File Download

There are no files associated with this item.

  • Find it @ UNIST can give you direct access to the published full text of this article. (UNISTARs only)
Related Researcher

조재필

Cho, Jaephil
Nano Energy Storage Material Lab.
Read More

Views & Downloads

Detailed Information

Cited time in webofscience Cited time in scopus
Metadata Downloads

Influence of Surface Charges/Chemistry on the Catalysis of Perovskite Complexes

Author(s)
Park, SeungkyuNam, GyutaeLee, Jang-SooCho, JaephilJung, Jae-Il
Issued Date
2018-08
DOI
10.1021/acsami.8b04442
URI
https://scholarworks.unist.ac.kr/handle/201301/25003
Fulltext
https://pubs.acs.org/doi/10.1021/acsami.8b04442
Citation
ACS APPLIED MATERIALS & INTERFACES, v.10, no.34, pp.28502 - 28508
Abstract
The electrochemical performance of the perovskite complex was discovered to depend greatly on the different locations of the identical particle, which represent different surface charges accordingly. The surface charges were evaluated by Zeta potential (zeta) for the intrinsic BSCF5582 (Ba0.5Sr0.5Co0.8Fe0.2O3-delta), ball-milled (BM-BSCF5582), and heat-treated in an oxygen atmosphere after ball-milling (48h-O-2-BM-BSCF5582), the mean zeta of which represents -11.1, 21.2, and -6.1 mV, respectively, which reflects well on different surface chemistries. When the bonding structures at the different stratified layers and the overall crystalline morphologies were analyzed via X-ray photoelectron spectroscopy and high resolution transmission electron microscopy, respectively, the crystalline- and bonding-structure at the 50 nm depth of BSCF5582 is nearly identical to that of BM-BSCF5582 at the surface. As ball-milling proceeds, not only are particles comminuted but also the amorphous surface is broken open, leading to the revelation of inner and naive cubic crystalline phase surfaces and affecting the catalytic activities of oxygen evolution reactions and oxygen reduction reactions positively and negatively, respectively, at significant scales.
Publisher
AMER CHEMICAL SOC
ISSN
1944-8244
Keyword (Author)
perovskitessurface chargeball-millingoxygen reduction reactionoxygen evolution reaction
Keyword
METAL-AIR BATTERIESOXYGEN-REDUCTIONOXIDESELECTROCATALYSTGRAPHENEELECTRODESBSCFBA0.5SR0.5COXFE1-XO3-DELTATEMPERATUREPERFORMANCE

qrcode

Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.