Journal of The Electrochemical Society,
Journal Year:
2020,
Volume and Issue:
167(4), P. 044508 - 044508
Published: Jan. 3, 2020
Recently,
the
field
of
CO
2
electrolysis
has
experienced
rapid
scientific
and
technological
progress.
This
review
focuses
specifically
on
electrochemical
conversion
into
carbon
monoxide
(CO),
an
important
“building
block”
for
chemicals
industry.
technologies
offer
potentially
carbon-neutral
routes
production
specialty
commodity
chemicals.
Many
different
are
actively
being
pursued.
Electrochemical
reduction
from
aqueous
solutions
stems
success
alkaline
polymer
electrolyte
membrane
electrolyzers
water
uses
performance
metrics
established
within
electrochemistry.
High-temperature
systems
rely
heavily
experience
gained
developing
molten
carbonate
solid
oxide
fuel
cells,
where
device
is
evaluated
using
very
parameters,
commonly
employed
in
solid-state
In
this
review,
state-of-the-art
low-temperature,
carbonate,
reviewed,
followed
by
a
direct
comparison
three
some
most
common
figures
merit
each
field.
Based
comparison,
high-temperature
cells
seems
to
be
particularly
attractive
method
production,
owing
its
high
efficiency
proven
durability,
even
at
commercially
relevant
current
densities.
Science,
Journal Year:
2020,
Volume and Issue:
367(6478), P. 661 - 666
Published: Feb. 6, 2020
Electrolysis
offers
an
attractive
route
to
upgrade
greenhouse
gases
such
as
carbon
dioxide
(CO2)
valuable
fuels
and
feedstocks;
however,
productivity
is
often
limited
by
gas
diffusion
through
a
liquid
electrolyte
the
surface
of
catalyst.
Here,
we
present
catalyst:ionomer
bulk
heterojunction
(CIBH)
architecture
that
decouples
gas,
ion,
electron
transport.
The
CIBH
comprises
metal
superfine
ionomer
layer
with
hydrophobic
hydrophilic
functionalities
extend
ion
transport
from
tens
nanometers
micrometer
scale.
By
applying
this
design
strategy,
achieved
CO2
electroreduction
on
copper
in
7
M
potassium
hydroxide
(pH
≈
15)
ethylene
partial
current
density
1.3
amperes
per
square
centimeter
at
45%
cathodic
energy
efficiency.
Journal of the American Chemical Society,
Journal Year:
2019,
Volume and Issue:
141(19), P. 7646 - 7659
Published: April 15, 2019
Electrochemical
reduction
of
CO2
to
high-energy-density
oxygenates
and
hydrocarbons
beyond
CO
is
important
for
long-term
large-scale
renewable
energy
storage.
However,
the
key
step
C-C
bond
formation
needed
generation
C2
products
induces
an
additional
barrier
on
reaction.
This
inevitably
creates
larger
overpotentials
greater
variety
as
compared
conversion
C1
products.
Therefore,
in-depth
understanding
catalytic
mechanism
required
advancing
design
efficient
electrocatalysts
control
reaction
pathway
desired
Herein,
we
present
a
critical
appraisal
focusing
connection
between
fundamentals
electrocatalysts.
An
discussion
mechanistic
aspects
various
pathways
copper-based
catalysts
presented
together
with
consideration
practical
factors
under
electrocatalytic
operating
conditions.
By
providing
some
typical
examples
illustrating
benefit
merging
theoretical
calculations,
surface
characterization,
electrochemical
measurements,
try
address
issues
ongoing
debate
toward
better
at
atomic
level
envisioning
roadmap
generation.
Journal of the American Chemical Society,
Journal Year:
2020,
Volume and Issue:
142(13), P. 6400 - 6408
Published: March 16, 2020
Selective
and
efficient
catalytic
conversion
of
carbon
dioxide
(CO2)
into
value-added
fuels
feedstocks
provides
an
ideal
avenue
to
high-density
renewable
energy
storage.
An
impediment
enabling
deep
CO2
reduction
oxygenates
hydrocarbons
(e.g.,
C2+
compounds)
is
the
difficulty
coupling
carbon-carbon
bonds
efficiently.
Copper
in
+1
oxidation
state
has
been
thought
be
active
for
catalyzing
formation,
whereas
it
prone
being
reduced
Cu0
at
cathodic
potentials.
Here
we
report
that
catalysts
with
nanocavities
can
confine
intermediates
formed
situ,
which
turn
covers
local
catalyst
surface
thereby
stabilizes
Cu+
species.
Experimental
measurements
on
multihollow
cuprous
oxide
exhibit
a
Faradaic
efficiency
75.2
±
2.7%
partial
current
density
267
13
mA
cm-2
large
C2+-to-C1
ratio
∼7.2.
Operando
Raman
spectra,
conjunction
X-ray
absorption
studies,
confirm
species
as-designed
are
well
retained
during
reduction,
leads
marked
selectivity
rate.
ACS Energy Letters,
Journal Year:
2018,
Volume and Issue:
4(1), P. 317 - 324
Published: Dec. 14, 2018
Significant
advances
have
been
made
in
recent
years
discovering
new
electrocatalysts
and
developing
a
fundamental
understanding
of
electrochemical
CO2
reduction
processes.
This
field
has
progressed
to
the
point
that
efforts
can
now
focus
on
translating
this
knowledge
toward
development
practical
electrolyzers,
which
potential
replace
conventional
petrochemical
processes
as
sustainable
route
produce
fuels
chemicals.
In
Perspective,
we
take
critical
look
at
progress
incorporating
catalysts
into
device
architectures
operate
using
vapor-phase
reactants,
thereby
overcoming
intrinsic
limitations
aqueous-based
systems.
Performance
comparison
is
between
state-of-the-art
electrolyzers
commercial
H2O
electrolyzers—a
well-established
technology
provides
realistic
performance
targets.
Beyond
just
higher
rates,
vapor-fed
reactors
represent
paradigms
for
unprecedented
control
local
reaction
conditions,
provide
perspective
challenges
opportunities
generating
achieving
technological
electrolyzers.
