CoB supported on Ag-activated TiO2 as a highly active catalyst for hydrolysis of alkaline NaBH4 solution

Shen, Xiaochen; Wang, Qing; Wu, Qingbiao; Guo, Siqi; Zhang, Zhengyan; Sun, Ziyang; Liu, Baishu; Wang, Zhibin; Zhao, Bin; Ding, Weiping

doi:10.1016/j.energy.2015.07.075

Cited by 64 publications

(16 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The E a of 24.0 ± 0.4 kJ/mol and activation ΔH and ΔS values of 21.3 ± 0.4 kJ/mol and −159 ± 1.5 J/mol.K were calculated and are given in Table along with some activation parameters reported in the literature. The E a value of the methanolysis reaction of NaBH 4 catalyzed by p‐PEI microgels is lower than that of some hydrolysis reactions of NaBH 4 catalyzed by PEI‐M composites and other hydrolysis of NaBH 4 reactions . The methanolysis of NaBH 4 reaction catalyzed by p‐PEI microgels with 24.0 ± 0.4 kJ/mol is also lower than some of the metal‐catalyzed alcoholysis reactions reported in the literature .…”

Section: Resultsmentioning

confidence: 60%

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

Şahiner

Demirci

2016

Int. J. Energy Res.

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 60%

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

Şahiner

Demirci

2016

Int. J. Energy Res.

View full text Add to dashboard Cite

show abstract

“…In recent years, Co-B catalysts doped with Mn, 92 Ti, 93 Ce 94 and Zn 95 have been investigated and they also showed positive promotion effects on the hydrogen evolution of NaBH 4 hydrolysis. Another efficient route to enhance the catalytic performance is by supporting Co-B NPs in a support material, such as carbon, [96][97][98] [99][100][101] and Ni foam. 102,103 The above supports can effectively inhibit the agglomeration of metal NPs and increase the active sites of the catalysts, and therefore can effectively improve the catalytic activity of the catalysts.…”

Section: Metal Boride Catalystsmentioning

confidence: 99%

Noble-metal-free nanocatalysts for hydrogen generation from boron- and nitrogen-based hydrides

Yao

Ding

2020

Inorg. Chem. Front.

205

View full text Add to dashboard Cite

show abstract

“…In the last years, varieties of metal catalysts for promoting NaBH 4 hydrolysis, including Ru, [12][13][14][15] Pd, [16] Ag, [17] Mn, [18] Co, [19][20][21][22][23][24][25][26][27][28][29] Ni, [20,[30][31][32] and complexes of them, [33][34][35][36][37][38][39][40][41][42] have been extensively investigated. Although these metal catalysts have shown excellent catalytic performance in NaBH 4 hydrolysis, their high cost and complicated fabrication are obstacles on their way to practical applications.…”

Section: Introductionmentioning

confidence: 99%

Protonated Poly(ethylene imine)‐Coated Silica Nanoparticles for Promoting Hydrogen Generation from the Hydrolysis of Sodium Borohydride

et al. 2019

View full text Add to dashboard Cite

Nonmetal catalysts are attracting a great deal of attention because of their advantages including high activity, low cost, and environmental friendliness. In this work, a nonmetal catalyst for NaBH4 hydrolysis was fabricated through covalent modification of silica nanoparticles with protonated poly(ethylene imine). The successful formation of the catalyst was verified by transmission electron microscopy, thermogravimetric analysis, and Fourier transform infrared spectroscopy. The fabricated catalyst shows excellent activity in catalyzing NaBH4 hydrolysis reactions. The hydrolysis of 15 mg NaBH4 catalyzed by 50 mg catalyst could provide a hydrogen generation rate as high as 117.53 mL min−1 gcat-1 at 20 °C. Although the catalytic activity decreased after use, it could be restored easily by regenerating in acetic acid solution.

show abstract

CoB supported on Ag-activated TiO2 as a highly active catalyst for hydrolysis of alkaline NaBH4 solution

Cited by 64 publications

References 61 publications

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

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

Noble-metal-free nanocatalysts for hydrogen generation from boron- and nitrogen-based hydrides

Protonated Poly(ethylene imine)‐Coated Silica Nanoparticles for Promoting Hydrogen Generation from the Hydrolysis of Sodium Borohydride

Contact Info

Product

Resources

About

CoB supported on Ag-activated TiO2 as a highly active catalyst for hydrolysis of alkaline NaBH4 solution

Cited by 64 publications

References 61 publications

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

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

Noble-metal-free nanocatalysts for hydrogen generation from boron- and nitrogen-based hydrides

Protonated Poly(ethylene imine)‐Coated Silica Nanoparticles for Promoting Hydrogen Generation from the Hydrolysis of Sodium Borohydride

Contact Info

Product

Resources

About

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

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