Nickel particles supported on multi-walled carbon nanotubes modified sponge for sodium borohydride electrooxidation

Zhang, Dongming; Cheng, Kui; Shi, Nannan; Guo, Fen; Wang, Guiling

doi:10.1016/j.elecom.2013.08.015

Cited by 41 publications

(34 citation statements)

References 21 publications

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“…Figure 2e shows the TEM image of the Ni particles. The Ni particles present a rough edge with many burrs, which increase the specific areas and may lead a high surface energy [36][37]. Some Ni nano-balls (the diameter is around 50 nm) are clearly seen in the visual field, which is coincident with the SEM image (Fig.…”

Section: Methodsmentioning

confidence: 83%

“…Interestingly, it can be seen that the big Ni particles are consisted of small Ni nanoballs and the phenomenon is caused by the strong magnetism of metallic Ni. Besides, there are many gaps among the Ni particles instead of a film, which may be caused by the hydrogen released during the electrodeposition process [28,36]. The reaction solution will diffuse to the inner of the electrode through the gaps and may be adsorbed by the sponge, both of which will increase the catalytic performance.…”

Section: Methodsmentioning

confidence: 98%

“…04-0850). So, the XRD results demonstrate that metallic nickel was electrodeposited on the MS substrate [36]. Figure 4 shows the cyclic voltammograms (CVs) of the MS substrate and MSNi electrode in 4 mol dm −3 NaOH at a scan rate of 50 mV s −1 .…”

Section: Methodsmentioning

confidence: 98%

“…In order to make sponge conductive, Cui et al [35] modified sponge by CNTs and fabricated MnO 2 hybrid electrodes for supercapacitors and achieved high performance. Very recently, our team reported Ni-modified sponge electrodes [36] for the electrooxidation of NaBH 4 and obtained a high electrocatalytic activity and superior stability due to their especial 3D structure and high specific area.…”

Section: Introductionmentioning

confidence: 98%

“…will always be not utilized fully caused by the onedimensional (1D) plane structure. Recently, the electrodes with three-dimensional (3D) structures have caught researchers' attention due to their excellent mass transport property, high catalyst utilization and capability of achieving large catalytic surface areas [16,[25][26][27][28][29][30][31][32][33][34][35][36]. 3D nano-array [16,[26][27] based active material is one of the hot topics that are employed as the electrode materials.…”

Section: Introductionmentioning

confidence: 99%

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Methanol electrooxidation on flexible multi-walled carbon nanotube-modified sponge-based nickel electrode

Cheng

Zhang

et al. 2015

J Solid State Electrochem

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Flexible and binder-free multi-walled carbon nanotube (MWNT)-modified sponge-based nickel (Ni) is employed as the electrode material for methanol (CH 3 OH) electrooxidation. The nano-spherical Ni is electrodeposited on the surface of the MWNTs which are assembled on the skeleton of a commercial sponge. The as-prepared MWNTmodified sponge-based Ni electrode (MSNi) is characterized by scanning electron microscopy, transmission electron microscope, and X-ray diffractometer. The catalytic activity of the MSNi electrode for CH 3 OH electrooxidation is investigated by means of cyclic voltammetry, chronoamperometry, and electrochemical impedance spectra. The preparation process of the flexible MSNi electrode does not use any binder and it exhibits a unique three-dimensional (3D) network-porous structure. The MSNi exhibits a high electrocatalytic performance of 23 mA (cm 2 mg −1 ) in 0.5 mol dm −3 CH 3 OH at 0.5 V.

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Section: Methodsmentioning

confidence: 83%

Section: Methodsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Methanol electrooxidation on flexible multi-walled carbon nanotube-modified sponge-based nickel electrode

Cheng

Zhang

et al. 2015

J Solid State Electrochem

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Metal and Metal Oxide Nanosponges

Dhakar

2019

Nanosponges

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Nickel 3D Structures Enhanced by Electrodeposition of Nickel Nanoparticles as High Performance Anodes for Direct Borohydride Fuel Cells

et al. 2020

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Direct borohydride fuel cell (DBFC) is a promising technology to power portable and mobile devices thanks to their high theoretical voltage and good energy density. Carbon-supported electrodeposited nickel-metal catalysts (Ni ED /C) exhibit fast kinetics for the borohydride oxidation reaction (BOR). One key is to deposit nickel-metal on sufficiently open structures to make electrodes compatible with fast mass-transfer, so as to further optimize the fuel cell performance. To that goal, Ni foams (NFM) or felts (NFT) can be used. Being inherently surface-oxidized (passivated) and of too low developed area, these supports were enhanced by both oxides removal/ depassivation (using electro-assisted (or not) acid etching) and nickel electrodeposition, in order to exhibit the combined properties of fast diffusion medium and high-surface area resulting in the highly-active catalysts. After such enhancement, Ni ED /NFT shows superior performance in the BOR compared to carbon-supported Ni catalysts. To make a fair comparison with PGM, Pt catalysts supported on open carbon structures were also studied and presented slightly smaller performance than the Ni ED /NFT electrodes, in particular in terms of open-circuit potential and current density at high cell voltage.[a] G. Braesch, Prof. M. Chatenet

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Nickel particles supported on multi-walled carbon nanotubes modified sponge for sodium borohydride electrooxidation

Cited by 41 publications

References 21 publications

Methanol electrooxidation on flexible multi-walled carbon nanotube-modified sponge-based nickel electrode

Methanol electrooxidation on flexible multi-walled carbon nanotube-modified sponge-based nickel electrode

Metal and Metal Oxide Nanosponges

Nickel 3D Structures Enhanced by Electrodeposition of Nickel Nanoparticles as High Performance Anodes for Direct Borohydride Fuel Cells

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