| Full text | |
| Author(s): |
Bae, Je Hyun
[1]
;
Brocenschi, Ricardo F.
[1]
;
Kisslinger, Kim
[2]
;
Xin, Huolin L.
[2]
;
Mirkin, Michael V.
[3, 1]
Total Authors: 5
|
| Affiliation: | [1] CUNY Queens Coll, Dept Chem & Biochem, Flushing, NY 11367 - USA
[2] Brookhaven Natl Lab, Ctr Funct Nanomat, Upton, NY 11973 - USA
[3] CUNY, Grad Ctr, New York, NY 10016 - USA
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Analytical Chemistry; v. 89, n. 23, p. 12618-12621, DEC 5 2017. |
| Web of Science Citations: | 7 |
| Abstract | |
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 nm sized Pt particles on the glass surface surrounding the electrode. 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). (AU) | |
| FAPESP's process: | 16/03347-0 - Use of scanning electrochemical microscopy to investigate the effect of electrochemical treatments on the activity of boron-doped diamond electrodes towards different redox species |
| Grantee: | Ricardo Francisco Brocenschi |
| Support Opportunities: | Scholarships abroad - Research Internship - Post-doctor |