음이온 교환막 수전해 적용을 위한 고균일 고내구 코발트 산화물 전극의 제조 및 공정 조건 최적화
Optimization of fabrication and process conditions for highly uniform and durable cobalt oxide electrodes for anion exchange membrane water electrolysis
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
Anion exchange membrane electrolysis is considered a promising next-generation hydrogen production technology that can produce low-cost, clean hydrogen. However, anion exchange membrane electrolysis technology is in its early stages of development and requires intensive research on electrodes, which are a key component of the catalyst-system interface. In this study, we optimized the pressure conditions of the hot-pressing process to manufacture cobalt oxide electrodes for the development of a high uniformity and high adhesion electrode production process for the oxygen evolution reaction. As the pressure increased, the reduction of pores within the electrode and increased densification of catalytic particles led to the formation of a uniform electrode surface. The cobalt oxide electrode optimized for pressure conditions exhibited improved catalytic activity and durability. The optimized electrode was used as the anode in an AEMWE single cell, exhibiting a current density of 1.53 A cm-2 at a cell voltage of 1.85 V. In a durability test conducted for 100 h at a constant current density of 500 mA cm-2, it demonstrated excellent durability with a low degradation rate of 15.9 mV kh-1, maintaining 99% of its initial performance.
Abstract
Anion exchange membrane electrolysis is considered a promising next-generation hydrogen production technology that can produce low-cost, clean hydrogen. However, anion exchange membrane electrolysis technology is in its early stages of development and requires intensive research on electrodes, which are a key component of the catalyst-system interface. In this study, we optimized the pressure conditions of the hot-pressing process to manufacture cobalt oxide electrodes for the development of a high uniformity and high adhesion electrode production process for the oxygen evolution reaction. As the pressure increased, the reduction of pores within the electrode and increased densification of catalytic particles led to the formation of a uniform electrode surface. The cobalt oxide electrode optimized for pressure conditions exhibited improved catalytic activity and durability. The optimized electrode was used as the anode in an AEMWE single cell, exhibiting a current density of 1.53 A cm-2 at a cell voltage of 1.85 V. In a durability test conducted for 100 h at a constant current density of 500 mA cm-2, it demonstrated excellent durability with a low degradation rate of 15.9 mV kh-1, maintaining 99% of its initial performance.
참고문헌 (19)
- E. Haghi, "Investigating the effect of renewable energy incentives and hydrogen storage on advantages of stakeholders in a microgrid", Energy Policy, 113, pp.206~222 (2018)
- Y. Zhou, "Green hydrogen: A promising way to the carbon-free society", Chinese Journal of Chemical Engineering, pp.2~13 (2022)
- M. A. Khan, "Recent progresses in electrocatalysts for water electrolysis", Electrochemical Energy Reviews, 1, pp.483~530 (2018)
- G. Cipriani, "Perspective on hydrogen energy carrier and its automotive applications", International Journal of Hydrogen Energy, 39, pp.8482~8494 (2014)
- Y. Zhou, "Green hydrogen : A promising way to the carbon-free society", Chinese Journal of Chemical Engineering, 43, pp.2~13 (2022)
- J. Zhang, "Support and interface effects in water-splitting electrocatalysts", Advanced Materials, 31, pp.1808167~ (2019)
- C. Li, "Recent advances in noble metal (Pt, Ru, and Ir)-based electrocatalysts for efficient hydrogen evolution reaction", American Chemical Society Omega, 5, pp.31~40 (2020)
- H. Sun, "Recent advances in doped ruthenium oxides as highefficiency electrocatalysts for the oxygen evolution reaction", Journal of Materials Chemistry A, 9, pp.15506~15521 (2021)
- P. Fortin, "High-performance alkaline water electrolysis using AemionTM anion exchange membranes", Journal of Power Sources, 451, pp.227814~ (2020)
- Y. S. Park, "Commercial anion exchange membrane water electrolyzer stack through non-precious metal electrocatalysts", Applied Catalysis B : Environmental, 292, pp.120170~ (2021)
- P. M. Bodhankar, "Recent advances in highly active nanostructured NiFe LDH catalyst for electrochemical water splitting", Journal of Materials Chemistry A, 9, pp.3180~3208 (2021)
- F. Wang, "Recent advances in transition-metal dichalcogenide based nanomaterials for water splitting", Nanoscale, 7, pp.19764~19788 (2015)
- G. Yuan, "The effect of P vacancies on the activity of cobalt phosphide nanorods as oxygen evolution electrocatalyst in alkali", Applied Catalysis B : Environmental, 284, pp.119693~ (2021)
- M. Wang, "Recent advances in transition-metal-sulfidebased bifunctional electrocatalysts for overall water splitting", Journal of Materials Chemistry A, 9, pp.5320~5363 (2021)
- T. Y. Wei, "A cost-effective supercapacitor material of ultrahigh specific capacitances : spinel nickel cobaltite aerogels from an epoxide-driven sol–gel process", Advanced materials, 22, pp.347~351 (2010)
- Y. S. Park, "Commercial anion exchange membrane water electrolyzer stack through non-precious metal electrocatalysts", Applied Catalysis B : Environmental, 292, pp.120170~ (2021)
- F. Tang, "Strong surface hydrophilicity in Co-based electrocatalysts for water oxidation", ACS Applied Materials & Interfaces, 9, pp.26867~26873 (2017)
- W. Xu, "CuxCo3-xO4(0 ≤ x < 1)nanoparticles for oxygen evolution in high performance alkaline exchange membrane water electrolysers", Journal of Materials Chemistry, 21, pp.12344~ (2011)
- R. A. Krivina, "Anode Catalysts in AnionExchange-Membrane Electrolysis without Supporting Electrolyte:Conductivity, Dynamics, and Ionomer Degradation", Advanced Materials, 34, pp.2203033~ (2022)