On the interactions of Ti2AlC, Ti3AlC2, Ti3SiC2 and Cr2AlC with palladium at 900 °C

Bentzel, Grady W.; Sokol, Maxim; Griggs, Justin; Lang, Andrew C.; Barsoum, Michel W.

doi:10.1016/j.jallcom.2018.08.127

Cited by 13 publications

(4 citation statements)

References 52 publications

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“…[18,19] Due to their thermal stability and resistance to fracturing, MAX phases have mainly been used for mechanical and thermal applications, [20,21] such as structural coatings in fission and fusion reactors. [22,23] Recently, we showed that MAX phases also have interesting catalytic properties. Though a carbide, Ti 3 AlC 2 MAX phase catalyzed butane oxidative dehydrogenation (ODH) with a higher selectivity than common oxide materials.…”

Section: Introductionmentioning

confidence: 99%

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Butane Dry Reforming Catalyzed by Cobalt Oxide Supported on Ti₂AlC MAX Phase

et al. 2020

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MAX (M n + 1 AX n) phases are layered carbides or nitrides with a high thermal and mechanical bulk stability. Recently, it was shown that their surface structure can be modified to form a thin non-stoichiometric oxide layer, which can catalyze the oxidative dehydrogenation of butane. Here, the use of a Ti 2 AlC MAX phase as a support for cobalt oxide was explored for the dry reforming of butane with CO 2 , comparing this new catalyst to more traditional materials. The catalyst was active and selective to synthesis gas. Although the surface structure changed during the reaction, the activity remained stable. Under the same conditions, a titania-supported cobalt oxide catalyst gave low activity and stability due to the agglomeration of cobalt oxide particles. The Co 3 O 4 /Al 2 O 3 catalyst was active, but the acidic surface led to a faster deactivation. The less acidic surface of the Ti 2 AlC was better at inhibiting coke formation. Thanks to their thermal stability and acid-base properties, MAX phases are promising supports for CO 2 conversion reactions.

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Section: Introductionmentioning

confidence: 99%

“…Due to their thermal stability and resistance to fracturing, MAX phases have mainly been used for mechanical and thermal applications, [20,21] such as structural coatings in fission and fusion reactors [22,23] . Recently, we showed that MAX phases also have interesting catalytic properties.…”

Section: Introductionmentioning

confidence: 99%

Butane Dry Reforming Catalyzed by Cobalt Oxide Supported on Ti₂AlC MAX Phase

et al. 2020

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“…Palladium (Pd) and Ti2AlC, Cr2AlC, Ti3AlC2 or Ti3SiC2 diffusion couples were annealed at 900°C for 10 h to test these MAX phases as diffusion barriers against fission products, such as Pd, in TRISO fuel designs [60]. Similar to other interaction tests, Al outward diffusion occurred in the investigated MAX phases, forming MAX phase solid solutions by the ingress of Pd.…”

Section: The Chemical Instability Of Zr2alc In Liquid Lbementioning

confidence: 99%

Compatibility of Zr2AlC MAX phase-based ceramics with oxygen-poor, static liquid lead–bismuth eutectic

et al. 2020

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This work investigates the compatibility of Zr2AlC MAX phase-based ceramics with liquid LBE, and proposes a mechanism to explain the observed local Zr2AlC/LBE interaction. The ceramics were exposed to oxygen-poor (CO  2.210 -10 mass%), static liquid LBE at 500°C for 1000 h. A new Zr2(Al,Bi,Pb)C MAX phase solid solution formed in-situ in the LBE-affected Zr2AlC grains. Out-of-plane ordering was favorable in the new solid solution, whereby A-layers with high and low-Bi/Pb contents alternated in the crystal structure, in agreement with first-principles calculations. Bulk Zr2(Al,Bi,Pb)C was synthesized by reactive hot pressing to study the crystal structure of the solid solution by neutron diffraction.

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“…The content of these morphologies was affected by the W content. In recent years, MAX phase materials (where M is an early transition metal, A is a group IIIA or IVA element, and X is carbon or nitrogen) are often selected as the reinforced phases of the metal matrix of contact materials because of their excellent metal and ceramic properties [8,9,10,11,12,13,14,15]. In particular, Ti 3 Al(Si)C 2 has excellent thermal conductivity, low electrical resistivity ((2.87–3.45) × 10 −7 Ω·m), and a low friction coefficient.…”

Section: Introductionmentioning

confidence: 99%

Erosion Behavior of a Cu-Ti3AlC2 Cathode by Multi-Electric Arc

Huang

Feng

et al. 2019

Materials

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A Cu-Ti3AlC2 cathode was eroded by arc discharging at 10 kV. The cross-sectional and horizontal morphologies of the eroded surface were recorded by a field emission scanning electron microscope (FE-SEM). The energy dispersive X-ray spectroscopy (EDS) and Raman spectrometry were carried out to analyze the compositions. The color-eroded surface was obtained by a three-dimensional laser scanning confocal microscope (3D LSCM). After 100 times of arc erosion, the Cu-Ti3AlC2 melted and resolidified. An eroded layer about 10 μm thick was formed, covered with pits, protrusions, and pores. The breakdown current was kept between 37 to 43 A. Under the action of a high temperature arc, Cu-Ti3AlC2 was oxidized to CuO and TiO2, accompanying the evaporation of the Al element.

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On the interactions of Ti2AlC, Ti3AlC2, Ti3SiC2 and Cr2AlC with palladium at 900 °C

Cited by 13 publications

References 52 publications

Butane Dry Reforming Catalyzed by Cobalt Oxide Supported on Ti₂AlC MAX Phase

Butane Dry Reforming Catalyzed by Cobalt Oxide Supported on Ti₂AlC MAX Phase

Compatibility of Zr2AlC MAX phase-based ceramics with oxygen-poor, static liquid lead–bismuth eutectic

Erosion Behavior of a Cu-Ti3AlC2 Cathode by Multi-Electric Arc

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On the interactions of Ti2AlC, Ti3AlC2, Ti3SiC2 and Cr2AlC with palladium at 900 °C

Cited by 13 publications

References 52 publications

Butane Dry Reforming Catalyzed by Cobalt Oxide Supported on Ti2AlC MAX Phase

Butane Dry Reforming Catalyzed by Cobalt Oxide Supported on Ti2AlC MAX Phase

Compatibility of Zr2AlC MAX phase-based ceramics with oxygen-poor, static liquid lead–bismuth eutectic

Erosion Behavior of a Cu-Ti3AlC2 Cathode by Multi-Electric Arc

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On the interactions of Ti2AlC, Ti3AlC2, Ti3SiC2 and Cr2AlC with palladium at 900 °C

Butane Dry Reforming Catalyzed by Cobalt Oxide Supported on Ti₂AlC MAX Phase

Butane Dry Reforming Catalyzed by Cobalt Oxide Supported on Ti₂AlC MAX Phase