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Influence of copper content on the electrocatalytic activity toward methanol oxidation of Co(χ)Cu(y) alloy nanoparticles-decorated CNFs.

Ghouri ZK, Barakat NA, Kim HY - Sci Rep (2015)

Bottom Line: The introduced electrocatalyst has been synthesized by simple and effective process; electrospinning.The nanofibrous morphology and alloy structure have been confirmed by SEM, TEM and XRD analyses.Overall, the introduced study revealed the veil about the distinct role of copper in enhancing the electrocatalytic activity of cobalt-based materials.

View Article: PubMed Central - PubMed

Affiliation: Advanced Materials Institute for BIN Convergence, Department of BIN Convergence Technology, Chonbuk National University, Jeonju 561-756, Republic of Korea.

ABSTRACT
In this study, CoCu alloy nanoparticles-incorporated carbon nanofibers are introduced as effective non precious electrocatalyst for methanol oxidation in alkaline medium. The introduced electrocatalyst has been synthesized by simple and effective process; electrospinning. Typically, calcination, in nitrogen atmosphere, of electrospun nanofibers composed of cobalt acetate, copper acetate and poly (vinyl alcohol) leads to form carbon nanofibers decorated by CoCu nanoparticles. The nanofibrous morphology and alloy structure have been confirmed by SEM, TEM and XRD analyses. Investigation of the electrocatalytic activity indicates that copper content has strong influence, the alloy nanoparticles having the composition Cu5%Co95% showed distinct high performance; 100 times higher than other formulations. Overall, the introduced study revealed the veil about the distinct role of copper in enhancing the electrocatalytic activity of cobalt-based materials.

No MeSH data available.


Related in: MedlinePlus

Cyclic voltammograms of the carbon nanofibers containing (A) Cu0%Co100% (B) Cu35%Co65% (C) Cu65%Co35%, and (D) Cu100%Co0% nanoparticles. Scan rate 100 mV/s, 1 M KOH.
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f6: Cyclic voltammograms of the carbon nanofibers containing (A) Cu0%Co100% (B) Cu35%Co65% (C) Cu65%Co35%, and (D) Cu100%Co0% nanoparticles. Scan rate 100 mV/s, 1 M KOH.

Mentions: The distinctly big difference in the activity observed in Fig. 5(F), might be understood from the activation behaviors on the investigated formulations. Figure 6 displays the sweep cyclic voltogramms in presence of 1 M KOH for 50 cycles at scan rate 100 mV/s. Compared the best formulation (Fig. 4A), one cannot find characteristic redox peaks in the investigated formulations. Figure 7(A), displays comparison between the investigated alloys compositions compared to the best formulation, as shown the redox peaks in the optimum composition are clearly seen while almost no peaks could be found in the other prepared modified CNFs.


Influence of copper content on the electrocatalytic activity toward methanol oxidation of Co(χ)Cu(y) alloy nanoparticles-decorated CNFs.

Ghouri ZK, Barakat NA, Kim HY - Sci Rep (2015)

Cyclic voltammograms of the carbon nanofibers containing (A) Cu0%Co100% (B) Cu35%Co65% (C) Cu65%Co35%, and (D) Cu100%Co0% nanoparticles. Scan rate 100 mV/s, 1 M KOH.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4645225&req=5

f6: Cyclic voltammograms of the carbon nanofibers containing (A) Cu0%Co100% (B) Cu35%Co65% (C) Cu65%Co35%, and (D) Cu100%Co0% nanoparticles. Scan rate 100 mV/s, 1 M KOH.
Mentions: The distinctly big difference in the activity observed in Fig. 5(F), might be understood from the activation behaviors on the investigated formulations. Figure 6 displays the sweep cyclic voltogramms in presence of 1 M KOH for 50 cycles at scan rate 100 mV/s. Compared the best formulation (Fig. 4A), one cannot find characteristic redox peaks in the investigated formulations. Figure 7(A), displays comparison between the investigated alloys compositions compared to the best formulation, as shown the redox peaks in the optimum composition are clearly seen while almost no peaks could be found in the other prepared modified CNFs.

Bottom Line: The introduced electrocatalyst has been synthesized by simple and effective process; electrospinning.The nanofibrous morphology and alloy structure have been confirmed by SEM, TEM and XRD analyses.Overall, the introduced study revealed the veil about the distinct role of copper in enhancing the electrocatalytic activity of cobalt-based materials.

View Article: PubMed Central - PubMed

Affiliation: Advanced Materials Institute for BIN Convergence, Department of BIN Convergence Technology, Chonbuk National University, Jeonju 561-756, Republic of Korea.

ABSTRACT
In this study, CoCu alloy nanoparticles-incorporated carbon nanofibers are introduced as effective non precious electrocatalyst for methanol oxidation in alkaline medium. The introduced electrocatalyst has been synthesized by simple and effective process; electrospinning. Typically, calcination, in nitrogen atmosphere, of electrospun nanofibers composed of cobalt acetate, copper acetate and poly (vinyl alcohol) leads to form carbon nanofibers decorated by CoCu nanoparticles. The nanofibrous morphology and alloy structure have been confirmed by SEM, TEM and XRD analyses. Investigation of the electrocatalytic activity indicates that copper content has strong influence, the alloy nanoparticles having the composition Cu5%Co95% showed distinct high performance; 100 times higher than other formulations. Overall, the introduced study revealed the veil about the distinct role of copper in enhancing the electrocatalytic activity of cobalt-based materials.

No MeSH data available.


Related in: MedlinePlus