• 한국연소학회:학술대회논문집
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• 한국연소학회 2007년도 제34회 KOSCO SYMPOSIUM 논문집
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• pp.37-44
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• 2007

A nickel foam, one of metal foams was seleced as a catalyst support instead of conventional ceramic materials. $Al_2O_3$ was coated on the surface of nickel foam to increase the surface area. $Al_2O_3$ coating process was based on sol-gel process. SEM image was obtained and $Al_2O_3$ coverage was confirmed. Combustion experiments were carried out using SUS combustor and $H_2$/air mixture. Temperatures were measured with different equivalence ratios and $H_2$ flow rates. $H_2$ conversion rates were calculated by the analysis of product gas using gas chromatography. Catalytic combustion of $H_2$ was complete and stable with Pt/$Al_2O_3$ coated nickel foam and influences of water vapor were confirmed during the beginning of combustion.

• 한국분말재료학회지
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• 제17권6호
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• pp.489-493
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• 2010

Nickel-based and iron-based alloys have been developed and commercialized for a wide range of high performance applications at severely corrosive and high temperature environment. This alloy foam has an outstanding performance which is predestinated for diesel particulate filters, heat exchangers, and catalyst support, noise absorbers, battery, fuel cell, and flame distributers in burners in chemical and automotive industry. Production of alloy foam starts from high-tech coating technology and heat treatment of transient liquid-phase sintering in the high temperature. These technology allow for preparation of a wide variety of foam compositions such as Ni, Cr, Al, Fe on various pore size of pure nickel foam or iron foam in order for tailoring material properties to a specific application.

• Nano
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• 제13권11호
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• pp.1850136.1-1850136.12
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• 2018

Three-dimensional (3D) mixed phases NiSe nanoparticles growing on the nickel foam were synthesized via a simple one-step hydrothermal method. A series of experiments were carried out to control the morphology by adjusting the amount of selenium in the synthetic reaction. Meanwhile, the as-prepared novel column-acicular structure NiSe exist three advantages including ideal electrical conductivity, high specific capacity and high cycling stability. It delivered a high capacitance of $10.8F\;cm^{-2}$ at a current density- of $5mA\;cm^{-2}$. An electrochemical capacitor device operating at 1.6 V was then constructed using NiSe/NF and activated carbon (AC) as positive and negative electrodes. Moreover, the device showed high energy density of $31W\;h\;kg^{-1}$ at a power density of $0.81kW\;kg^{-1}$, as well as good cycling stability (77% retention after 1500 cycles).

• 한국표면공학회지
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• 제56권5호
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• pp.299-308
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• 2023

In this study, phosphorus (P)-doped nickel cobaltite (P-NiCo₂O₄) and nickel-cobalt layered double hydroxide (P-NiCo-LDH) were synthesized on nickel (Ni) foam as a conductive support using hydrothermal synthesis. The thermal properties, crystal structure, microscopic surface morphology, chemical distribution, electronic state of the constituent elements on the sample surface, and electrical properties of the synthesized P-NiCo₂O₄ and P-NiCo-LDH samples were analyzed using thermogravimetric analysis-differential scanning calorimetry (TGA-DSC), X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The P-NiCo₂O₄ electrode exhibited a specific capacitance of 1,129 Fg^-1 at a current density of 1 Ag^-1, while the P-NiCo-LDH electrode displayed a specific capacitance of 1,012 Fg^-1 at a current density of 1 Ag-1. When assessing capacity changes for 3,000 cycles, the P-NiCo₂O₄ electrode exhibited a capacity retention rate of 54%, whereas the P-NiCo-LDH electrode showed a capacity retention rate of 57%.

• 한국결정성장학회지
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• 제34권3호
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• pp.92-97
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• 2024

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.

• 한국결정성장학회지
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• 제34권1호
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• pp.30-35
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• 2024

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 화합물들은 현재 상용되고 있는 백금 등의 귀금속을 대체할 촉매 재료로써 주목받고 있다. 본 연구에서는, 저렴한 금속 다공성 소재인 니켈폼(Ni foam)을 지지체로 사용하고, 수열합성 공정을 통해 Fe-doped β-Ni(OH)₂ 마이크로결정을 합성하였다. 또한 OER 특성을 향상시키기 위하여 Mo을 동시도핑하여 합성된 Fe-Mo co-doped β-Ni(OH)₂ 마이크로결정의 형상, 결정구조 및 수전해 특성의 변화를 관찰하였으며, 상용 수전해 시스템의 촉매로서의 적용가능성을 검토하였다.