A rational design for enhanced oxygen reduction: strongly coupled silver nanoparticles and engineered perovskite nanofibers

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DOIResolve DOI: http://doi.org/10.1016/j.nanoen.2017.06.006
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TypeArticle
Journal titleNano Energy
ISSN2211-2855
Volume38
Pages392400
Subjectoxygen reduction; perovskite; mesoporous; Ag exsolution; ordered structure
AbstractFor perovskites to become more competitive oxygen reduction reaction (ORR) catalysts, substantial progress is required to advance their enhanced catalytic activity and durability. Herein, a novel method is described to achieve high-performance perovskite ORR catalyst via combining nano architecture designs, internal structures engineering, and Ag nanoparticles (NPs) in situ exsolution. The as-synthesized Ag-(PrBa)0.95Mn2O5+δ catalyst exhibits favorable ORR activity with durability superior to the state-of-the-art Pt/C in alkaline solution. Several characterization techniques were applied alongside density functional theory calculations to understand the possible active sites and the synergistic coupling effects that contributed to the high ORR performance. The strong interfacial anchoring of Ag NPs on the ordered oxygen deficient perovskites leads to significant ligand effect and facilitates electron transfer and ion migration within the oxygen reduction reaction. The systematic engineering of perovskites described here represents a brand new approach to developing highly active and stable catalyst for energy conversion and storage.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationNanotechnology; National Research Council Canada
Peer reviewedYes
NPARC number23002582
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Record identifier3511da75-1ed2-4c0d-bfc3-98429825f476
Record created2017-12-04
Record modified2017-12-04
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