Catalytic activity of amine functionalized titanium dioxide nanoparticles in methanolysis of sodium borohydride for hydrogen generation

Demirci, Şahin; Sunol, Aydın K.; Şahiner, Nurettin

doi:10.1016/j.apcatb.2019.118242

Cited by 71 publications

(14 citation statements)

References 62 publications

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“…Generally, the rate of NaBH 4 methanolysis is much faster than its hydrolysis rate under the same conditions. As shown in Figure S6, for the methanolysis reactions at 20, 25, and 30 °C, it took 8.0, 4.8, and 2.8 min respectively to produce 259 mL H 2 , which were comparable with the results reported in previous studies …”

Section: Resultsmentioning

confidence: 99%

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

et al. 2019

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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.

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Section: Resultsmentioning

confidence: 99%

“…As shown in Figure S6, for the methanolysis reactions at 20, 25, and 30°C, it took 8.0, 4.8, and 2.8 min respectively to produce 259 mL H 2 , which were comparable with the results reported in previous studies. [55][56][57][58]…”

Section: Resultsmentioning

confidence: 99%

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

et al. 2019

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“…The newly generated peaks at 1327 and 1327 cm −1 are characteristic of the B O bond 54,55 in B(OCH 3 ) 4 − for T-PEI + and P-PEI + sand catalysts, respectively, after the fifth use. Regeneration carried out with 1M HCl resulted in the disappearance of the B O FT-IR peaks and a concomitant increase in catalytic activity, as the surface of the catalyst was freed from the dehydrogenation byproduct.…”

Section: Reusability and Regeneration Capability Of Sands As Catalystmentioning

confidence: 97%

PEI modified natural sands of Florida as catalysts for hydrogen production from sodium borohydride dehydrogenation in methanol

et al. 2020

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Summary Sand samples from Tampa (T) and Panama (P) City beaches in Florida were used as catalysts for dehydrogenation of NaBH4 in methanol. T and P sand samples were sieved to <250, 250 to 500, and >500 μm sizes, and the smallest fractions resulted in faster hydrogen generation rates (HGR), 565 ± 18 and 482 ± 24 mL H2 (min.g of catalyst)−1, respectively. After various base/acid treatments, HGR values of 705 ± 51 and 690 ± 47 mL H2 (min g of catalyst)−1 for HCl‐treated T and P sand samples were attained, respectively. Next, T and P sand samples were modified with polyethyleneimine (PEI) that doubled the HGR values, 1344 ± 103, and 1190 ± 87 mL H2 (min.g of catalyst)−1 and increased ~8‐fold, 4408 ± 187, and 3879 ± 169 mL H2 (min g of catalyst)−1, correspondingly after protonation (PEI+). The Ea values of T and P sand samples were calculated as 24.6 and 25.9 kJ/mol, and increased to 36.1, and 36.6 kJ/mol for T‐PEI+ and P‐PEI+ samples, respectively.

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“…Literatürde hazırlanan birçok destekli katalizör mevcuttur. Kullanılan destek malzemelerine örnek olarak ticari aktif karbon [11], grafen [12], karbon nanotüp [13], Al2O3 [14] ve TiO2 [15]…”

Section: Introductionunclassified

Nar kabuğu destekli NH2/PdMnAg katalizörü varlığında sodyum bor hidrürün metanolizinin araştırılması

Karakaş

2021

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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Bu çalışmada, organik atık kaynaklarından olan nar kabuğu, katalizör üretimi için ilk kez doğrudan destek malzemesi olarak kullanılmıştır. Amaç, yenilenebilir bir enerji kaynağı olan hidrojen üretimi için kullanılabilecek metal içeren katalizörlerde kullanılacak olan destek maddesini doğrudan kullanarak yüksek etkinliğe sahip bir katalizör sentezlemektir. Çalışma kapsamında toz haline getirilmiş nar kabuğu üzerine etanol eklenerek, daha sonra üzerine sırasıyla belirli oranlarda (0.3 Pd (mg metal/g katalizör)), (0.15 Mn (mg metal/g katalizör)), (0.075 Ag (mg metal/g katalizör)) ve 3aminopropiltrimetoksisilan ilave edilerek katalizör sentezlenmiştir. Son olarak, elde edilen katalizör sodyum bor hidrürün metanoliz reaksiyonunda hidrojen üretiminde kullanılmak üzere performansı test edilmiştir.

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Catalytic activity of amine functionalized titanium dioxide nanoparticles in methanolysis of sodium borohydride for hydrogen generation

Cited by 71 publications

References 62 publications

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

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

PEI modified natural sands of Florida as catalysts for hydrogen production from sodium borohydride dehydrogenation in methanol

Nar kabuğu destekli NH2/PdMnAg katalizörü varlığında sodyum bor hidrürün metanolizinin araştırılması

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