Fiber-shaped Co modified with Au and Pt crystallites for enhanced hydrogen generation from sodium borohydride

Zabielaitė, Aušrinė; Balčiūnaitė, Aldona; Stalnioniene, Irena; Lichušina, S.; Šimkūnaitė, Dijana; Vaičiūnienė, Jūratė; Šimkūnaitė-Stanynienė, Birutė; Selskis, Algirdas; Tamašauskaitė–Tamašiūnaitė, Loreta; Norkus, Eugenijus

doi:10.1016/j.ijhydene.2018.10.179

Cited by 36 publications

(22 citation statements)

References 64 publications

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“…The E a of the catalyzed reactions was calculated at about 32.01 kJ mol −1 (Figure b). This value is comparable with or even less than the activation energy of many other NaBH 4 hydrolysis reactions catalyzed by metal catalysts (32.66 kJ mol −1 for hydrogel‐Ni composites, 36.4 kJ mol −1 for Ru/ZIF‐67, 40.7 kJ mol −1 for AuCo/Cu, 49.2 kJ mol −1 for Co/Fe 3 O 4 @C, 56.9 kJ mol −1 for Co@C composites, etc.). It indicates that the fabricated SiO 2 @H + PEI catalyst has great potential in practical H 2 production applications.…”

Section: Resultssupporting

confidence: 90%

“…In the last years, varieties of metal catalysts for promoting NaBH 4 hydrolysis, including Ru, Pd, Ag, Mn, Co, Ni, and complexes of them, 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%

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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: Resultssupporting

confidence: 90%

Section: Introductionmentioning

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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“…NaBH 4 'ün hidroliz reaksiyonunda platin (Pt) [19], rutenyum (Ru) [20] ve paladyum (Pd) [21] bazlı katalizörler yaygın olarak kullanılmaktadır. Bu katalizörler, yüksek aktivite göstermelerine rağmen, yüksek maliyetleri nedeniyle geniş çaplı uygulamalarda kullanımlarını sınırlamaktadır [22]. Son zamanlarda yapılan çalışmalarda düşük maliyetli, dayanıklı, ve verimli alternatifler bulma ihtiyacından dolayı, kobalt (Co) [23], nikel (Ni) [24], manganez (Mn) [25] ve bakır (Cu) [26] gibi geçiş metalleri birçok çalışmada tercih edilmiştir.…”

Section: Giriş (Introduction)unclassified

Optimization of Ni-B Catalyst with Response Surface Methodology in Hydrogen Production

Elçiçek¹

2021

Journal of Boron

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Son günlerde yaşanan COVID-19 salgını, temiz ve yenilenebilir enerji kaynaklarının kullanımının ne derece önemli olduğunu birkez daha göstermiştir. Bu çalışmada, geleceğin enerji kaynağı olarak düşünülen temiz hidrojen, Ni-B katalizörleri kullanılarak NaBH 4 'ün hidrolizi ile üretilmiştir. Hidroliz reaksiyonu esnasında reaksiyon kinetiğine doğrudan etkisinin olduğu bilinen ortam sıcaklığı, karıştırma hızı, katı-sıvı oranı ve kullanılan yakıtta NaBH 4 _ NaOH oranı gibi parametrelerin reaksiyon hızına olan etkileri yanıt yüzey metodu ile ayrıntılı olarak incelenmiştir. Kullanılan yanıt yüzey metodunda deneysel çalışmalar Taguchi L9 ortogonal dizisi kullanılarak gerçekleştirilmiş ve parametrelerin etkinliği varyans analizi ile belirlenmiştir. Oluşturulan model sonucunda, maksimum hidrojen üretim hızının eldesi için optimum parametreler; ortam sıcaklığı 347,17ºK; karıştırma hızı 200,21 rpm; katı-sıvı oranı 2,86 mg katalizör /ml yakıt ; ve NaBH 4--NaOH oranı 1,04 olarak belirlenmiştir. Varyans analizine göre hidrojen üretim hızını etkileyen parametrelerin etkinliği sırasıyla reaksiyon sıcaklığı, karıştırma hızı ve NaBH 4 _ NaOH oranı olarak belirlenmiştir. Buna karşılık katı-sıvı oranının etkisinin belirgin bir şekilde ortaya çıkmadığı görülmüştür. Yanıt yüzey yöntemi kullanılarak geliştirilen modelden elde edilen tahmin sonuçları ile deneysel verilerin birbirilerini doğruladığı, yapılan doğrulama deneyleri sonucunda ortaya konulmuştur.

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“…Previous studies showed that noble metals, such as platinum (Pt) [ 28 ], ruthenium (Ru) [ 29 ], and palladium (Pd) [ 30 ], are effective catalysts for the hydrolysis of NaBH 4 . Even though these catalysts show high stability and excellent catalytic activity, their expensive cost restrains their usage in wide applications [ 31 ]. The need to find durable, efficient, and cheap alternatives has led to further research works.…”

Section: Introductionmentioning

confidence: 99%

Copper Nanowires as Highly Efficient and Recyclable Catalyst for Rapid Hydrogen Generation from Hydrolysis of Sodium Borohydride

et al. 2020

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Hydrogen (H2) is a clean energy carrier which can help to solve environmental issues with the depletion of fossil fuels. Sodium borohydride (NaBH4) is a promising candidate material for solid state hydrogen storage due to its huge hydrogen storage capacity and nontoxicity. However, the hydrolysis of NaBH4 usually requires expensive noble metal catalysts for a high H2 generation rate (HGR). Here, we synthesized high-aspect ratio copper nanowires (CuNWs) using a hydrothermal method and used them as the catalyst for the hydrolysis of NaBH4 to produce H2. The catalytic H2 generation demonstrated that 0.1 ng of CuNWs could achieve the highest volume of H2 gas in 240 min. The as-prepared CuNWs exhibited remarkable catalytic performance: the HGR of this study (2.7 × 1010 mL min−1 g−1) is ~3.27 × 107 times higher than a previous study on a Cu-based catalyst. Furthermore, a low activation energy (Ea) of 42.48 kJ mol−1 was calculated. Next, the retreated CuNWs showed an outstanding and stable performance for five consecutive cycles. Moreover, consistent catalytic activity was observed when the same CuNWs strip was used for four consecutive weeks. Based on the results obtained, we have shown that CuNWs can be a plausible candidate for the replacement of a costly catalyst for H2 generation.

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Fiber-shaped Co modified with Au and Pt crystallites for enhanced hydrogen generation from sodium borohydride

Cited by 36 publications

References 64 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

Optimization of Ni-B Catalyst with Response Surface Methodology in Hydrogen Production

Copper Nanowires as Highly Efficient and Recyclable Catalyst for Rapid Hydrogen Generation from Hydrolysis of Sodium Borohydride

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