Fe 도핑된 β-Ni(OH)₂ 마이크로결정 합성과 산소발생반응 특성
Synthesis of Fe-doped β-Ni(OH)₂ microcrystals and their oxygen evolution reactions
0
조회
0
다운로드
1
인용
0
참고문헌
키워드
초록
수소에너지 생산을 위한 물분해 시스템의 효율을 향상시키기 위해서는, 수소발생반응 (HER)과 산소발생반응(OER) 각각에서 촉매로 인한 전기화학적 반응에서의 높은 과전압의 감소가 수반되어야 한다. 그 중에서도 전이금속 기반의 화합물 (수산화물 , 황화물 등)은 현재 상용되고 있는 백금 등의 귀금속을 대체할 촉매 재료로써 주목받고 있다. 본 연구에서는, 저렴한 금속 다공성 소재인 Ni foam을 지지체로 사용하고, 수열합성 공정을 통해 β-Ni(OH)₂ 마이크로결정을 합성하고자 하였다. 또한 전기화학적 특성을 향상시키기 위하여 Fe을 도핑하여 합성된 β-Ni(OH)₂ 마이크로 결정의 형상, 결정 구조 및 물분해 특성의 변화를 관찰하였으며, 상용 수전해 시스템의 촉매로서의 적용가능성을 검토하였다.
Abstract
In order to improve the efficiency of the water splitting system for hydrogen energy production, the high overvoltage in the electrochemical reaction caused by the catalyst in the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) must be reduced. Among them, transition metal-based compounds (hydroxide, sulfide, etc.) are attracting attention as catalyst materials to replace currently used precious metals such as platinum. In this study, Ni foam, an inexpensive metal porous material, was used as a support and β-Ni(OH)₂ microcrystals were synthesized through a hydrothermal synthesis process. In addition, changes in the crystal morphology, crystal structure, and water splitting characteristics of β-Ni(OH)₂ microcrystals synthesized by doping Fe to improve electrochemical properties were observed, and applicability as a catalyst in a commercial water electrolysis system was examined.
참고문헌 (17)
- J. Chow, "Energy resources and global development", Science, 302, pp.1528~ (2003)
- T. Yusaf, "Systaninable hydrogen energy in aviation - A narrative review", Int. J. Hydrog. Energy
- J. Alazemi, "Automotive hydrogen fuelling stations : An international review", Renew. Sust. Energ. Rev, 48, pp.483~ (2015)
- Y. Feng, "A nitridation route to construct high-activity interfaces toward alkaline hydrogen evolution", J. Mater. Chem. A, 10, pp.11205~ (2022)
- J. Bak, "Atomic-level manipulations in oxides and alloys for electrocatalysis of oxygen evolution and reduction", ACS Nano, 14, pp.14323~ (2020)
- A. I. Inamdar, "A robust nonprecious CuFe composite as a highly efficient bifunctional catalyst for overall electrochemical water splitting", Small, 16, pp.1905884~ (2020)
- T. Kou, "Ni foam-suported Fe-doped β-Ni(OH)2 nanosheets show ultralow overpotential for oxygen evolution reaction", ACS Energy Lett, 4, pp.622~ (2019)
- G. Zhao, "Heterostructures for electrochemical hydrogen evolution reaction : A review", Adv. Funct. Mater, 28, pp.1803291~ (2018)
- J. Wang, "Recent progress in cobalt-based heterogeneous catalysts for electrochemical water splitting", Adv. Mater, 28, pp.215~ (2016)
- B. You, "Innovative strategies for electrocatalytic water splitting", ACS. Chem. Res, 51, pp.1571~ (2018)
- S. -F. Hung, "Unraveling geometrical site confinement in highly efficient iron-doped electrocatalysts toward oxygen evolution reaction", Adv. Energy Mater, 8, pp.1701686~ (2018)
- S. Anantharaj, "The Fe effect" : A review unveiling the critical roles of Fe in enhancing OER activity of Ni and Co based catalysts", Nano Energy, 80, pp.105514~ (2021)
- S. Yuan, "Nickel foam-supported Fe, Ni-Polyporphyrin microparticles : Efficient bifunctional catalysts for overall water splitting in alkaline media", Int. J. Hydrog. Energy, 45, pp.28860~ (2020)
- X. Yu, "Self-supporting porous CoP-based films with phaseseparation structure for ultrastable overall water electrolysis at large current density", Adv. Energy Mater, 8, pp.1802445~ (2018)
- J. Guo, "Enhanced electrocatalytic acitvity of Mo-doped NiFe layered double hydroxide nanosheet arrays for the hydrogen evolution reaction", ACS Appl. Nano Mater, 6, pp.379~ (2023)
- 이정일, "Electrocatalytic properties of Te incorporated Ni(OH)2 microcrystals grown on Ni foam", 한국결정성장학회지, 31(2), pp.96~101 (2021), 한국결정성장학회[DOI]
- B. You, "Innovative strategies for electrocatalytic water splitting", ACS. Chem. Res, 51, pp.1571~ (2018)