Presentation Title: Synthesis of Palladium-Tungsten Nanoparticles for Fuel Cell Electrocatalysis Discipline: Chemical Sciences & Engineering School: Argonne National Laboratory - Harry S. Truman College Presentation Type: Oral Presentation Abstract: Synthesis of Palladium-Tungsten Nanoparticles for Fuel Cell Electrocatalysis Jordan Gurneau, Argonne National Laboratory - Harry S. Truman College
Oxygen Reduction Reaction (ORR) at the cathode electrode is one of the most important reactions in polymer electrolyte membrane fuel cells (PEMFCs). Platinum (Pt) and platinum alloys are the most studied electrocatalysts with high ORR catalytic activity and stability. However, the cost of platinum is very high and also the natural reserves are limited. Therefore, many efforts have focused on the development of less expensive alternatives to platinum with comparable or enhanced oxygen reduction reaction (ORR) catalytic activity. One approach is to replace platinum with other catalytically-active noble metals and to alloy the noble metals with base metals to both enhance their activity, through modification of their electronic structure, and to reduce the overall catalyst cost. Palladium (Pd) alloyed with base metals such as tungsten (W) have been predicted, through theoretical calculations, to modify the electronic structure of palladium leading to enhancement of oxygen reduction reaction (ORR) activity and catalyst stability. Colloidal preparation methods that utilize organic capping agents offer an attractive approach to prepare catalyst nanoparticles with controlled particle size and shape and or morphology. Palladium acetate (Pd(OAc)2) and tungsten-hexacarbonyl (W(CO)6) were the metal precursors, oleylamine and oleic acid were the capping agents, and ortho-xylene was the solvent. Formation of Pd-W o alloy particles was achieved at relatively low temperatures highest at 135 C. The resulting alloy particles were supported on carbon black using simple solution mixing and solvent removal, followed by heat treatment to remove the organic capping and activate the catalyst particles for fuel cell reactions.
Presenter: Jordan Gurneau Tribe: St. Croix Chippewa Primary Email: firstname.lastname@example.org Biography Jordan Gurneau is a 21 yr old Ojibwe enrolled in the St. Croix Chippewas of Wisconsin and is also a descendant of the Red Lake Band of Chippewa Indians. He is a student at Harry S. Truman College studying Mechanical Engineering, Jordan plans to pursue a PhD. Being born and raised in Chicago, Jordan is part of the urban Native American community. He finished his second year at an internship at Argonne National Laboratory in the Fuel Cells group, his work from the previous year is being continued in the second year of research.
Published on Oct 20, 2011
Published on Oct 20, 2011
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