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@ARTICLE{Thursfield:32018,
author = {Thursfield, A. and Brosda, S. and Pliangos, C. and Schober,
T. and Vayenas, C.},
title = {{E}lectrochemical promotion of an oxidation reaction using
a proton conductor},
journal = {Electrochimica acta},
volume = {48},
issn = {0013-4686},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {PreJuSER-32018},
pages = {3779 - 3788},
year = {2003},
note = {Record converted from VDB: 12.11.2012},
abstract = {A proton conductor, Ba3Ca1.18Nb1.82O9-alpha, has been used
to electrochemically promote, via potential-controlled
spillover of protons, a Pt catalyst-electrode for the model
reaction of ethene oxidation at temperature 250-350
degreesC. The rate enhancement is up to 12 times that of the
open-circuit rate and typically 10(3) times larger than the
rate of proton supply to the catalyst. At the highest
temperatures and most oxidizing conditions employed an up to
threefold permanent electrochemical enhancement in catalytic
rate was also observed. In situ a.c. impedance spectra
reveal a buildup of sacrificial promoter, most likely OH
formed by reaction of spillover protons with chemisorbed
oxygen, under electrochemical promotion conditions. The
observed pronounced electrophilic (partial
derivativer/partial derivativeU less than or equal to 0)
behavior, in conjunction with the reaction kinetics, is in
good agreement with the recently established rules of
electrochemical and classical promotion. (C) 2003 Elsevier
Ltd. All rights reserved.},
keywords = {J (WoSType)},
cin = {IFF-EKM},
ddc = {540},
cid = {I:(DE-Juel1)VDB35},
pnm = {Kondensierte Materie},
pid = {G:(DE-Juel1)FUEK242},
shelfmark = {Electrochemistry},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000186221100008},
doi = {10.1016/S0013-4686(03)00511-5},
url = {https://juser.fz-juelich.de/record/32018},
}