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

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 n...

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Bibliographic Details
Published in:Journal of power sources 2014-12, Vol.269, p.152-157
Main Authors: QIYU WANG, CUI, Xiaoqiang, WEIMING GUAN, LEI ZHANG, XIAOFENG FAN, ZHAN SHI, WEITAO ZHENG
Format: Article
Language:English
Subjects:
Catalysis
Catalysts: preparations and properties
Catalytic activity
Chemistry
Competition
Electrochemistry
Exact sciences and technology
General and physical chemistry
Miscellaneous (electroosmosis, electrophoresis, electrochromism, electrocrystallization, ...)
Nanocrystals
Nanostructure
Reduction
Silver
Simulation
Surface chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary: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.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2014.06.160