Chemical vapor deposition growth of carbon nanotube confined nickel sulfides from porous electrospun carbon nanofibers and their superior lithium storage properties

Wang, An; Xie, Shejuan; Zhang, Rong; She, Yuanbin; Chen, Chuan; Leung, Michael K. H.; Niu, Chunming; Wang, Hongkang

doi:10.1039/c8na00234g

Cited by 18 publications

(18 citation statements)

References 40 publications

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“…In the N 1s XPS spectrum (Figure S4b, Supporting Information), the three deconvoluted peaks located at 400.1, 403.4, and 406.9 eV can be assigned to pyridine N, pyrrolic N, and sorbed N. [ 33 ] It is also notable that the presence of pyridine type N atoms can increase the electron conduction, thus favoring the rate performance of the electrode. [ 34 ] From the above discussion, the enhanced‐compressively strained interface in N‐Pd/A‐Co(II) was successfully constructed.…”

Section: Synthesis and Structural Characterization Of N‐pd/a‐co(ii)mentioning

confidence: 99%

Compressive Strain in N‐Doped Palladium/Amorphous‐Cobalt (II) Interface Facilitates Alkaline Hydrogen Evolution

Geng

et al. 2021

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The development of palladium‐based catalysts for alkaline hydrogen evolution reaction (HER) is highly desired for renewable hydrogen energy systems, yet still challenging due to the strong palladium–hydrogen bond. Herein, the bottleneck is largely overcome by constructing a nitridation‐induced compressively strained‐interface N‐doped palladium/amorphous cobalt (II) interface (N‐Pd/A‐Co(II)), which dramatically boosts HER performance in alkaline condition. The optimized catalyst with the compressive strain of 2.7% exhibits the higher activity with an overpotential of only 58 mV to achieve the current density of 10 mA cm−2, much better than those of pure Pd (327 mV), and the state‐of‐art Pt/C (78 mV). Notably, it also shows excellent stability with negligible decline during a 30 h stability test. Detailed analyses reveal that the strong absorption of Hads on Pd can be efficiently reduced via the compressively strained N‐doped Pd. And the amorphous Co(II) component accelerates the water dissociation. Consequently, the cooperative effect between the compressed N‐doped Pd and amorphous Co(II) creates the impressive HER performance in alkaline condition, highlighting the importance of the functional interface to develop efficient electrocatalysts for HER and beyond.

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Section: Synthesis and Structural Characterization Of N‐pd/a‐co(ii)mentioning

confidence: 99%

Compressive Strain in N‐Doped Palladium/Amorphous‐Cobalt (II) Interface Facilitates Alkaline Hydrogen Evolution

Geng

et al. 2021

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“…The C 1s contribution located at 286.2 eV and the O 1s signal at 532.6 eV correspond to the C−O bonds in phenolic and/or ether groups [66,79] . Carboxyl/carbonyl groups can be correlated with the contribution located at 287.8 eV (C 1s signal) and 531.4 eV (O 1s signal) [80] . The contribution located at 533.8 eV of the O 1s signal can be assigned to C−O bonds in carboxylic anhydride groups.…”

Section: Resultsmentioning

confidence: 99%

“…[66,79] Carboxyl/carbonyl groups can be correlated with the contribution located at 287.8 eV (C 1s signal) and 531.4 eV (O 1s signal). [80] The contribution located at 533.8 eV of the O 1s signal can be assigned to CÀ O bonds in carboxylic anhydride groups. Additionally, the relative ratios (C 1s region, shown in parentheses) indicate the predominant existence of graphitic carbon on the surface of all samples.…”

Section: Characterization Of the Catalystsmentioning

confidence: 99%

Effect of Ni Metal Content on Emulsifying Properties of Ni/CNTox Catalysts for Catalytic Conversion of Furfural in Pickering Emulsions

et al. 2020

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Ni/CNTox catalysts with variable metal content have been prepared to investigate their emulsifying and catalytic properties for the liquid‐phase conversion of furfural. The solid catalysts and emulsions were analyzed by several characterization techniques. The catalytic activity linearly increased with increasing Ni content (up to 10 wt.%) before dropping down again for a Ni content of 15 wt.%. The loss of catalytic activity was attributed to larger emulsion droplets formed by the inhibition of hydrophilic sites. All Ni/CNTox catalysts were highly selective to cyclopentanone as a main product, while several changes regarding secondary products were observed. Ni/CNTox catalysts with a Ni content up to 10 wt.% favor the formation of levulinic acid, while catalysts with a Ni content of 15 wt.% were selective to tetrahydrofurfuryl alcohol. This was attributed to an inhibition of the acid sites thus favoring the catalyst's hydrogenation capacity.

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“…The small peak at 285.5 eV might be indexed to CS bonds due to the minor sulfur contamination in the tube furnace. [ 16 ] A small shoulder peak at 283.6 eV corresponds to the NiC bond resulting from the Ni 3 C formed during the CVD process. [ 17 ] The morphologies of the bare Ni foam and CNF@Ni were characterized by scanning electron microscopy (SEM).…”

Section: Resultsmentioning

confidence: 99%

Bifunctional 3D Hierarchical Hairy Foam toward Ultrastable Lithium/Sulfur Electrochemistry

Zeng

Chen

et al. 2020

Adv Funct Materials

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The dendrite formation resulting from the irregular lithium deposition and the infinite volume expansion in lithium anodes significantly impede their commercialization for high energy applications. Herein, it is demonstrated that carbon nanofibers (CNFs) grown in situ on a nickel foam (CNF@Ni) can locally change the Li stripping/plating behavior by reducing the nucleation overpotential and regulating the electric field distribution. The 3D conductive hairy foam with a hierarchical structure can provide sufficient active sites for lithium nucleation. In addition, the numerous CNFs with protuberant tips can act as the charge centers and significantly increase the electrochemically active surface area, resulting in the locally reduced and uniformly distributed current density. The symmetric cells using CNF@Ni-Li electrodes can achieve ultralong lifespan with low voltage hysteresis up to 1000 h. More remarkably, the CNF@Ni hairy foam can simultaneously enable reliable sulfur electrochemistry. The corresponding Li-S full cell shows excellent cycle stability with a high capacity of ≈400 mAh g −1 at 5 C after 800 cycles. This work provides an exemplary way to concurrently address the challenges in lithium and sulfur electrodes toward the development of high-performance Li-S batteries.

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Chemical vapor deposition growth of carbon nanotube confined nickel sulfides from porous electrospun carbon nanofibers and their superior lithium storage properties

Abstract: Carbon-nanotube confined nickel sulfides grown on porous carbon nanofibers were prepared via an electrospinning-CVD method and showed superior lithium storage performance.

Cited by 18 publications

References 40 publications

Compressive Strain in N‐Doped Palladium/Amorphous‐Cobalt (II) Interface Facilitates Alkaline Hydrogen Evolution

Compressive Strain in N‐Doped Palladium/Amorphous‐Cobalt (II) Interface Facilitates Alkaline Hydrogen Evolution

Effect of Ni Metal Content on Emulsifying Properties of Ni/CNTox Catalysts for Catalytic Conversion of Furfural in Pickering Emulsions

Bifunctional 3D Hierarchical Hairy Foam toward Ultrastable Lithium/Sulfur Electrochemistry

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