Tailoring the electronic structure of nanoelectrocatalysts induced by a surface-capping organic molecule for the oxygen reduction reaction
- Tailoring the electronic structure of nanoelectrocatalysts induced by a surface-capping organic molecule for the oxygen reduction reaction
- 정영훈; 정동영; 정남기; 성영은
- Energy Conversion and Storage; Energy and Charge Transport
- Issue Date
- Journal of Physical Chemistry Letters
- VOL 4, NO 8, 1304-1309
- Capping organic molecules, including oleylamine, strongly adsorbed onto Pt
nanoparticles during preparation steps are considered undesirable species for the oxygen
reduction reaction due to decreasing electrochemical active sites. However, we found that a
small amount of oleylamine modified platinum nanoparticles showed significant
enhancement of the electrochemical activity of the oxygen reduction reaction, even with
the loss of the electrochemically active surface area. The enhancement was correlated with
the downshift of the frontier d-band structure of platinum and the retardation of
competitively adsorbed species. These results suggest that a capping organic molecule
modified electrode can be a strategy to design an advanced electrocatalyst by modification
of electronic structures.
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