Silver-Nanoparticle-Decorated Fused Carbon Sphere Composite as a Catalyst for Hydrogen Generation

Biehler, Erik; Quach, Qui; Abdel‐Fattah, Tarek M.

doi:10.3390/en16135053

Cited by 11 publications

(3 citation statements)

References 41 publications

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“…Once there are no more hydrogen atoms for water to attack, the remaining tetrahydroxyborate [B(OH)4] can unbind from the copper nanoparticle and a new BH4 -can take its place, repeating the cycle. Finally, the graphene-like materials (GLMs) used in this study showed great promise as catalyst support with agreement with other studies [67][68][69].…”

Section: Resultssupporting

confidence: 90%

Synthesis of Copper Nanoparticles Supported over Graphene-like Material Composite as a Catalyst for Hydrogen Evolution

2023

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The need for an alternative energy source that is both clean and abundant has led to research into a hydrogen economy. Hydrogen gas can be produced slowly via the hydrolysis of sodium borohydride (NaBH4). A catalyst can be used to speed up the rate at which hydrogen is produced, however many catalysts involve relatively expensive materials like precious metals. This study explores a novel copper nanoparticle supported on a graphene-like material composite as a catalyst for the hydrolysis of NaBH4. The material was characterized via powdered X-ray diffraction (P-XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscope (TEM), and Energy Dispersive spectroscopy (EDS). The P-XRD confirmed the crystallinity structures of graphene-like material (GLM) and copper nanoparticles supported over graphene-like material (CuGLM). The P-XRD spectra indicated the (110), (111), and (200) lattice planes of copper nanoparticles. In FTIR analysis, the shifted and sharpening functional group peaks were observed when copper nanoparticles were supported by the GLM template. The TEM result indicated that the copper nanoparticle had a size of approximately 10 nm. The catalyst (CuGLM) was tested under different doses of NaBH4, solution pH, and reaction temperatures. Temperature data were used to determine the activation energy of the reaction to be 46.8 kJ mol−1, which is competitive when compared to similar catalysts. The catalyzed reaction generated the highest volume of hydrogen at pH 8 (51 mL), 303 K (32 mL), and 1225 μmol of NaBH4 (37 mL). The catalyst was found to be able to be used multiple times in succession without any significant loss in hydrogen generated. This catalyst is an exciting option for the sustainable generation of hydrogen gas as a fuel source.

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Section: Resultssupporting

confidence: 90%

Synthesis of Copper Nanoparticles Supported over Graphene-like Material Composite as a Catalyst for Hydrogen Evolution

2023

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“…al. (1985) and also by Grzeschik et al (2020), and in previous work by this research team [ 11 , 12 , 13 , 14 , 33 , 34 , 35 , 36 , 37 ]. It may be that hydroxide ions compete for hydrogen in the solution.…”

Section: Resultssupporting

confidence: 55%

“…This reaction, however, occurs relatively slowly and requires a catalyst to improve the generation rate of hydrogen [ 3 ]. In recent years, precious metal nanoparticles have been utilized for a variety of different applications including gas detection [ 4 ], anti-bacterial properties [ 5 ], optoelectrical properties [ 6 ], as catalysts [ 7 , 8 ], and for hydrogen generation [ 9 , 10 ], including as a catalyst for the hydrolysis of NaBH 4 [ 11 , 12 , 13 , 14 ]. Gold nanoparticles, for instance, are used as catalysts in various chemical reactions.…”

Section: Introductionmentioning

confidence: 99%

Gold Nanoparticles AuNP Decorated on Fused Graphene-like Materials for Application in a Hydrogen Generation

2023

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The search for a sustainable, alternative fuel source to replace fossil fuels has led to an increased interest in hydrogen fuel. This combustible gas is not only clean-burning but can readily be produced via the hydrolysis of sodium borohydride. The main drawback of this reaction is that the reaction occurs relatively slowly and requires a catalyst to improve efficiency. This study explored a novel composite material made by combining gold nanoparticles and fused graphene-like materials (AuFGLM) as a catalyst for generating hydrogen via sodium borohydride. The novel fused graphene-like material (FGLM) was made with a sustainable dextrose solution and by using a pressure-processing method. Imaging techniques showed that FGLM appears to be an effective support template for nanoparticles. Transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) and Raman spectroscopy were used to characterize and determine the size, shape, and structure of nanoparticles and composites. The TEM study characterized the fused carbon backbone as it began to take on a rounder shape. The TEM images also revealed that the average diameter of the gold nanoparticle was roughly 23 nm. The FTIR study confirmed O-H, C-C, and C=O as functional groups in the materials. The EDS analysis showed that the composite contained approximately 6.3% gold by weight. The crystal structures of FGLM and AuFGLM were identified via P-XRD analysis. Various reaction conditions were used to test the catalytic ability of AuFGLM, including various solution pHs, temperatures, and doses of NaBH4. It was observed that optimal reaction conditions included high temperature, an acidic solution pH, and a higher dose of NaBH4. The activation energy of the reaction was determined to be 45.5 kJ mol−1, and it was found that the catalyst could be used multiple times in a row with an increased volume of hydrogen produced in ensuing trials. The activation energy of this novel catalyst is competitive compared to similar catalysts and its ability to produce hydrogen over multiple uses makes the material an exciting choice for catalyzing the hydrolysis of NaBH4 for use as a hydrogen fuel source.

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Design a well-dispersed Ag-based/CoFe2O4–CNT catalyst for hydrogen production via NaBH4 hydrolysis

Abdel-Salam,

Kim,

Moustafa

et al. 2024

Ceramics International

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Silver-Nanoparticle-Decorated Fused Carbon Sphere Composite as a Catalyst for Hydrogen Generation

Cited by 11 publications

References 41 publications

Synthesis of Copper Nanoparticles Supported over Graphene-like Material Composite as a Catalyst for Hydrogen Evolution

Synthesis of Copper Nanoparticles Supported over Graphene-like Material Composite as a Catalyst for Hydrogen Evolution

Gold Nanoparticles AuNP Decorated on Fused Graphene-like Materials for Application in a Hydrogen Generation

Design a well-dispersed Ag-based/CoFe2O4–CNT catalyst for hydrogen production via NaBH4 hydrolysis

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