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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

FESEM pattern for the obtained carbon nanofibers containing (A) Cu0%Co100% (B) Cu10%Co90% (C) Cu15%Co85% (D) Cu35%Co65% (E) Cu65%Co35% and (F) Cu100%Co0%, nanoparticles.
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f2: FESEM pattern for the obtained carbon nanofibers containing (A) Cu0%Co100% (B) Cu10%Co90% (C) Cu15%Co85% (D) Cu35%Co65% (E) Cu65%Co35% and (F) Cu100%Co0%, nanoparticles.

Mentions: Figure 1(B–D) shows the FESEM images of powder obtained from the electrospun mats containing 0.05 and 0.95 g CuAc and CoAc, respectively (Cu5%Co95%-CNFs). As shown, smooth and good morphology nanofibers were obtained. Moreover, the obtained nanofibers are decorated by nanoparticles which are expected to be Cu and/or Co metals. Figure 2 displays FE SEM images for nanofibers obtained from sol-gels having different CoAc/CuAc ratios, as shown almost all the powders demonstrate the nanofibrous morphology; however the best morphology was corresponding to CuAc content of 10 (Fig. 2B) and 15% (Fig. 2C).


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)

FESEM pattern for the obtained carbon nanofibers containing (A) Cu0%Co100% (B) Cu10%Co90% (C) Cu15%Co85% (D) Cu35%Co65% (E) Cu65%Co35% and (F) Cu100%Co0%, nanoparticles.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f2: FESEM pattern for the obtained carbon nanofibers containing (A) Cu0%Co100% (B) Cu10%Co90% (C) Cu15%Co85% (D) Cu35%Co65% (E) Cu65%Co35% and (F) Cu100%Co0%, nanoparticles.
Mentions: Figure 1(B–D) shows the FESEM images of powder obtained from the electrospun mats containing 0.05 and 0.95 g CuAc and CoAc, respectively (Cu5%Co95%-CNFs). As shown, smooth and good morphology nanofibers were obtained. Moreover, the obtained nanofibers are decorated by nanoparticles which are expected to be Cu and/or Co metals. Figure 2 displays FE SEM images for nanofibers obtained from sol-gels having different CoAc/CuAc ratios, as shown almost all the powders demonstrate the nanofibrous morphology; however the best morphology was corresponding to CuAc content of 10 (Fig. 2B) and 15% (Fig. 2C).

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