Hydrogen generation from methanolysis of sodium borohydride over Co/Al2O3 catalyst

Xu, Dongyan; Zhao, Lin; Dai, Ping; Ji, Shengfu

doi:10.1016/s1003-9953(11)60395-2

Cited by 98 publications

(29 citation statements)

References 29 publications

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“…In our previous work, NieCoeP/g-Al 2 O 3 catalysts synthesized by electroless deposition remain high hydrogen generation rate after 10 circles, proving that g-Al 2 O 3 carrier is favorable to enhance the cycling capability of catalysts [28]. Haghtalab A et al [29], Lu YC et al [30], Xu DY et al [31] and Huang YH et al [32] also reported the use of g-Al 2 O 3 loaded with metal catalysts for hydrogen generation from sodium borohydride solution. Herein, we prepared CoeWeP catalysts supported on the g-Al 2 O 3 catalysts by electroless deposition and studied the influences of preparation conditions and hydrolysis reaction conditions on their catalytic activity systematically.…”

Section: Introductionmentioning

confidence: 96%

Hydrogen generation from alkaline NaBH 4 solution using electroless-deposited Co–W–P supported on γ-Al 2 O 3

Wang

Liu

et al. 2015

International Journal of Hydrogen Energy

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Section: Introductionmentioning

confidence: 96%

Hydrogen generation from alkaline NaBH 4 solution using electroless-deposited Co–W–P supported on γ-Al 2 O 3

Wang

Liu

et al. 2015

International Journal of Hydrogen Energy

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“…The gravimetric H 2 storage capacity of methanolysis of NaBH 4 is 4.9 wt.% , and there are many advantages of the methanolysis system compared with the hydrolysis system. The by‐product of the methanolysis reaction (NaB(OCH 3 ) 4 ) does not have the tendency to block the reactor, and spontaneous methanolysis reaction has been estimated to have greater rate constants than the hydrolysis reaction . Moreover, the methanolysis reaction provides the significant advantage of producing H 2 at subzero temperatures because of the low melting point of methanol.…”

Section: Introductionmentioning

confidence: 99%

Very fast H₂production from the methanolysis of NaBH₄by metal-free poly(ethylene imine) microgel catalysts

Şahiner

Demirci

2016

Int. J. Energy Res.

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Summary The polyethyleneimine (PEI) microgels prepared via microemulsion polymerization are protonated by hydrochloric acid treatment (p‐PEI) and quaternized (q‐PEI) via modification reaction with methyl iodide and with bromo alkanes of different alkyl chain lengths such as 1‐bromoethane, 1‐bromobutane, 1‐bromohexane, and 1‐bromooctane. The bare p‐PEI and q‐PEI microgels are used as catalysts directly without any metal nanoparticles for the methanolysis reaction of sodium borohydride (NaBH4). Various parameters such as the protonation/quaternization reaction on PEI microgels, the amount of catalyst, the amount of NaBH4, and temperature are investigated for their effects on the hydrogen (H2) production rate. The reaction of self‐methanolysis of NaBH4 finishes in about 32.5 min, whereas the bare PEI microgel as catalyst finishes the methanolysis of NaBH4 in 22 min. Surprisingly, it is found that when the protonated PEI microgels are used as catalyst, the same methanolysis of NaBH4 is finished in 1.5 min. The highest H2 generation rate value is observed for protonated PEI microgels (10 mg) with 8013 mL of H2/(g of catalyst.min) for the methanolysis of NaBH4. Moreover, activation parameters are also calculated with activation energy value of 23.7 kJ/mol, enthalpy 20.9 kJ/mol, and entropy −158 J/K.mol. Copyright © 2016 John Wiley & Sons, Ltd.

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“…Moreover, ammonia offers significant advantages in convenience as a vehicular fuel due to its higher density and easier storage and distribution [8,9]. In contrast to other similar hydrogen carriers, such as methanol [10,11], ammonia does not release CO x during its decomposition which will cause greenhouse effect. In present, there are two feasible ways for ammonia decomposition to produce hydrogen and nitrogen.…”

Section: Introductionmentioning

confidence: 99%

Electrolysis of ammonia for hydrogen production catalyzed by Pt and Pt-Ir deposited on nickel foam

Jiang

Zhu

Zhao

2014

Journal of Energy Chemistry

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Electrolysis of ammonia in alkaline electrolyte solution was applied for the production of hydrogen. Both Pt-loaded Ni foam and Pt-Ir loaded Ni foam electrodes were prepared by electrodeposition and served as anode and cathode in ammonia electrolytic cell, respectively. The electrochemical behaviors of ammonia in KOH solution were individually investigated via cyclic voltammetry on three electrodes, i.e. bare Ni foam electrode, Pt-loaded Ni foam electrode and Pt-Ir loaded Ni foam electrode. The morphology and composition of the prepared Ni foam electrode were analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Effects of the concentration of electrolyte solution and temperature of electrolytic cell on the electrolysis reaction were examined in order to enhance the efficiency of ammonia electrolysis. The competition of ammonia electrolysis and water electrolysis in the same alkaline solution was firstly proposed to explain the changes of cell voltage with the electrolysis proceeding. At varying current densities, different cell voltages could be obtained from galvanostatic curves. The low cell voltage of 0.58 V, which is less than the practical electrolysis voltage of water (1.6 V), can be obtained at a current density of 2.5 mA/cm 2 . Based on some experimental parameters, such as the applied current, the resulting cell voltage and output of hydrogen gas, the power consumption per gram of H 2 produced can be estimated.

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Hydrogen generation from methanolysis of sodium borohydride over Co/Al2O3 catalyst

Cited by 98 publications

References 29 publications

Hydrogen generation from alkaline NaBH 4 solution using electroless-deposited Co–W–P supported on γ-Al 2 O 3

Hydrogen generation from alkaline NaBH 4 solution using electroless-deposited Co–W–P supported on γ-Al 2 O 3

Very fast H₂production from the methanolysis of NaBH₄by metal-free poly(ethylene imine) microgel catalysts

Electrolysis of ammonia for hydrogen production catalyzed by Pt and Pt-Ir deposited on nickel foam

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Hydrogen generation from methanolysis of sodium borohydride over Co/Al2O3 catalyst

Cited by 98 publications

References 29 publications

Hydrogen generation from alkaline NaBH 4 solution using electroless-deposited Co–W–P supported on γ-Al 2 O 3

Hydrogen generation from alkaline NaBH 4 solution using electroless-deposited Co–W–P supported on γ-Al 2 O 3

Very fast H2production from the methanolysis of NaBH4by metal-free poly(ethylene imine) microgel catalysts

Electrolysis of ammonia for hydrogen production catalyzed by Pt and Pt-Ir deposited on nickel foam

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Very fast H₂production from the methanolysis of NaBH₄by metal-free poly(ethylene imine) microgel catalysts