Ultrafine cobalt nanoparticles supported on carbon nanospheres for hydrolysis of sodium borohydride

Zhang, Hongming; Xu, Ganlin; Zhang, Lu; Wang, Wenfeng; Miao, Wenkang; Chen, Kangli; Cheng, Lina; Li, Yuan; Han, Shumin

doi:10.1016/j.renene.2020.08.031

Cited by 53 publications

(17 citation statements)

References 59 publications

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“…On this basis we infer that Co nanoparticles in the prepared catalyst first existed in the form of metallic cobalt. As the number of experiments increased, the borate content on the surface of the Co nanoparticles gradually increased, forming a layer of a strongly adsorbed (poly)borate shell (Figure 9d), similarly to previous observations [13,47,62]. The existence of this shell reduces the contact area between Co nanoparticles and NaBH 4 .…”

Section: Mechanism Analysis On Performance Decrease Of Co@150pc Durin...supporting

confidence: 87%

“…In recent years, relatively inexpensive transition metals [12] (such as Co [13], Ni [14], Cu [15] and Fe [16]) have been observed to exhibit excellent performances in catalytic sodium borohydride hydrolysis, especially metal nanoparticles prepared with transition metals as catalysts. In particular, Co-based catalysts are considered to be particularly attractive in the hydrolysis of NaBH 4 for hydrogen production due to their high activity and relatively low cost [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

“…Among the supporting materials mentioned above, carbon materials such as porous carbon (PC) are the most attractive support due to their chemical inertness and large surface area [24]. At present, the reported porous carbon materials [30] loaded with Co nanoparticles mainly include carbon nanotubes, graphene, activated carbon, organic drugs [31] and polymer materials [13]. Among them, carbon nanotubes, graphene, activated carbon and polymer materials are relatively expensive.…”

Section: Introductionmentioning

confidence: 99%

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Catalytic Hydrogen Evolution of NaBH4 Hydrolysis by Cobalt Nanoparticles Supported on Bagasse-Derived Porous Carbon

Liu

Chu

et al. 2021

Nanomaterials

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As a promising hydrogen storage material, sodium borohydride (NaBH4) exhibits superior stability in alkaline solutions and delivers 10.8 wt.% theoretical hydrogen storage capacity. Nevertheless, its hydrolysis reaction at room temperature must be activated and accelerated by adding an effective catalyst. In this study, we synthesize Co nanoparticles supported on bagasse-derived porous carbon (Co@xPC) for catalytic hydrolytic dehydrogenation of NaBH4. According to the experimental results, Co nanoparticles with uniform particle size and high dispersion are successfully supported on porous carbon to achieve a Co@150PC catalyst. It exhibits particularly high activity of hydrogen generation with the optimal hydrogen production rate of 11086.4 mLH2∙min−1∙gCo−1 and low activation energy (Ea) of 31.25 kJ mol−1. The calculation results based on density functional theory (DFT) indicate that the Co@xPC structure is conducive to the dissociation of [BH4]−, which effectively enhances the hydrolysis efficiency of NaBH4. Moreover, Co@150PC presents an excellent durability, retaining 72.0% of the initial catalyst activity after 15 cycling tests. Moreover, we also explored the degradation mechanism of catalyst performance.

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Section: Mechanism Analysis On Performance Decrease Of Co@150pc Durin...supporting

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Catalytic Hydrogen Evolution of NaBH4 Hydrolysis by Cobalt Nanoparticles Supported on Bagasse-Derived Porous Carbon

Liu

Chu

et al. 2021

Nanomaterials

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“…9,10 As for hydrogen generation materials, especially, borohydrides ( i.e. , NaBH 4 , MgBH 4 , LiBH 4 ), 11–13 light weight metals ( i.e. , Mg and Al) 14,15 and metal hydride ( i.e.…”

Section: Introductionmentioning

confidence: 99%

“…17 Among these approaches, ball milling can effectively improve the activity of Mg by destroying the oxide film and creating a large number of grain boundaries, dislocations, and stacking faults during ball milling. 7,11…”

Section: Introductionmentioning

confidence: 99%

Effect of LiH on the fast hydrolysis and hydrogen generation of MgH₂ by ball milling

et al. 2022

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Polypyrrole regulates Active Sites in Co‐based Catalyst in Direct Borohydride Fuel Cells

Kang,

Liu,

et al. 2024

ChemSusChem

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Direct borohydride fuel cells (DBFCs) convert borohydride (NaBH4) chemical energy into clean electricity. However, catalytic active site deactivation in NaBH4 solution limits their performance and stability. We propose a strategy to regulate active sites in Co‐based catalysts using polypyrrole modification (Co‐PX catalyst) to enhance electrochemical borohydride oxidation reaction (eBOR). As an anode catalyst, the synthesized Co‐PX catalyst exhibits excellent eBOR performance in DBFCs, with current density of 280 mA·cm‐2 and power density of 151 mW·cm‐2, nearly twice that of the unmodified catalyst. The Co‐PX catalyst shows no degradation after 120‐hour operation, unlike the rapidly degrading control. In‐situ electrochemical attenuated total reflection Fourier‐transform infrared spectroscopy (ATR‐FTIRS) and density functional theory (DFT) suggest that polypyrrole‐modified carbon support regulate the charge distribution, increasing oxidation state and optimizing adsorption/desorption of intermediates. A possible reaction pathway is proposed. This work presents a promising strategy for efficient polymer‐modulated catalysts in advanced DBFCs.

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Ultrafine cobalt nanoparticles supported on carbon nanospheres for hydrolysis of sodium borohydride

Cited by 53 publications

References 59 publications

Catalytic Hydrogen Evolution of NaBH4 Hydrolysis by Cobalt Nanoparticles Supported on Bagasse-Derived Porous Carbon

Catalytic Hydrogen Evolution of NaBH4 Hydrolysis by Cobalt Nanoparticles Supported on Bagasse-Derived Porous Carbon

Effect of LiH on the fast hydrolysis and hydrogen generation of MgH₂ by ball milling

Polypyrrole regulates Active Sites in Co‐based Catalyst in Direct Borohydride Fuel Cells

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Ultrafine cobalt nanoparticles supported on carbon nanospheres for hydrolysis of sodium borohydride

Cited by 53 publications

References 59 publications

Catalytic Hydrogen Evolution of NaBH4 Hydrolysis by Cobalt Nanoparticles Supported on Bagasse-Derived Porous Carbon

Catalytic Hydrogen Evolution of NaBH4 Hydrolysis by Cobalt Nanoparticles Supported on Bagasse-Derived Porous Carbon

Effect of LiH on the fast hydrolysis and hydrogen generation of MgH2 by ball milling

Polypyrrole regulates Active Sites in Co‐based Catalyst in Direct Borohydride Fuel Cells

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Product

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Effect of LiH on the fast hydrolysis and hydrogen generation of MgH₂ by ball milling