Enhanced hydrogen sorption on modified MIL-101 with Pt/CMK-3 by hydrogen spillover effect

Anbia, Mansoor; Mandegarzad, Sakineh

doi:10.1016/j.jallcom.2012.03.055

Cited by 35 publications

(28 citation statements)

References 39 publications

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“…Within the medium pressure range (up to 35 bar, Figure 5) where hydrogen sorption properties of porous materials are commonly investigated, the isotherm profiles are similar to those earlier reported for various MOFs and their derivatives doped by catalysts [17][18][19][20][21][22][23]25,26]. We have to note that the adsorption-desorption process is completely reversible with negligible hysteresis.…”

Section: Medium Pressure Rangesupporting

confidence: 84%

“…Because the interactions between hydrogen atoms and the porous surface are weak, the great H 2 capacity observed at 77 K dramatically declines with increasing temperature and, as a rule, does not exceed 0.5-1 wt.%. According to the most recent data, MOFs modified, in such a manner, demonstrated uptake of up to 2-2.5 wt.% H at ambient temperature surpassing the capacity of the pristine MOF compounds several times [22,23]. Significant enhancement of the room-temperature hydrogen storage capacity was reported for a combination of highly porous carbon materials or MOFs with an appropriate catalyst (platinum on activated carbon, Pt/C) [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…Significant enhancement of the room-temperature hydrogen storage capacity was reported for a combination of highly porous carbon materials or MOFs with an appropriate catalyst (platinum on activated carbon, Pt/C) [16][17][18][19][20][21]. According to the most recent data, MOFs modified, in such a manner, demonstrated uptake of up to 2-2.5 wt.% H at ambient temperature surpassing the capacity of the pristine MOF compounds several times [22,23]. The authors explained the attractive results by the well-known, in catalytic chemistry, spillover phenomenon that accounts to a dissociative chemisorption of H 2 molecules on catalytically active metal centers (Pt, Pd, Ni, etc.)…”

Section: Introductionmentioning

confidence: 99%

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High-pressure hydrogen storage on modified MIL-101 metal-organic framework

Klyamkin

Chuvikov

Maletskaya

et al. 2014

Int. J. Energy Res.

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SUMMARY Porous chromium(III) oxoterephthalate MIL‐101 possesses an MTN zeolite‐type framework with tetrahedral micropores (diameter ~0.8 nm) and two types of mesopores (diameter ~3.0 and 2.8 nm, respectively). The hybrid MIL‐101/Pt/C composite materials were produced by a bridge building technique by grinding of ternary mixtures of MIL‐101, glucose, and Pt‐catalyst, followed by a bridge formation via a carbonization of glucose at 160 °C. The hydrogen adsorption properties of porous materials were investigated at pressures up to 1000 bar. Excess adsorption isotherms measured volumetrically at temperatures of 81 and 298 K evidence a remarkable effect of the catalyst on the material behaviors under high hydrogen pressure. There is no saturation at room temperature within the studied pressure range as the excess hydrogen sorption capacity increases gradually with pressure and reaches 1.5 wt.% instead of maximum 0.4 wt.% for the pristine MIL‐101. The maximum total H2 uptake at 298 K is estimated to be 6.1 wt.% that leads to a shift of the upper limit of the efficiency of the storage system from 25 to 250 bar as compared with the unmodified metal–organic framework. The results obtained demonstrate feasibility of advanced high‐pressure hydrogen storage systems based on hybrid technology. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Medium Pressure Rangesupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-pressure hydrogen storage on modified MIL-101 metal-organic framework

Klyamkin

Chuvikov

Maletskaya

et al. 2014

Int. J. Energy Res.

View full text Add to dashboard Cite

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“…Consequently, it is important to develop effective adsorbents with short adsorption equilibrium time for the removal of toxic compounds from aqueous solutions. Recent researches show that mesoporous materials (Anbia and Mohammadi 2009a, b;Anbia and Mandegarzad 2012;Anbia and Ghaffari 2009;Anbia et al 2006) can have good selectivity, large adsorption capacity, and improved recoverability for the removal of toxic species from aqueous solutions. Ordered mesoporous materials such as MCM-48, SBA-15, MCM-41, CMK-1, and CMK-3 have attracted much attention owing to their special properties, such as regular framework, high surface area, and narrow pore size distribution.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient adsorption of hexavalent chromium from the aqueous system using nanoporous carbon modified with tetraethylenepentamine

Ghaffari

Husain

Tehrani

et al. 2014

Int. J. Environ. Sci. Technol.

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An oxidized mesoporous carbon material, modified with tetraethylenepentamine, has been developed as a highly efficient adsorbent for hexavalent chromium. Influence of parameters such as adsorbent dose (0.1-0.8 g L -1 ) solution pH (1-9), contact time, and initial concentration (100-1,000 mg L -1 ) on adsorption capacity has been investigated and optimized. The sorption equilibrium was reached within 60 min. The structural order and textural properties of the synthesized material were studied by X-ray diffraction, scanning electron microscopy, Fourier transform infrared, and nitrogen adsorptiondesorption analysis. The experimental results were analyzed by the Langmuir and Freundlich isotherms. The maximum adsorption capacity of 510 mg g -1 at an initial concentration of 1,000 mg L -1 is well predicted by the Freundlich isotherm. The kinetic analysis indicated that the adsorption process was successfully fitted with the pseudofirst-order kinetic model. Compared to other adsorbents reported in the literature, the modified nanoporous carbon material prepared in this study is found to be highly efficient adsorbent for the removal of hexavalent chromium from wastewater.

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“…However, the high absorption capacities are shown only at low temperatures, while the room temperature absorption is much lower [5,8]. Carbon-and boron-based systems also face somewhat similar difficulties, although the discovery of spillover effect has provided some hope [11]. Direct storage of hydrogen in liquid form or in gaseous state under high pressure are expensive routes due to the use of cryogenic temperatures or very high pressures.…”

Section: Introductionmentioning

confidence: 99%