POROUS PLATINUM NANOSTRUCTURES VIA ETCHING OF INTERMETALLIC PLATINUM LEAD

Open Access
Author:
Bisbey, Ryan Patrick
Area of Honors:
Chemistry
Degree:
Bachelor of Science
Document Type:
Thesis
Thesis Supervisors:
  • Raymond Edward Schaak, Thesis Supervisor
  • Przemyslaw Maslak, Honors Advisor
  • Benjamin James Lear, Faculty Reader
Keywords:
  • porous platinum
  • nanostructures
  • catalysis
  • platinum lead
Abstract:
Herein we report a novel methodology for the synthesis of porous platinum nanostructures via the etching of intermetallic PtPb nanoparticles. For nanoparticles, three synthetic routes are presented and discussed. The first involves diffusion of lead into a platinum template particle and the later two involve co-deposition of platinum and lead using either ethylene glycol or tetra ethylene glycol. Although subsequent acid etching procedures are identical for all three procedures, the resulting porosity differs slightly in size and uniformity. While the first procedure yields randomly dense, mesopores that are about 2.5 nm in diameter, the later two yield smaller 1 to 2 nm micropores that are more uniformly distributed. PtPb nanowires and PtSn nanoparticles systems are also discussed; however, it could not be confirmed if porosity resulted in either system.