Quasicrystal derived catalyst for steam reforming of methanol

Ngoc, B. Phung

doi:10.1016/j.ijhydene.2007.11.019

Cited by 26 publications

(6 citation statements)

References 31 publications

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“…3,4 These include promising catalytic properties and good oxidation resistance [5][6][7][8][9] as well as poor wetting and low-friction coefficients. 3,10,11 A complete undestanding of these properties requires a detailed knowledge of the atomic arrangement at their surface.…”

Section: Introductionmentioning

confidence: 99%

Structural investigation of the (110) surface ofγ-Al4Cu9

et al. 2010

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We present a detailed study of the ͑110͒ surface of the ␥-Al 4 Cu 9 crystal using both experimental methods and first-principles calculations based on density-functional theory. Our experimental approach, using lowenergy electron diffraction, scanning tunneling microscopy ͑STM͒ images, and x-ray photoelectron spectroscopy highlights the presence of two types of surface terminations. Combining experimental results and simulations provides many arguments to match the two observed surfaces with the two puckered terminations built from bulk truncation: ͑i͒ calculations show that these two puckered terminations present lower surface energies compared to another conceivable flat termination obtained also from bulk truncation, ͑ii͒ step height measurements are consistent with calculated interlayer spacings and ͑iii͒ simulated STM images are in reasonable agreement with the experimental ones and mirror the experimental voltage dependence.

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Section: Introductionmentioning

confidence: 99%

Structural investigation of the (110) surface ofγ-Al4Cu9

et al. 2010

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“…Since their discovery by Shechtman et al in 1984 [1], quasicrystals have attracted much interest in the scientific community. Physical and chemical properties have been studied in relation to their unusual symmetries, and innovative applications are expected in various domains [2], particularly in surface coating, due to their specific surface properties [3][4][5][6][7][8]. Since complex metallic alloy (CMA) phases present a periodic structure which is closely related to the one of their parent quasicrystals, they are then useful, as models of the quasicrystalline phases to catch the key features of the more complex quasicrystalline phases [9][10][11].…”

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confidence: 99%

First-principles study of low-index surfaces of the Al₅Co₂complex metallic alloy

Villaseca

Dubois

Gaudry

2010

Philosophical Magazine

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The atomic and electronic structures of the (100) and (001) surfaces of the Al 5 Co 2 complex metallic alloy are studied by ab initio calculations. The relative stability of the possible surface planes built from bulk truncation is calculated and the influence of the atomic surface density, the interlayer spacing and the surface chemical composition on the plane selection is discussed. In addition, we show that the simulated images of scanning tunneling microscopy for each possible termination present a specific signature that appears to be sufficient to experimentally identify the surface plane.

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“…In the methanol decomposition reaction, the quasicrystalline catalyst achieved the highest amount of hydrogen gas generated and the lowest reaction initiation temperature Tsai et al, 2001;Yoshimura et al, 2002;Ngoc et al, 2008). The powder of thermally stable icosahedral (i) Al-Cu-Fe quasicrystal leached with NaOH aqueous solutions shows excellent activity for steam reforming of methanol (Kameoka et al, 2004;Tanabea et al, 2006Tanabea et al, , 2010.…”

Section: Quasicrystals As a Catalyst In Hydrogen Storagementioning

confidence: 99%

Hydrogen Energy in India: Storage to Application

Awasthi¹,

Shahi²,

Srivastava³

et al. 2015

Proceedings of the Indian National Science Academy

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It is well-known that the evolution of society is guided by several environmental strains. One of the important strains existing at this point of time is climate change due to pollution. Other issue of paramount importance is "energy". One of the comparatively new energy vectors which is typically suited for India is "hydrogen". Hydrogen is an indigeneous fuel since it can be produced by dissociating water with a variety of input energies, out of which solar energy is of particular importance. India has both of these in plenty. Hydrogen produced from water burns back to water after use. It is thus climate-friendly, inexhaustible, clean and indigenous fuel. Hydrogen must first be produced, afterwards stored, and then used, particularly in vehicular transport. Hydrogen storage is the crucial issue of hydrogen economy, cutting across production, distribution and applications. Finding efficient materials capable of storing hydrogen with high gravimetric and volumetric efficiencies is the central issue for harnessing hydrogen to replace fossil fuel oil (petroleum). We have brought out the relevance of hydrogen, particularly its storage aspect. The study then focuses on various aspects of hydrogen storage materials. The article describes some hydrogen-fuelled devices with particular emphasis on vehicular transport (three-wheelers and small cars).

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Quasicrystal derived catalyst for steam reforming of methanol

Cited by 26 publications

References 31 publications

Structural investigation of the (110) surface ofγ-Al4Cu9

Structural investigation of the (110) surface ofγ-Al4Cu9

First-principles study of low-index surfaces of the Al₅Co₂complex metallic alloy

Hydrogen Energy in India: Storage to Application

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Quasicrystal derived catalyst for steam reforming of methanol

Cited by 26 publications

References 31 publications

Structural investigation of the (110) surface ofγ-Al4Cu9

Structural investigation of the (110) surface ofγ-Al4Cu9

First-principles study of low-index surfaces of the Al5Co2complex metallic alloy

Hydrogen Energy in India: Storage to Application

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First-principles study of low-index surfaces of the Al₅Co₂complex metallic alloy