Hydrogen storage in several metal‐phosphate molecular sieves

Dong, Jinxiang; Ban, Guizhi; Zhao, Qiang; Liu, Lei; Li, Jinping

doi:10.1002/aic.11591

Cited by 10 publications

(5 citation statements)

References 19 publications

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“…Recently, ZrPs have been synthesized ionothermally, and some novel two- and three-dimensional materials have been reported. ,,,, These new materials have shown important applications. A few recent examples include catalysis for selective oxidation of cyclohexane, hydrogen storage, photoluminescence, and selective gas adsorption of CO 2 /CH 4 …”

Section: Resultsmentioning

confidence: 99%

“…Recently, several novel two- and three-dimensional framework zirconium phosphates (namely, ZrPO 4 -DES8, ZrPO 4 -DES1, ZrPO 4 -DES2, ZrPOF-pyr, ZrPOF-Q1, ZrPOF-EA, and ZrPOF-DEA) have been papered, for the first time, through ionothermal syntheses by one of us (J. Dong). These materials have many potential industrial applications, such as selective oxidation of cyclohexane in ZrPO 4 -DES1 and ZrPO 4 -DES2, hydrogen storage in ZrPOF-pyr, photoluminescence in ZrPOF-Q1, and selective gas adsorption of CO 2 /CH 4 in ZrPOF-EA . In the second part, the Zr centers in these materials were characterized by 91 Zr SSNMR.…”

Section: Introductionmentioning

confidence: 99%

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Solid-State ⁹¹Zr NMR Characterization of Layered and Three-Dimensional Framework Zirconium Phosphates

et al. 2012

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Layered and open framework zirconium phosphates (ZrPs) have many current and potential applications in the areas of catalysis, sorption, protonic conductors, solar energy storage, crystal engineering, and ion exchange. Characterization of ZrP-based materials is important because understanding the relationship between the properties of these materials and their structures is crucial for developing new uses and for improving their performances in current applications. However, local Zr environments in many ZrPs have not been characterized directly by 91 Zr solid-state NMR (SSNMR). This is because 91 Zn (I = 5/2) is an unreceptive nucleus with many NMR unfavorable characteristics, leading to low sensitivity. In this work, the local environments of the zirconium centers in several ion-exchanged derivatives of layered α-ZrP (K + -, Li + -, Co(NH 3 ) 6 3+ -ZrP) have been probed directly using 91 Zr MAS, static quadrupolar echo, and/or quadrupolar Carr− Purcell−Meiboom−Gill NMR. Several layered and three-dimensional framework zirconium phosphates (ZrPO 4 -DES8, ZrPO 4 -DES1, ZrPO 4 -DES2, ZrPOF-pyr, ZrPOF-Q1, ZrPOF-EA, and ZrPOF-DEA) with novel structures were also examined. Theoretical calculations using the CASTEP and Gaussian model cluster approaches were also performed in order to provide insights into the observed spectra. In addition to 91 Zr SSNMR, 31 P, 13 C, and 19 F SSNMR spectroscopy was also utilized to characterize the above-mentioned materials.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Solid-State ⁹¹Zr NMR Characterization of Layered and Three-Dimensional Framework Zirconium Phosphates

et al. 2012

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“…However, the mesoporous silicas and aluminosilicates [156,157] had very low hydrogen storage capacities of less than 0.5 wt%. Zeolites [148][149][150][151] and mesoporous carbon materials [158,160] had moderate hydrogen storage capacities but were still less than the target of 6.5 wt%. Mokaya and coworkers [152,154,155] prepared zeolite-templated carbons that possessed exceptional capacity to store hydrogen.…”

