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Shape-dependent catalytic activity of oxygen reduction reaction (ORR) on silver nanodecahedra and nanocubes

Authors
Journal
Journal of Power Sources
0378-7753
Publisher
Elsevier
Publication Date
Volume
269
Identifiers
DOI: 10.1016/j.jpowsour.2014.06.160
Keywords
  • Silver
  • Nanodecahedra
  • Nanocubes
  • Oxygen Reduction Reaction
  • Electrocatalysis
Disciplines
  • Design

Abstract

Abstract The structure effects on the oxygen reduction reaction (ORR) are studied on similar sized silver nanodecahedra and nanocubes which are enclosed by (111) and (100) facets, respectively. The results show that the oxygen reduction proceeds one-step “direct” four-electron reduction on silver nanodecahedra, while two-step processes on silver nanocubes. The simulations results suggest that the different ORR catalytic activity can be interpretated by the adsorption competition between oxygen and hydroxyl on different silver facets. We demonstrate that the surface facet of silver nanocrystals is a decisive parameter to designing catalysts for ORR and other electrocatalytic reaction.

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