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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.


Schematic of an alkalinefuel cell.
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fig1: Schematic of an alkalinefuel cell.

Mentions: Researchershave been workingon developing cleaner energy sources that can replace oil and reducegreenhouse gas emissions such as fuel cells.1,2 Theseelectrochemical devices transform chemical energy to electricity usinga fuel and oxygen.3,4 These devices consist of two electrodes,an anode and a cathode, and a polymer electrolyte membrane. At theanode, an oxidation reaction takes place in which the electrons areremoved from the fuel. Then, the electrons move to the cathode throughan external circuit where a reduction reaction occurs. In alkalinefuel cells, negative ions migrate through the membrane toward theanode to form water, energy and other byproducts depending on thefuel. In the general process, a redox reaction takes place to produceelectrical energy (see Figure 1).


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)

Schematic of an alkalinefuel cell.
© Copyright Policy
Related In: Results  -  Collection

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

fig1: Schematic of an alkalinefuel cell.
Mentions: Researchershave been workingon developing cleaner energy sources that can replace oil and reducegreenhouse gas emissions such as fuel cells.1,2 Theseelectrochemical devices transform chemical energy to electricity usinga fuel and oxygen.3,4 These devices consist of two electrodes,an anode and a cathode, and a polymer electrolyte membrane. At theanode, an oxidation reaction takes place in which the electrons areremoved from the fuel. Then, the electrons move to the cathode throughan external circuit where a reduction reaction occurs. In alkalinefuel cells, negative ions migrate through the membrane toward theanode to form water, energy and other byproducts depending on thefuel. In the general process, a redox reaction takes place to produceelectrical energy (see Figure 1).

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.