ACS Energy Letters,
Год журнала:
2024,
Номер
9(7), С. 3342 - 3350
Опубликована: Июнь 14, 2024
In
a
membrane
electrode
assembly
(MEA)
electrolyzer
based
on
cation-exchange
membrane,
achieving
an
efficient
and
stable
CO2
reduction
reaction
(CO2RR)
is
challenging
because
the
transport
of
protons,
cations,
electro-osmotic
water
from
anode
changes
balance
ions.
Herein,
we
derived
microenvironment
for
CO2RR
performance
by
using
two
strategies.
First,
mixture
carbon
anion-exchange
ionomer
buffer
layers
used
to
hold
cations
while
managing
in
local
alkaline
media.
The
second
strategy
involves
pressurizing
only
cathode
side,
resulting
high
concentration
enhancing
reverse
osmosis
phenomenon.
synergistic
effects
these
strategies
create
leading
operation.
Our
approach
viable
industrial
applications
pressurized
MEA
systems
are
processes
that
can
be
commercialized.
Angewandte Chemie International Edition,
Год журнала:
2023,
Номер
62(28)
Опубликована: Март 27, 2023
Abstract
Electrocatalytic
CO
2
reduction
reaction
(CO
RR)
in
membrane
electrode
assembly
(MEA)
systems
is
a
promising
technology.
Gaseous
can
be
directly
transported
to
the
cathode
catalyst
layer,
leading
enhanced
rate.
Meanwhile,
there
no
liquid
electrolyte
between
and
anode,
which
help
improve
energy
efficiency
of
whole
system.
The
remarkable
progress
achieved
recently
points
out
way
realize
industrially
relevant
performance.
In
this
review,
we
focus
on
principles
MEA
for
RR,
focusing
gas
diffusion
electrodes
ion
exchange
membranes.
Furthermore,
anode
processes
beyond
oxidation
water
are
considered.
Besides,
voltage
distribution
scrutinized
identify
specific
losses
related
individual
components.
We
also
summarize
generation
different
reduced
products
together
with
corresponding
catalysts.
Finally,
challenges
opportunities
highlighted
future
research.
Advanced Materials,
Год журнала:
2023,
Номер
36(5)
Опубликована: Авг. 31, 2023
Abstract
Electrocatalytic
CO
2
reduction
into
value‐added
fuels
and
chemicals
by
renewable
electric
energy
is
one
of
the
important
strategies
to
address
global
shortage
carbon
emission.
Though
classical
H‐type
electrolytic
cell
can
quickly
screen
high‐efficiency
catalysts,
low
current
density
limited
mass
transfer
process
essentially
impede
its
industrial
applications.
The
cells
based
on
electrolyte
flow
system
(flow
cells)
have
shown
great
potential
for
devices,
due
higher
density,
improved
local
concentration,
better
efficiency.
design
optimization
are
significance
further
accelerate
industrialization
electrocatalytic
reaction
(CO
RR).
In
this
review,
progress
RR
C
2+
products
concerned.
Firstly,
main
events
in
development
outlined.
Second,
principles
products,
architectures,
types
summarized.
Third,
optimizing
generate
reviewed
detail,
including
cathode,
anode,
ion
exchange
membrane,
electrolyte.
Finally,
preliminary
attempts,
challenges,
research
prospects
toward
discussed.
ACS Nano,
Год журнала:
2023,
Номер
17(13), С. 12884 - 12894
Опубликована: Июнь 20, 2023
Surface
and
interface
engineering,
especially
the
creation
of
abundant
Cu0/Cu+
interfaces
nanograin
boundaries,
is
known
to
facilitate
C2+
production
during
electrochemical
CO2
reductions
over
copper-based
catalysts.
However,
precisely
controlling
favorable
boundaries
with
surface
structures
(e.g.,
Cu(100)
facets
Cu[n(100)×(110)]
step
sites)
simultaneously
stabilizing
challenging,
since
Cu+
species
are
highly
susceptible
be
reduced
into
bulk
metallic
Cu
at
high
current
densities.
Thus,
an
in-depth
understanding
structure
evolution
Cu-based
catalysts
under
realistic
CO2RR
conditions
imperative,
including
formation
stabilization
interfaces.
Herein
we
demonstrate
that
well-controlled
thermal
reduction
Cu2O
nanocubes
a
CO
atmosphere
yields
remarkably
stable
Cu2O-Cu
nanocube
hybrid
catalyst
(Cu2O(CO))
possessing
density
interfaces,
facets,
sites.
The
Cu2O(CO)
electrocatalyst
delivered
Faradaic
efficiency
77.4%
(56.6%
for
ethylene)
industrial
500
mA/cm2.
Spectroscopic
characterizations
morphological
studies,
together
in
situ
time-resolved
attenuated
total
reflection-surface
enhanced
infrared
absorption
spectroscopy
(ATR-SEIRAS)
established
morphology
interfacial
sites
as-prepared
were
preserved
polarization
densities
due
nanograin-boundary-abundant
structure.
Furthermore,
on
acted
increase
*CO
adsorption
density,
thereby
increasing
opportunity
C-C
coupling
reactions,
leading
selectivity.
Energy & Environmental Science,
Год журнала:
2023,
Номер
16(10), С. 4423 - 4431
Опубликована: Янв. 1, 2023
Hydrophobized
nanofibers
of
hierarchical
porosity
as
the
integral
gas
diffusion
electrode
are
demonstrated.
The
GDE
showcases
stable
operation
for
>273
hours
in
neutral
MEA
and
a
single-pass
CO
2
conversion
78%
acidic
MEA.
Journal of the American Chemical Society,
Год журнала:
2024,
Номер
146(14), С. 10084 - 10092
Опубликована: Март 26, 2024
Glycine
is
a
nonessential
amino
acid
that
plays
vital
role
in
various
biological
activities.
However,
the
conventional
synthesis
of
glycine
requires
sophisticated
procedures
or
toxic
feedstocks.
Herein,
we
report
an
electrochemical
pathway
for
via
reductive
coupling
oxalic
and
nitrate
nitrogen
oxides
over
atomically
dispersed
Fe–N–C
catalysts.
A
selectivity
70.7%
achieved
Fe–N–C-700
at
−1.0
V
versus
RHE.
Synergy
between
FeN3C
structure
pyrrolic
facilitates
reduction
to
glyoxylic
acid,
which
crucial
producing
oxime
glycine,
could
reduce
energy
barrier
*HOOCCH2NH2
intermediate
formation
thus
accelerating
conversion
glycine.
This
new
approach
value-added
chemicals
using
simple
carbon
sources
provide
sustainable
routes
organonitrogen
compound
production.
