|
1
|
Sun C, Hou Y, Lüdi N, Hu H, de Jesús Gálvez-Vázquez M, Liechti M, Kong Y, Liu M, Erni R, Rudnev AV, Broekmann P. Improving the lifetime of hybrid CoPc@MWCNT catalysts for selective electrochemical CO2-to-CO conversion. J Catal 2022. [DOI: 10.1016/j.jcat.2022.02.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
|
3
|
Park YJ, Lee J, Park YS, Yang J, Jang MJ, Jeong J, Choe S, Lee JW, Kwon JD, Choi SM. Electrodeposition of High-Surface-Area IrO 2 Films on Ti Felt as an Efficient Catalyst for the Oxygen Evolution Reaction. Front Chem 2020; 8:593272. [PMID: 33195098 PMCID: PMC7645052 DOI: 10.3389/fchem.2020.593272] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 09/18/2020] [Indexed: 01/08/2023] Open
Abstract
Under acidic conditions, IrO2 exhibits high catalytic activity with respect to the oxygen evolution reaction (OER). However, the practical application of Ir-based catalysts is significantly limited owing to their high cost in addition to the scarcity of the metal. Therefore, it is necessary to improve the efficiency of the utilization of such catalysts. In this study, IrO2-coated Ti felt (IrO2/Ti) electrodes were prepared as high-efficiency catalysts for the OER under acidic conditions. By controlling the surface roughness of the Ti substrate via wet etching, the optimum Ti substrate surface area for application in the IrO2/Ti electrode was determined. Additionally, the IrO2 film that was electrodeposited on the 30 min etched Ti felt had a large surface area and a uniform morphology. Furthermore, there were no micro-cracks and the electrode obtained (IrO2/Ti-30) exhibited superior catalytic performance with respect to the OER, with a mass activity of 362.3 A gIr-1 at a potential of 2.0 V (vs. RHE) despite the low Ir loading (0.2 mg cm−2). Therefore, this proposed strategy for the development of IrO2/Ti electrodes with substrate surface control via wet etching has potential for application in the improvement of the efficiency of catalyst utilization with respect to the OER.
Collapse
Affiliation(s)
- Yu Jin Park
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea.,Department of Materials Science and Engineering, Pusan National University, Busan, South Korea
| | - Jooyoung Lee
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| | - Yoo Sei Park
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea.,Department of Materials Science and Engineering, Pusan National University, Busan, South Korea
| | - Juchan Yang
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| | - Myeong Je Jang
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| | - Jaehoon Jeong
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| | - Seunghoe Choe
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| | - Jung Woo Lee
- Department of Materials Science and Engineering, Pusan National University, Busan, South Korea
| | - Jung-Dae Kwon
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| | - Sung Mook Choi
- Surface Technology Division, Materials Center for Energy Department, Korea Institute of Materials Science, Changwon, South Korea
| |
Collapse
|