Novel electrocatalysts for hydrogen evolution based on carbon fibers modified by cobalt phosphides

Strečková, M.; Oriňáková, Renáta; Hovancová, Jana; Heckova, M.; Guboova, A.; Girman, Vladimír; Múdra, Erika; Danková, Zuzana; Bekényiová, Alexandra; Dusza, Ján

doi:10.1016/j.apsusc.2019.144927

Cited by 7 publications

(6 citation statements)

References 38 publications

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“…The mechanism of CNTs growth has been previously discussed by many other authors; however, the upraise of CNTs in situ by affecting temperature is very rare (Kumar and Ando 2010;Pérez-Cabero et al 2004;Zhao et al 2006;Yuan et al 2003;Mo et al 2001;Vinciguerra et al 2003). As mentioned in the authors' previous work, Co and Co 2 P nanoparticles can initiate the growth of CNTs as described in the "tip growth model" (Streckova et al 2020). The suggested mechanism of growth and deterioration of carbon nanotubes affected by the prolongation of exposure times at 1200 °C is depicted in Scheme 1.…”

Section: Carbon Fibers Modified By Cobalt Phosphide Nanoparticlesmentioning

confidence: 94%

“…Distinctive properties of carbon materials, such as wide operating potential, large variability of modifications by shaping or easy incorporation into other materials, low cost and inertness against most electrolytes, make them suitable catalysts for HER. However, amorphous carbon is an electroactive inert and possesses poor catalytic activity (Streckova et al 2020). Therefore, it is necessary to supplement other catalysts into the carbonaceous materials that increase their electrocatalytic activity.…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, one may design more suitable carbon structures such as carbon fibers (CFs), carbon nanotubes (CNTs) single-walled CNTs (SWCNTs), graphene, or glassy paper. It is known that the incorporation of transition metal nanoparticles (TMN), such as Co, Cu, Ni, Fe, significantly increases the electrocatalytic activity, the efficiency of catalysts (Zhou et al 2016;Shi and Zhang 2016;Kong et al 2013), and also initiates the growth of carbon nanotubes (CNTs) (Streckova et al 2020). Carbon with tubular nanostructures such as CNTs and SWNTs has attracted considerable attention not only because of its fascinating, unique physicochemical properties, but also due to its promising applications in transistors (Bachtold et al 2001), field-emission tips (Iijima 1991), sensors (Zhu et al 2002), supercapacitors (An et al 2001, and bio-medical fields (Zanello et al 2006).…”

Section: Introductionmentioning

confidence: 99%

“…); ii. modification of CF (Streckova et al 2020)-surface or interior modification by additional nanoparticles or additives (CNT growth on the surface, type of TMN, etc. ); iii.…”

Section: Introductionmentioning

confidence: 99%

“…Cobalt phosphate nanoparticles have been incorporated into the carbon matrix in situ in the heat treatment process and act as the catalysts for CNT growth during sintering. The growth of CNT was performed according to the "Tip growth model" (Streckova et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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Effect of heat treatment on the morphology of carbon fibers doped with Co2p nanoparticles

et al. 2021

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Carbon fibers (CFs) decorated by Co 2 P nanoparticles and carbon nanotubes were prepared via needle-less electrospinning technique. Formation of catalytically active Co 2 P nanoparticles and growth of carbon nanotubes were monitored in open and closed sintering environment at different sintering exposure times. Higher porosity, important in the catalytic reaction for easier penetration of electrolyte into the CFs, was achieved by mixing two immiscible polymers with natrium dodecyl sulfate and subsequent heat treatment process. Structure and morphology of the prepared modified carbon fibers were characterized by XRD, SEM and TEM. The time of heat exposure at the sintering temperature of 1200 °C and closure of the sintering space showed distinct effect on the growth and shape of carbon nanotubes. SEM and Raman spectroscopy revealed that closure of the system led to the formation of carbon nanotubes with smaller diameters and less structural disorder. Comparing of as-prepared CFs revealed that CFs with Co 2 P sintered in the closed system exhibited the best electrocatalytic activity for hydrogen evolution reaction due to lower overpotential and smaller Tafel slope in acidic solution.

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Section: Carbon Fibers Modified By Cobalt Phosphide Nanoparticlesmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…); ii. modification of CF (Streckova et al 2020)-surface or interior modification by additional nanoparticles or additives (CNT growth on the surface, type of TMN, etc. ); iii.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of heat treatment on the morphology of carbon fibers doped with Co2p nanoparticles

et al. 2021

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Carbon fiber and carbon fiber composites—creating defects for superior material properties

Nitai,

Chowdhury,

Inam

et al. 2024

Adv Compos Hybrid Mater

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Recent years have seen a rise in the use of carbon fiber (CF) and its composite applications in several high-tech industries, such as the design of biomedical sensor components, 3D virtual process networks in automotive and aerospace parts, and artificial materials or electrodes for energy storage batteries. Since pristine CF have limited properties, their properties are often modified through a range of technologies, such as laser surface treatment, electron-beam irradiation grafting, plasma or chemical treatments, electrophoretic deposition, carbonization, spinning-solution or melt, electrospinning, and sol–gel, to greatly improve their properties and performance. These procedures cause faulty structures to emerge in CF. The characteristics and performances of CF (thermo-electric conductivity, resistivity, stress tolerance, stiffness and elasticity, chemical resistivity, functionality, electrochemical properties, etc.) vary greatly depending on the modification technique used. Thus, the purpose of this review is to demonstrate how the insertion of faults can result in the production of superior CF. The characteristics of CF defects were examined using a variety of analytical techniques, such as defect-forming chemistry, molecular organization, and ground-level chemistries like their crystallinities. Finally, some future work is also included. Graphical abstract

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Effectively engineering in situ coupled cobalt-cobalt phosphide nanoparticles with nitrogen-doped carbon materials for advanced bifunctional oxygen electrocatalysts in rechargeable Zn-air batteries

Zhu

Wang

et al. 2022

Journal of Alloys and Compounds

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Novel electrocatalysts for hydrogen evolution based on carbon fibers modified by cobalt phosphides

Cited by 7 publications

References 38 publications

Effect of heat treatment on the morphology of carbon fibers doped with Co2p nanoparticles

Effect of heat treatment on the morphology of carbon fibers doped with Co2p nanoparticles

Carbon fiber and carbon fiber composites—creating defects for superior material properties

Effectively engineering in situ coupled cobalt-cobalt phosphide nanoparticles with nitrogen-doped carbon materials for advanced bifunctional oxygen electrocatalysts in rechargeable Zn-air batteries

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