Journal of the Korean Crystal Growth and Crystal Technology (한국결정성장학회지)

The Korea Association of Crystal Growth (한국결정성장학회)
권호 표지
DOI QR코드

DOI QR Code

Enhancement of oxygen evolution reaction of NiCo LDH nanocrystals using Mo doping

Mo 도핑을 이용한 NiCo LDH 나노결정의 산소발생반응 향상

  • Kyoungwon Cho (Center for Research Facilities, Korea National University of Transportation) ;
  • Jeong Ho Ryu (Department of Materials Science and Engineering, Korea National University of Transportation)
  • 조경원 (한국교통대학교 공동실험실습관) ;
  • 유정호 (한국교통대학교 반도체신소재공학과)
  • Received : 2024.06.04
  • Accepted : 2024.06.17
  • Published : 2024.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

To improve the efficiency of water splitting systems for hydrogen production, the high overvoltages of electrochemical reactions caused by catalysts in the oxygen evolution reaction (OER, Oxygen Evolution Reaction) must be reduced. Among them, LDH (Layered Double Hydroxide) compounds containing transition metal such as Ni, are attracting attention as catalyst materials that can replace precious metals such as platinum that are currently used. In this study, nickel foam, an inexpensive metallic porous material, was used as a support, and NiCo LDH (Layered Double Hydroxide) nanocrystals were synthesized through a hydrothermal synthesis process. In addition, changes in the shape, crystal structure, and water decomposition characteristics of the Mo-doped NiCo LDH nanocrystal samples synthesized by doping Mo to improve OER properties were observed.

수소 생산을 위한 물 분해 시스템의 효율성을 높이려면 산소 발생 반응(OER, Oxygen Evolution Reaction)에서 촉매로 인해 발생하는 전기화학 반응의 높은 과전압을 감소시켜야 한다. 그중 전이금속을 포함하는 LDH(Layered Double Hydroxide)와 같은 화합물은 현재 사용되고 있는 백금 등의 귀금속을 대체할 수 있는 촉매 소재로 주목받고 있다. 본 연구에서는 저렴한 금속 다공성 물질인 니켈 폼을 지지체로 사용하였고, 수열합성 공정을 통해 NiCo LDH 나노결정을 합성하였다. 또한, OER 특성을 향상시키기 위해 Mo를 도핑하여 합성한 Mo 도핑된 NiCo LDH 나노결정 시료의 형태, 결정구조, 물분해 특성의 변화를 관찰하였다.

Keywords

Acknowledgement

이 성과는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(RS-2024-00342443).

References

  1. Y. Jung, T.L. Doan, T.N. Nguyen and T. Kim, "Research and development trends in seawater electrolysis systems and catalyst", Appl. Chem. Eng. 34(6) (2023) 567.
  2. B.L. Salvi and K.A. Subramanian, "Sustainable development of road transportation sector using hydrogen energy system", Renew. Sustain. Energy Rev. 51 (2015) 1132.
  3. M.A. Pellow, C.J.M. Emmott, C.J. Barnhart and S.M. Benson, "Hydrogen or batteries for grid storage? A net energy analysis", Energy Environ. Sci. 8 (2015) 1938.
  4. J. Gorre, F. Ruoss, H. Karjunen, J. Schaffert and T. Tynjala, "Cost benefits of optimizing hydrogen storage and methanation capacities for Power-to-Gas plants in dynamic operation", Appl. Energy 257 (2020) 113967.
  5. M. El-Shafie, "Hydrogen production by water electrolysis tech-nologies: A review", Results Eng. 20 (2023) 101426.
  6. G. Liu, "Oxygen evolution reaction electrocatalysts for seawater splitting: A review", J. Electroanal. Chem. 923 (2022) 116802
  7. Y. Zhou and H.J. Fan, "Progress and challenge of amorphous catalysts for electrochemical water splitting", ACS Mater. Lett. 3 (2021) 136.
  8. S.-C. Ke, R. Chen, G.-H. Chen and X.-L. Ma, "Mini review on electrocatalyst design for seawater splitting: recent progress and perspectives", Energy Fuels 35 (2021) 12948.
  9. T. Kou, S. Wang, J.S. Hauser, M. Chen, S.R.J. Oliver, Y. Ye, J. Guo and Y. Li, "Ni foam-suported Fe-doped β-Ni(OH)2 nanosheets show ultralow overpotential for oxygen evolution reaction", ACS Energy Lett. 4 (2019) 622.
  10. A. Hameed, M. Batool, Z. Liu, M.A. Nadeem and R. Jin, "Layered double hydroxide-derived nanomaterials for efficient electrocatalytic water splitting: Recent progress and future perspective", ACS Energy Lett. 7 (2022) 3311.
  11. J-I. Lee, D. Ko, S. Mhin and J.H. Ryu, "Heat-treatment effects on oxygen evolution reaction of nickel-conbalt layered couble hydroxide", J. Korean Cryst. Growth Cryst. Technol. 31(3) (2021) 143.
  12. A. Hameed, M. Batool, Z. Liu, M.A. Nadeem and R. Jin, "Layered double hydroxide-derived nanomaterials for efficient electrocatalytic water splitting: Recent progress and future perspective", ACS Energy Lett. 7 (2022) 3311.
  13. K. Lee, S. Kang, J.H. Ryu, H. Jeon, M. Kim, Y.-K. Kim, T. Song, H. Han, S. Mhin and K.M. Kim, "Surface-modified carbon nanotubes with ultrathin Co3O4 layer for enhanced oxygen evolution reaction", ACS Appl. Mater. Interfaces 15 (2023) 58377.
  14. J. Guo, K. Wang, H. Zhang and H. Zhang, "Enhanced electrocatalytic activity of Mo-doped NiFe layered double hydroxide nanosheet arrays for the hydrogen evolution reaction", ACS Appl. Nano Mater. 6 (2023) 379.
  15. L. Wei, M. Du, R. Zhao, F. Lv, L. Li, L. Zhang and D. Zhou, "High-valence Mo doping for highly promoted water oxidation of NiFe (oxy)hydroxide", J. Mater. Chem. A 10 (2022) 23790.
  16. B. You and Y. Sun, "Innovative strategies for Electro-catalytic water splitting", ACS. Chem. Res. 51 (2018) 1571.