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Fuel Cells: Electronic Activation of Cathode Superlattices at Elevated Temperatures – Source of Markedly Accelerated Oxygen Reduction Kinetics (Adv. Energy Mater. 9/2013)
Author(s) -
Chen Yan,
Cai Zhuhua,
Kuru Yener,
Ma Wen,
Tuller Harry L.,
Yildiz Bilge
Publication year - 2013
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201370036
Subject(s) - materials science , oxide , cathode , superlattice , oxygen , nanometre , scanning tunneling microscope , nanotechnology , optoelectronics , chemical engineering , composite material , chemistry , organic chemistry , engineering , metallurgy
A novel combination of scanning tunneling microscopy and focus ion beam milling is developed to probe the local electronic structure near the hetero‐interfaces of oxide superlattices with nanometer‐scale resolution at elevated temperatures and in oxygen gas environment. On page 1221 , Bilge Yildiz and co‐workers use this method to reveal the mechanism behind the very high reactivity of the interface between (La,Sr)CoO 3 and LaSrCoO 4 layers to oxygen reduction at high temperature. The results advance the understanding of oxide hetero‐interfaces at elevated temperatures and identify electronically coupled oxide structures as novel cathodes with exceptional performance for application in solid oxide fuel cells.