Spontaneous catalytic activation of Ni3Al thin foils in methanol decomposition

Chun, Dong Hyun; Xu, Ya; Demura, Masahiko; Kishida, Kyosuke; Wee, Dang-Moon; Hirano, Tôru

doi:10.1016/j.jcat.2006.07.011

Cited by 63 publications

(72 citation statements)

References 27 publications

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“…An increase in the water content in the mixture improves the conversion. Small amounts of water (~5%) result in a small improvement in the methanol decomposition -the process begins earlier and reaches a level of 98% at temperatures above 430 O C. This is in contrast to the recent literature, where a comparable level of conversion (98%) [5,6] was obtained at a higher temperature -about 520 O C -for 29 hours. At temperatures similar to those used in our experiment (about 440 O C), the authors of the above-cited literature obtained less than 80% methanol conversion for 65 hours.…”

Section: Methodscontrasting

confidence: 70%

“…4). For both cases of material structures, we obtained carbon nanofibres much smaller than those reported in the literature [5,6]. The metal-like nanoparticles were found to be nanoparticles of pure nickel built in a carbon nanofibre structure.…”

Section: Materials Science Forum Vols 636-637 897mentioning

confidence: 67%

“…Another method for obtaining thin foils (with microcrystalline structures only) was reported by Hirano et al [4], where directionally solidified ingots were rolled at room temperature. For materials obtained according to this method, the authors confirmed good catalytic properties in methanol decomposition [5,6].…”

Section: Introductionmentioning

confidence: 62%

“…Foils with thickness about 60 µm, mechanically cut into small pieces (6 x 2 mm, total weight 0.4 g per each experiment). Before the catalytic experiments, the foils were annealed in a reducing atmosphere, as described in the current literature [5,6]. The initial feed mixtures with different feed compositions (methanol, water and helium) were introduced into the reactor at a flow rate of 30 ml/min (1.8 l/h).…”

Section: Methodsmentioning

confidence: 99%

“…The main aim of this work is to investigate the influence of Ni 3 Al foil structures (nano and microstructures) on methanol decomposition and to further verify the catalytic activity of materials obtained by author's method [2,3], which differs from that described in the present literature [5,6]. …”

Section: Introductionmentioning

confidence: 99%

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Catalytic Activity of Ni<sub>3</sub>Al Foils in Methanol Reforming

Jóźwik

Grabowski

Bojar

2010

MSF

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Abstract. Intermetallic Ni 3 Al-based alloys (doped with zirconium and boron) represent a group of advanced materials with potential outstanding physical and chemical properties (such as high catalytic activity and structural stability in corrosive environments) that make them a considerable candidate for many high-tech applications. In this paper, the catalytic activity of fully dense Ni 3 Albased thin foils (as thin as 50 µm) possessing structures with micrometer or nanometer grain sizes is discussed. The examined material, without any additional catalytic coating, was successfully produced from as-cast coarse-grained sheets by heavy cold rolling and recrystallisation with an appropriately chosen set of parameters. The examination focuses on methanol and methanol/water mixture decomposition into H 2 and CO at temperatures up to 530 O C in a quartz reactor. Except for these products, a small amount (below 1%) of CO 2 and dimethyl ether was observed. The catalyzed reaction began effectively at about 400 O C, with a methanol conversion of about 90% or higher.

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Section: Methodscontrasting

confidence: 70%

Section: Materials Science Forum Vols 636-637 897mentioning

confidence: 67%

Section: Introductionmentioning

confidence: 62%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Catalytic Activity of Ni<sub>3</sub>Al Foils in Methanol Reforming

Jóźwik

Grabowski

Bojar

2010

MSF

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Tuning the Adsorption Energy of Methanol Molecules Along Ni‐N‐Doped Carbon Phase Boundaries by the Mott–Schottky Effect for Gas‐Phase Methanol Dehydrogenation

et al. 2018

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Engineering the adsorption of molecules on active sites is an integral and challenging part for the design of highly efficient transition‐metal‐based catalysts for methanol dehydrogenation. A Mott–Schottky catalyst composed of Ni nanoparticles and tailorable nitrogen‐doped carbon‐foam (Ni/NCF) and thus tunable adsorption energy is presented for highly efficient and selective dehydrogenation of gas‐phase methanol to hydrogen and CO even under relatively high weight hourly space velocities (WHSV). Both theoretical and experimental results reveal the key role of the rectifying contact at the Ni/NCF boundaries in tailoring the electron density of Ni species and enhancing the absorption energies of methanol molecules, which leads to a remarkably high turnover frequency (TOF) value (356 mol methanol mol−1 Ni h−1 at 350 °C), outpacing previously reported bench‐marked transition‐metal catalysts 10‐fold.

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Tuning the Adsorption Energy of Methanol Molecules Along Ni‐N‐Doped Carbon Phase Boundaries by the Mott–Schottky Effect for Gas‐Phase Methanol Dehydrogenation

et al. 2018

View full text Add to dashboard Cite

Engineering the adsorption of molecules on active sites is an integral and challenging part for the design of highly efficient transition-metal-based catalysts for methanol dehydrogenation. A Mott-Schottky catalyst composed of Ni nanoparticles and tailorable nitrogen-doped carbon-foam (Ni/NCF) and thus tunable adsorption energy is presented for highly efficient and selective dehydrogenation of gas-phase methanol to hydrogen and CO even under relatively high weight hourly space velocities (WHSV). Both theoretical and experimental results reveal the key role of the rectifying contact at the Ni/NCF boundaries in tailoring the electron density of Ni species and enhancing the absorption energies of methanol molecules, which leads to a remarkably high turnover frequency (TOF) value (356 mol methanol mol Ni h at 350 °C), outpacing previously reported bench-marked transition-metal catalysts 10-fold.

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Spontaneous catalytic activation of Ni3Al thin foils in methanol decomposition

Cited by 63 publications

References 27 publications

Catalytic Activity of Ni<sub>3</sub>Al Foils in Methanol Reforming

Catalytic Activity of Ni<sub>3</sub>Al Foils in Methanol Reforming

Tuning the Adsorption Energy of Methanol Molecules Along Ni‐N‐Doped Carbon Phase Boundaries by the Mott–Schottky Effect for Gas‐Phase Methanol Dehydrogenation

Tuning the Adsorption Energy of Methanol Molecules Along Ni‐N‐Doped Carbon Phase Boundaries by the Mott–Schottky Effect for Gas‐Phase Methanol Dehydrogenation

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