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@ARTICLE{Bhm:866000,
author = {Böhm, Daniel and Beetz, Michael and Schuster, Maximilian
and Peters, Kristina and Hufnagel, Alexander G. and
Döblinger, Markus and Böller, Bernhard and Bein, Thomas
and Fattakhova‐Rohlfing, Dina},
title = {{E}fficient {OER} {C}atalyst with {L}ow {I}r {V}olume
{D}ensity {O}btained by {H}omogeneous {D}eposition of
{I}ridium {O}xide {N}anoparticles on {M}acroporous
{A}ntimony‐{D}oped {T}in {O}xide {S}upport},
journal = {Advanced functional materials},
volume = {30},
number = {1},
issn = {1616-3028},
address = {Weinheim},
publisher = {Wiley-VCH},
reportid = {FZJ-2019-05260},
pages = {1906670 -},
year = {2019},
abstract = {A multistep synthesis procedure for the homogeneous coating
of a complex porous conductive oxide with small Ir
nanoparticles is introduced to obtain a highly active
electrocatalyst for water oxidation. At first, inverse opal
macroporous Sb doped SnO2 (ATO) microparticles with defined
pore size, composition, and open‐porous morphology are
synthesized that reach a conductivity of ≈3.6 S
cm$^{−1}$ and are further used as catalyst support.
ATO‐supported iridium catalysts with a controlled amount
of active material are prepared by solvothermal reduction of
an IrO$_x$ colloid in the presence of the porous ATO
particles, whereby homogeneous coating of the complete outer
and inner surface of the particles with nanodispersed
metallic Ir is achieved. Thermal oxidation leads to the
formation of ATO‐supported IrO$_2$ nanoparticles with a
void volume fraction of ≈89\% calculated for catalyst thin
films based on scanning transmission electron microscope
tomography data and microparticle size distribution. A
remarkably low Ir bulk density of ≈0.08 g cm$^{−3}$ for
this supported oxide catalyst architecture with 25 wt\% Ir
is determined. This highly efficient oxygen evolution
reaction catalyst reaches a current density of 63 A
g$_{Ir}$$^{−1}$ at an overpotential of 300 mV versus
reversible hydrogen electrode, significantly exceeding a
commercial TiO$_2$‐supported IrO$_2$ reference catalyst
under the same measurement conditions.},
cin = {IEK-1},
ddc = {530},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {131 - Electrochemical Storage (POF3-131)},
pid = {G:(DE-HGF)POF3-131},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000492384200001},
doi = {10.1002/adfm.201906670},
url = {https://juser.fz-juelich.de/record/866000},
}