Section: Hydrogen Storagementioning

confidence: 95%

Zeolites and Molecular Sieves in Fuel Cell Applications

Yeung

Han

2010

Zeolites and Catalysis

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IntroductionZeolites and molecular sieves belong to an important class of natural and synthetic porous materials [1] that find important applications in many industrial processes including chemical separation and purification, chemical synthesis and fuel conversion, and pollution treatment and abatement [2][3][4]. The discovery of MCM-41 in 1992 [5, 6] has attracted research in the synthesis and applications of large pore molecular sieves including ordered mesoporous materials. The mesoporous materials display a greater range of pore sizes and compositions than typical zeolites and molecular sieves, and researches show that they are excellent catalyst, adsorbent, and membrane materials that have potential applications not only in traditional chemical processes but also in microelectronics, sensors, and agriculture [7-10].Fuel cell promises clean and efficient energy generation for stationary, mobile, and portable applications [11]. Striving for enhanced performance, zeolites and mesoporous materials are increasingly used in fuel cells. They were used to increase proton transport, decrease fuel crossover, and improve water management in the electrolyte membrane. They serve as electrode and electrocatalyst in the fuel cell and are also employed in fuel conversion, reforming, and storage. There are a number of excellent reviews on fuel cell electrolyte membranes [12][13][14][15][16][17] and electrode materials [18,19] in the literature, but none includes the recent uses of zeolites and molecular sieves. This chapter reviews the contributions of zeolites and molecular sieves in fuel cell research and is divided into three sections: (i) zeolites in electrolyte membrane, (ii) zeolites in fuel cell electrocatalysis, and (iii) zeolites in fuel processing for fuel cells. Zeolites in Electrolyte MembraneThe electrolyte membrane in a fuel cell separates the anode and cathode reactants and mediates the electrochemical reactions at the electrodes by rapid and selective

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“…Disc was prepared by mixing the 0.5 mg sample with 200 mg of KBr (Merck, for spectroscopy) in an agate mortar and then pressing the result mixture at 2MPa for 1 min. The samples were scanned in the spectra range of 4000 to 370 cm 21 .…”

Section: Ft-ir Analysismentioning

confidence: 99%

“…In addition, the spectra of FPW also presents bands at 1060, 1160, 1420 cm 21 , the characteristic of connection between cellulose and lignin [14]. When the FPW is activated, the C500 and C800 show the wide band at about 3488 to 3100 cm 21 . This is assigned to the OÀ ÀH stretching mode of hexagonal groups and adsorbed water.…”

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confidence: 99%

Production of activated carbon by K₂CO₃ activation treatment of furfural production waste and its application in gas storage

Sun

Yang

Wang

et al. 2010

Env Prog and Sustain Energy

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Activated carbon was produced by K 2 CO 3 chemical activation of furfural production waste. The results showed that the product is essentially microporous carbon whose BET surface area and pore volume when the carbon was activated at 8008C were 2218 m 2 /g and 1.04 cm 3 /g, respectively. The potential usefulness of resultant carbons for gas storage is closely investigated. The hydrogen adsorption study showed that all the carbons exhibited a fast adsorption rate and the carbon activated at 8008C had the largest amount of adsorbed hydrogen due to its greater specific surface area and micropore volume. The hydrogen adsorption capacity of the carbon activated at 8008C can reach 1.7 wt % at 77K 1 atm and 0.48 wt % at 298K 6 MPa, respectively. The isosteric heat of adsorption with zero loading of hydrogen on carbon with the largest specific surface area can be 5 kJ/mol. The adsorption model based on To´th equation together with BenedictWebb-Rubin (BWR) equation of state is proposed for this carbon in adsorbing hydrogen under high pressure.

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Hydrogen storage in several metal‐phosphate molecular sieves

Cited by 10 publications

References 19 publications

Solid-State ⁹¹Zr NMR Characterization of Layered and Three-Dimensional Framework Zirconium Phosphates

Solid-State ⁹¹Zr NMR Characterization of Layered and Three-Dimensional Framework Zirconium Phosphates

Zeolites and Molecular Sieves in Fuel Cell Applications

Production of activated carbon by K₂CO₃ activation treatment of furfural production waste and its application in gas storage

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Hydrogen storage in several metal‐phosphate molecular sieves

Cited by 10 publications

References 19 publications

Solid-State 91Zr NMR Characterization of Layered and Three-Dimensional Framework Zirconium Phosphates

Solid-State 91Zr NMR Characterization of Layered and Three-Dimensional Framework Zirconium Phosphates

Zeolites and Molecular Sieves in Fuel Cell Applications

Production of activated carbon by K2CO3 activation treatment of furfural production waste and its application in gas storage

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Product

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Solid-State ⁹¹Zr NMR Characterization of Layered and Three-Dimensional Framework Zirconium Phosphates

Solid-State ⁹¹Zr NMR Characterization of Layered and Three-Dimensional Framework Zirconium Phosphates

Production of activated carbon by K₂CO₃ activation treatment of furfural production waste and its application in gas storage