ACS Catalysis,
Journal Year:
2022,
Volume and Issue:
12(2), P. 1037 - 1051
Published: Jan. 4, 2022
The
field
of
electrochemical
carbon
dioxide
reduction
has
developed
rapidly
during
recent
years.
At
the
same
time,
role
anodic
half-reaction
received
considerably
less
attention.
In
this
Perspective,
we
scrutinize
reports
on
best-performing
CO2
electrolyzer
cells
from
past
5
years,
to
shed
light
oxygen
evolution
catalyst.
We
analyze
how
different
cell
architectures
provide
local
chemical
environments
at
anode
surface,
which
in
turn
determines
pool
applicable
catalysts.
uncover
factors
that
led
either
a
strikingly
high
current
density
operation
or
an
exceptionally
long
lifetime.
On
basis
our
analysis,
set
criteria
have
be
fulfilled
by
catalyst
achieve
performance.
Finally,
outlook
using
alternative
reactions
(alcohol
oxidation
is
discussed
as
example),
resulting
high-value
products
and
higher
energy
efficiency
for
overall
process.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: Nov. 23, 2023
Stabilizing
active
sites
of
non-iridium-based
oxygen
evolution
reaction
(OER)
electrocatalysts
is
crucial,
but
remains
a
big
challenge
for
hydrogen
production
by
acidic
water
splitting.
Here,
we
report
that
non-stoichiometric
Ti
oxides
(TiOx)
can
safeguard
the
Ru
through
structural-confinement
and
charge-redistribution,
thereby
extending
catalyst
lifetime
in
acid
10
orders
magnitude
longer
compared
to
stoichiometric
one
(Ru/TiO2).
By
exploiting
redox
interaction-engaged
strategy,
situ
growth
TiOx
on
foam
loading
nanoparticles
are
realized
step.
The
as-synthesized
binder-free
Ru/TiOx
exhibits
low
OER
overpotentials
174
265
mV
at
500
mA
cm-2,
respectively.
Experimental
characterizations
theoretical
calculations
confirm
stabilizes
center,
enabling
operation
cm-2
over
37
days.
This
work
opens
an
avenue
using
compounds
as
stable
materials
energy
technologies.
