2] Xu W, Scott K, J. Mater. Chem., 21, 12344 (2011)

[3] Carmo M, Fritz DL, Mergel J, Stolten D, Int. J. Hydrog. Energy, 38, 4091 (2013)

[4] Bocca C, Barbucci A, Delucchi M, Cerisola G, Int. J. Hydrog. Energy, 24(1), 21 (1999)

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[9] Nikolov I, Darkaoui R, Zhecheva E, Stoyanova R, Dimitrov N, Vitanov T, J. Electroanal. Chem., 429(1-2), 157 (1997)

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[13] Barbi B, Santos JP, Serrini P, Gibson PN, Horrillo MC, Manes L, Sens. Actuators B-Chem., 25, 559 (1995)

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