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- Kwak, Sang Kyu
- Kyu’s MolSim Lab @ UNIST
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Curvature-Induced Metal-Support Interaction of an Islands-by-Islands Composite of Platinum Catalyst and Carbon Nano-onion for Durable Oxygen Reduction
- Author(s)
- Yang, Juchan, Kim, Su Hwan, Kwak, Sang Kyu, Song, Hyun-Kon
- Issued Date
- 2017-07
- Citation
- ACS APPLIED MATERIALS & INTERFACES, v.9, no.28, pp.23302 - 23308
- Abstract
- Geometry of carbon supports significantly affected electrochemical durability of Pt/C (platinum electrocatalyst supported by carbon) for oxygen reduction reaction (ORR). Carbon nano-onion (CNO) was used as the support, which is characterized by its nanosize (similar to Pt size) and high curvature. Superior ORR durability was guaranteed by Pt/CNO due to (1) its islands-by-islands configuration to isolate each Pt nanoparticle from its neighbors by CNO particles; (2) highly tortuous void structure of the configuration to suppress Ostwald ripening; and (3) the curvature-induced strong interaction between CNO and Pt. The finding that highly curved carbon surface encourages electron donation to catalysts was first reported.
- Publisher
- AMER CHEMICAL SOC
- ISSN
- 1944-8244
- Keyword (Author)
- carbon nano-onion, curved structure, electrocatalyst, islands-by-islands composite, oxygen reduction
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