Pulsed electrodeposition of Pt nanoclusters on carbon nanotubes modified carbon materials using diffusion restricting viscous electrolytes

Chen, Xingxing; Li, Nan; Eckhard, Kathrin; Stoica, Leonard; Xia, Wei; Aßmann, J.; Mühler, Martin; Schuhmann, Wolfgang

doi:10.1016/j.elecom.2007.01.034

Cited by 86 publications

(63 citation statements)

References 36 publications

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“…3, the electrodes formed by pulse current mode consist of more than 70% of cubes and the rest of other shapes. [18][19][20] However, in our study, as applied current density is increased, an average size of cubes is reduced, that is, 375, 335, 195, and 163 nm at −1, −2, −3, and −4 mA/cm 2 , respectively. Moreover, the electrode prepared by pulse electrodeposition at −1, −2, −3, and −4 mA/cm 2 displays size deviation of ±30.82, 59.91, 18.82, and 12.94, respectively.…”

Section: Resultsmentioning

confidence: 86%

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Size-Controlled Cu₂O Nanocubes by Pulse Electrodeposition

Song¹,

Han²,

Lee³

et al. 2010

Journal of the Korean Electrochemical Society

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: In this work, highly uniform size-controlled Cu 2 O nanocubes can be successfully formed by means of pulse electrodeposition. The size distribution, crystal structure, and chemical state of deposited Cu 2 O nanocubes are characterized using scanning electron microscopy, transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The phase transition from Cu 2 O to Cu can be controlled by constant current electrodeposition as a function of deposition time. In particular, the size of the Cu 2 O nanocubes can be controlled using pulse electrodeposition as a function of applied current density.

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Section: Resultsmentioning

confidence: 86%

“…[10][11][12][13][14][15][16][17] Among them, pulse electrodeposition method was found to be useful for nanostructure fabrication because of simple operation and uniform deposition. [18][19][20] However, since it is stable in an extremely narrow range, the Cu 2 O phase should be carefully fabricated.…”

Section: Introductionmentioning

confidence: 99%

Size-Controlled Cu₂O Nanocubes by Pulse Electrodeposition

Song¹,

Han²,

Lee³

et al. 2010

Journal of the Korean Electrochemical Society

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“…[9][10][11][12][13] Electrochemical reduction, the operationally simple electrolysis of an aqueous solution containing precursors of Pt(II) or Pt(IV), is regarded as a more straightforward, convenient, and eco-friendly process than chemical reduction; although Pt nanoparticle fabrication by electrochemical synthetic methods has many advantages, a number of drawbacks exist. During the electroreduction process, only a fraction of dissolved Pt ions are reduced at the substrate surface, and the precursor remaining in solution is discarded; consequently, current electrochemical techniques for Pt nanoparticle synthesis in the solution phase are undesirable from an environmental standpoint, and are inefficient in terms of obtained conversion ratios of Pt ions to Pt nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Green Synthesis of Platinum Nanoparticles by Electroreduction of a K₂PtCl₆Solid-State Precursor and Its Electrocatalytic Effects on H₂O₂Reduction

Kim¹,

Jin²,

Chang³

et al. 2013

Bulletin of the Korean Chemical Society

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A new synthesis route for Pt nanoparticles by direct electrochemical reduction of a solid-state Pt ion precursor (K 2 PtCl 6 ) is demonstrated. Solid K 2 PtCl 6 -supported polyethyleneimine (PEI) coatings on the surface of glassy carbon electrode were prepared by simple mixing of solid K 2 PtCl 6 into a 1.0% PEI solution. The potential cycling or a constant potential in a PBS (pH 7.4) medium were applied to reduce the solid K 2 PtCl 6 precursor. The reduction of Pt(IV) began at around −0.2 V and the reduction potential was ca. −0.4 V. A steady state current was achieved after 10 potential cycling scans, indicating that continuous formation of Pt nanoparticles by electrochemical reduction occurred for up to 10 cycles. After applying the reduction potential of −0.6 V for 300 s, Pt nanoparticles with diameters ranging from 0.02-0.5 µm were observed, with an even distribution over the entire glassy carbon electrode surface. Characteristics of the Pt nanoparticles, including their performance in electrochemical reduction of H 2 O 2 are examined. A distinct reduction peak observed at about −0.20 V was due to the electrocatalytic reduction of H 2 O 2 by Pt nanoparticles. From the calibration plot, the linear range for H 2 O 2 detection was 0.1-2.0 mM and the detection limit for H 2 O 2 was found to be 0.05 mM.

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“…[5] Moreover, they can promote electron transfer reactions and they exhibit an inherent electrocatalytic activity towards for example, the oxygen reduction reaction (ORR). [5][6][7][8] Their catalytic activity for O 2 reduction can be enhanced even further by incorporation of nitrogen at the CNT surface. [9][10][11][12][13] Therefore, CNTs are considered to be promising materials for oxygen depolarized cathodes in fuel cells, for example.…”

mentioning

confidence: 99%

“…As previously shown, the increased viscosity of the deposition solution leads to a reduced diffusion coefficient of the Pt ions and hence to smaller Pt nanoclusters. [8] For the investigation of the ORR activity, a sample with two similar CNT spots on GC was chosen. Both spots were obtained after PED of Fe particles in ten reduction pulse (compare Figure 3 f).…”

mentioning

confidence: 99%