Encapsulated cobalt nanoparticles as a recoverable catalyst for the hydrolysis of sodium borohydride

Li, Jinghua; Hong, Xianyong; Wang, Yilong; Luo, Yumei; Huang, Pengru; Li, Bin; Zhang, Kexiang; Zou, Yongjin; Sun, Lin; Xu, Fen; Rosei, Federico; Verevkin, Sergey P.; Пимерзин, А. А.

doi:10.1016/j.ensm.2020.01.011

Cited by 89 publications

(32 citation statements)

References 92 publications

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“…Ni/BN [47] Redox replacement reaction 25 metal NPs with decreased sizes can considerably enhance the efficiency of H 2 production due to the increased accessible active sites. Previous reports have shown that there are many types of supports, consisting of metallic oxides (e.g., Al 2 O 3 , TiO 2 , SiO 2 ), [27][28][29][30] metal foils, or foam materials (e.g., Cu foil, Ni foam), [31,32] or carbon-based materials (e.g., PGO, carbon, NMGC, graphene, NMC, AC, Ketjen carbon, HPC, KB), [33][34][35][36][37][38][39][40][41] p(HEMA), [42] p(SPM), [43] ZIF-8, [44,45] SAG, [46] and BN [47] ). It can be found that catalysts supported on non-noble metal NPs show remarkable improvement in catalytic efficiency.…”

Section: Single Non-noble Metalsmentioning

confidence: 99%

Non‐Noble Metal‐Based Catalysts Applied to Hydrogen Evolution from Hydrolysis of Boron Hydrides

Wang

et al. 2021

Small Structures

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Section: Single Non-noble Metalsmentioning

confidence: 99%

Non‐Noble Metal‐Based Catalysts Applied to Hydrogen Evolution from Hydrolysis of Boron Hydrides

Wang

et al. 2021

Small Structures

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“…During recent few years, researchers are showing their avid interest on borohydride fuel cell because the usage of liquid fuels in these cells gives good volumetric and gravimetric energy density [2,3] and authorizes a bit of large theoretical open-circuit potential of 1.64 V [2,4]. On the other hand, sodium borohydride (NaBH 4 ) has high hydrogen content (10.8 wt%), non-toxicity, low cost, and comparatively high stability in solution and solid states [5]. Fed with borohydride and alcohols like ethylene glycol or methanol in liquid fuels, it became an alternative of hydrogen in low-temperature fuel cells [6,7].…”

Section: Introductionmentioning

confidence: 99%

Surfactant-free synthesis of carbon-supported silver (Ag/C) nanobars as an efficient electrocatalyst for alcohol tolerance and oxidation of sodium borohydride in alkaline medium

et al. 2021

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We have synthesized carbon-supported silver (Ag/C) nanobars by a simple surfactant-free hydrothermal method using glucose as the reducing reagent as well as the source of carbon in Ag/C nanobars. Physicochemical characterization of the materials was performed by X-ray Diffraction (XRD), field emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The XRD pattern confirmed the presence of a pure metallic silver phase. No carbon phase was detected, which indicates that the carbon exists mainly in the amorphous form. The electrocatalytic activity of Ag/C in different electrolyte solutions such as 0.5 M NaOH, 0.5 M NaOH + 1 M ethanol (EtOH), 0.5 M NaOH + 1 M ethylene glycol (EG), and 0.5 M NaOH + 0.01 M NaBH4 (sodium borohydride) was studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA) study. Alcohol tolerance of the catalysts was also established in the presence of ethanol and ethylene glycol. The forward-to-backward current ratio from cyclic voltammetry (CV) study of Ag/C-20 (20 h) in 0.5 M NaOH + 1 M ethanol solution at 100 mV s−1 scan rate is 4.13 times higher compared to that of Ag/C-5 (5 h). Hence, Ag/C-20 is a better candidate for the tolerance of ethanol. In the presence of ethylene glycol (1 M) in 0.5 M NaOH solution, it is obtained that the forward-to-backward current ratio at the same scan rate for Ag/C-20 is lower than that in the presence of ethanol. The durability of the catalyst was studied by chronoamperometry measurement. We studied the electrochemical kinetics of Ag/C catalysts for borohydride oxidation in an alkaline medium. The basic electrochemical results for borohydride oxidation show that Ag/C has very well strength and activity for direct borohydride oxidation in an alkaline medium. The reaction of borohydride oxidation with the contemporaneous BH4−. hydrolysis was noticed at the oxidized silver surface. Among all the synthesized Ag/C catalysts, Ag/C-20 exhibited the best electrocatalytic performance for borohydride oxidation in an alkaline medium. The activation energy and the number of exchange electrons at Ag/C-20 electrode surface for borohydride electro-oxidation were estimated as 57.2 kJ mol−1 and 2.27, respectively.

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“…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%

“…In our previous work [31], we synthesized nitrogen-doped mesoporous graphitic carbon-coated cobalt nanoparticles (Co@NMGC) with a core-shell structure by carbonizing carbon derived from ethylenediaminetetraacetic acid (EDTA). However, the specific surface area of Co@NMGC is only 124.55 m 2 •g −1 , and the cobalt nanoparticles coated with graphite carbon cannot effectively contact and react with NaBH 4 , resulting in an optimal hydrogen production rate of Co@NMGC of only 3575 mL min −1 g −1 .…”

Section: Introductionmentioning

confidence: 99%

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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Encapsulated cobalt nanoparticles as a recoverable catalyst for the hydrolysis of sodium borohydride

Cited by 89 publications

References 92 publications

Non‐Noble Metal‐Based Catalysts Applied to Hydrogen Evolution from Hydrolysis of Boron Hydrides

Non‐Noble Metal‐Based Catalysts Applied to Hydrogen Evolution from Hydrolysis of Boron Hydrides

Surfactant-free synthesis of carbon-supported silver (Ag/C) nanobars as an efficient electrocatalyst for alcohol tolerance and oxidation of sodium borohydride in alkaline medium

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

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