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Assembly of a Cost-Effective Anode Using Palladium Nanoparticles for Alkaline Fuel Cell Applications.

Feliciano-Ramos I, Casañas-Montes B, García-Maldonado MM, Menéndez CL, Mayol AR, Díaz-Vázquez LM, Cabrera CR - J Chem Educ (2015)

Bottom Line: In this laboratory experiment, the student selects a cost-effective anode for fuel cells by comparing three different working electrodes.The GC and CP were modified with palladium nanoparticles (PdNP) suspensions.With this activity, fundamental electrochemical concepts were reinforced.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry and Center for Advanced Nanoscale Materials, University of Puerto Rico , Río Piedras Campus, P.O. Box 23346, San Juan, Puerto Rico 00931-3346, United States.

ABSTRACT

Nanotechnology allows the synthesis of nanoscale catalysts, which offer an efficient alternative for fuel cell applications. In this laboratory experiment, the student selects a cost-effective anode for fuel cells by comparing three different working electrodes. These are commercially available palladium (Pd) and glassy carbon (GC) electrodes, and a carbon paste (CP) electrode that is prepared by the students in the laboratory. The GC and CP were modified with palladium nanoparticles (PdNP) suspensions. The electrodes efficiencies were studied for ethanol oxidation in alkaline solution using cyclic voltammetry techniques. The ethanol oxidation currents obtained were used to determine the current density using the geometric and surface area of each electrode. Finally, students were able to choose the best electrode and relate catalytic activity to surface area for ethanol oxidation in alkaline solution by completing a critical analysis of the cyclic voltammetry results. With this activity, fundamental electrochemical concepts were reinforced.

No MeSH data available.


Cyclic voltammogram of GC electrode modified with PdNP(solid line)and bare GC electrode (dash line) in 0.10 M H2SO4 solution.
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fig2: Cyclic voltammogram of GC electrode modified with PdNP(solid line)and bare GC electrode (dash line) in 0.10 M H2SO4 solution.

Mentions: In Part II, anintroduction to CV technique was given to students.Then, the presence of PdNP on the GC and CP electrodes was confirmedusing the CV technique in 0.10 M H2SO4 solutionand a potentiostat. Figure 2 shows the cyclicvoltammograms for bare GC and GC modified with PdNP in 0.10 M H2SO4 solution. The bare GC electrode did not showoxidation and reduction peaks. However, GC modified with PdNP showedcurrent peaks corresponding to the palladium oxide (PdO) formationat positive potential and PdO reduction at negative potential.11,12 The students were guided to make a detailed interpretation of eachcyclic voltammogram, explaining the characteristic peaks and its correspondingredox reaction.


Assembly of a Cost-Effective Anode Using Palladium Nanoparticles for Alkaline Fuel Cell Applications.

Feliciano-Ramos I, Casañas-Montes B, García-Maldonado MM, Menéndez CL, Mayol AR, Díaz-Vázquez LM, Cabrera CR - J Chem Educ (2015)

Cyclic voltammogram of GC electrode modified with PdNP(solid line)and bare GC electrode (dash line) in 0.10 M H2SO4 solution.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4325606&req=5

fig2: Cyclic voltammogram of GC electrode modified with PdNP(solid line)and bare GC electrode (dash line) in 0.10 M H2SO4 solution.
Mentions: In Part II, anintroduction to CV technique was given to students.Then, the presence of PdNP on the GC and CP electrodes was confirmedusing the CV technique in 0.10 M H2SO4 solutionand a potentiostat. Figure 2 shows the cyclicvoltammograms for bare GC and GC modified with PdNP in 0.10 M H2SO4 solution. The bare GC electrode did not showoxidation and reduction peaks. However, GC modified with PdNP showedcurrent peaks corresponding to the palladium oxide (PdO) formationat positive potential and PdO reduction at negative potential.11,12 The students were guided to make a detailed interpretation of eachcyclic voltammogram, explaining the characteristic peaks and its correspondingredox reaction.

Bottom Line: In this laboratory experiment, the student selects a cost-effective anode for fuel cells by comparing three different working electrodes.The GC and CP were modified with palladium nanoparticles (PdNP) suspensions.With this activity, fundamental electrochemical concepts were reinforced.

View Article: PubMed Central - PubMed

Affiliation: Department of Chemistry and Center for Advanced Nanoscale Materials, University of Puerto Rico , Río Piedras Campus, P.O. Box 23346, San Juan, Puerto Rico 00931-3346, United States.

ABSTRACT

Nanotechnology allows the synthesis of nanoscale catalysts, which offer an efficient alternative for fuel cell applications. In this laboratory experiment, the student selects a cost-effective anode for fuel cells by comparing three different working electrodes. These are commercially available palladium (Pd) and glassy carbon (GC) electrodes, and a carbon paste (CP) electrode that is prepared by the students in the laboratory. The GC and CP were modified with palladium nanoparticles (PdNP) suspensions. The electrodes efficiencies were studied for ethanol oxidation in alkaline solution using cyclic voltammetry techniques. The ethanol oxidation currents obtained were used to determine the current density using the geometric and surface area of each electrode. Finally, students were able to choose the best electrode and relate catalytic activity to surface area for ethanol oxidation in alkaline solution by completing a critical analysis of the cyclic voltammetry results. With this activity, fundamental electrochemical concepts were reinforced.

No MeSH data available.