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This content will become publicly available on November 15, 2018

Title: Dissolution of Pt during Oxygen Reduction Reaction Produces Pt Nanoparticles

The loss of Pt during the oxygen reduction reaction (ORR) affects the performance and economic viability of fuel cells and sensors. Our group previously observed the dissolution of Pt nanoelectrodes at moderately negative potentials during the ORR. Here we report a more detailed study of this process and identify its product. The nanoporous Pt surface formed during the ORR was visualized by AFM and high-resolution SEM, which also showed ~5 nm sized Pt particles on the glass surface surrounding the electrode. Furthermore, the release of these nanoparticles into the solution was confirmed by monitoring their catalytically amplified collisions with a Hg-coated microelectrode used as the tip in the scanning electrochemical microscope (SECM).
 [1] ;  [1] ;  [2] ;  [2] ; ORCiD logo [3]
  1. Queens College-CUNY, Flushing, NY (United States)
  2. Brookhaven National Lab. (BNL), Upton, NY (United States)
  3. Queens College-CUNY, Flushing, NY (United States); CUNY, New York, NY (United States)
Publication Date:
Report Number(s):
Journal ID: ISSN 0003-2700; R&D Project: 16060; 16060; KC0403020; TRN: US1702964
Grant/Contract Number:
Accepted Manuscript
Journal Name:
Analytical Chemistry
Additional Journal Information:
Journal Volume: 89; Journal Issue: 23; Journal ID: ISSN 0003-2700
American Chemical Society (ACS)
Research Org:
Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
36 MATERIALS SCIENCE; Oxygen Reduction Reaction; Center for Functional Nanomaterials
OSTI Identifier: