Hydrogen generation from hydrolysis of sodium borohydride with a novel palladium metal complex catalyst

Şahi̇n, Ömer; Kılınç, Dilek; Saka, Cafer

doi:10.1016/j.joei.2015.02.005

Cited by 49 publications

(8 citation statements)

References 47 publications

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“…It was acknowledged that hydrogen generation rate would speed up with the increase of catalyst amount. The result agreed with other articles …”

Section: Resultssupporting

confidence: 92%

Efficient Hydrolysis of Sodium Borohydride by Co‐B Supported on Nitrogen‐doped Carbon

Wei

et al. 2020

ChemistrySelect

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In this work, dehydrogenation of NaBH 4 in alkaline solutions was catalyzed by amorphous Co-B catalysts supported on nitrogen doped carbon (N-C) that is rarely utilized in this field. The physicochemical properties of the as-prepared catalysts were characterized by X-ray Diffraction (XRD), Field Emission Scanning Electron Microscopy (FESEM), High Resolution Transmission Electron Microscopy (HRTEM), X-ray Photoelectron Spectroscopy (XPS), Raman Spectroscopy and BET (Brunner À Emmet À Teller) measurements. Among all the catalysts made in this paper, Co-B/N-C-700 exhibited best activity, which is likely to be attributed to the possession of more metal Co as active sites. The hydrogen generation rate (HGR) reached 2649 ml H 2 min À 1 g À 1 cat in 10 wt. % NaOH + 10 wt. % NaBH 4 solution at 30 °C. The value of activation energy is 37.57 kJ mol À 1 and compares favorably with values of some previous reports. Besides, influences of NaOH concentration, NaBH 4 concentration, temperature, recycle times and amount of catalyst for the catalytic performance of Co-B/N-C-700 were also investigated to reflect more on hydrolysis of sodium borohydride.

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“…It was acknowledged that hydrogen generation rate would speed up with the increase of catalyst amount. The result agreed with other articles …”

Section: Resultssupporting

confidence: 92%

Efficient Hydrolysis of Sodium Borohydride by Co‐B Supported on Nitrogen‐doped Carbon

Wei

et al. 2020

ChemistrySelect

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“…Recently, hydrogen as clean energy has been considered a key factor in the increasing depletion of fossil fuels and exacerbating the environmental pollution crisis 5 , 6 . Hydrogen is universally accepted as a clean energy source due to its relatively high energy density (142 MJ kg − 1 ) in comparison to diesel and gasoline (46 MJ kg − 1 ) and can reduce the amount of greenhouse gas and acid rain when used as fuel 7 .…”

Section: Introductionmentioning

confidence: 99%

Hydrogen generation of single alloy Pd/Pt quantum dots over Co3O4 nanoparticles via the hydrolysis of sodium borohydride at room temperature

Farrag

Ali

2022

Sci Rep

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To satisfy global energy demands and decrease the level of atmospheric greenhouse gases, alternative clean energy sources are required. Hydrogen is one of the most promising clean energy sources due to its high chemical energy density and near-zero greenhouse gas emissions. A single alloyed phase of Pd/Pt nanoclusters as quantum dots (QDs) was prepared and loaded over Co3O4 nanoparticles with a low loading percentage (1 wt.%) for hydrogen generation from the hydrolysis of NaBH4 at room temperature. L-glutathione (SG) was used as a capping ligand. It was found that the single alloy catalyst (Pd0.5–Pt0.5)n(SG)m/Co3O4 caused a significant enhancement in hydrogen generation in comparison to the monometallic clusters (Pdn(SG)m and Ptn(SG)m). Moreover, the Pd/Pt alloy showed a positive synergistic effect compared to the physical mixture of Pd and Pt clusters (1:1) over Co3O4. The QDs alloy and monometallic Pd and Pt clusters exhibited well-dispersed particle size in ~ 1 nm. The (Pd0.5–Pt0.5)n(SG)m)/Co3O4 catalyst offers a high hydrogen generation rate (HGR) of 8333 mL min− 1 g− 1 at room temperature. The synergistic effect of Pd and Pt atoms in the nanoclusters alloy is the key point beyond this high activity, plus the prepared clusters' unique atomic packing structure and electronic properties. The effect of the NaBH4 concentration, catalyst amount, and reaction temperature (25–60 °C) were investigated, where HGR reaches 50 L min− 1 g− 1 at 60 °C under the same reaction conditions. The prepared catalysts were analyzed by UV–Vis, TGA, HR-TEM, XRD, and N2 adsorption/desorption techniques. The charge state of the Pd and Pt in monometallic and alloy nanoclusters is zero, as confirmed by X-ray photoelectron spectroscopy analysis. The catalysts showed high recyclability efficiency for at least five cycles due to the high leaching resistance of the alloy nanoclusters within the Co3O4 host. The prepared catalysts are highly efficient for energy-based applications.

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“…Compared with their liquid acid counterparts, the solid metal‐based catalysts are more attractive from the perspective of continuous hydrogen production. Noble metals such as Ru, Pd, and Pt are all active for the hydrolysis reaction . However, high cost and low abundance of these noble metals have made it greatly desirable to develop alternative catalysts that are mainly composed of cheaper transition metals.…”

Section: Introductionmentioning

confidence: 99%

“…Noble metals such as Ru, Pd, and Pt are all active for the hydrolysis reaction. [9][10][11][12] However, high cost and low abundance of these noble metals have made it greatly desirable to develop alternative catalysts that are mainly composed of cheaper transition metals. Cobalt is recognized as being a promising catalyst in accelerating NaBH 4 hydrolysis for the reason that it exhibits similar reactivity to noble metals and is much more costeffective.…”

Section: Introductionmentioning

confidence: 99%

Stability and kinetic studies of MOF‐derived carbon‐confined ultrafine Co catalyst for sodium borohydride hydrolysis

Zhang

Zhao

et al. 2019

Int J Energy Res

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Summary A mesoporous carbon‐confined cobalt (Co@C) catalyst was fabricated by pyrolysis of macroscale Co‐metal–organic framework (MOF) crystals and used to catalyze NaBH4 hydrolysis for hydrogen production. To reveal the structural changes of cobalt nanoparticles, we characterized the fresh and used Co@C catalysts using X‐ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), and N2 adsorption. This MOF‐derived Co@C exhibits high and stable activity toward NaBH4 hydrolysis. No obvious agglomeration of Co nanoparticles occurred after five consecutive runs, implying good resistance of Co@C composite to metal aggregation. The kinetics of NaBH4 hydrolysis was experimentally studied by changing initial NaBH4 concentration, NaOH concentration, and catalyst dosage, respectively. It was found that the hydrogen generation rate follows a power law: r = A exp (−45.0/RT)[NaBH4]0.985[cat]1.169[NaOH]−0.451.

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Hydrogen generation from hydrolysis of sodium borohydride with a novel palladium metal complex catalyst

Cited by 49 publications

References 47 publications

Efficient Hydrolysis of Sodium Borohydride by Co‐B Supported on Nitrogen‐doped Carbon

Efficient Hydrolysis of Sodium Borohydride by Co‐B Supported on Nitrogen‐doped Carbon

Hydrogen generation of single alloy Pd/Pt quantum dots over Co3O4 nanoparticles via the hydrolysis of sodium borohydride at room temperature

Stability and kinetic studies of MOF‐derived carbon‐confined ultrafine Co catalyst for sodium borohydride hydrolysis

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