Industrial & Engineering Chemistry Research,
Journal Year:
2024,
Volume and Issue:
63(43), P. 18348 - 18358
Published: Oct. 16, 2024
The
electrochemical
reduction
of
CO2
(CO2RR)
to
generate
high-value
fuels
presents
a
promising
strategy
for
addressing
the
global
warming
crisis.
Cobalt
phthalocyanine
(CoPc)
is
electrocatalyst
in
which
local
electronic
environment
Co–N
site
plays
key
role
regulating
catalytic
performance.
In
this
work,
CoPc
was
grown
situ
on
carbon
nanotubes
(CNT)
via
hydrothermal
reaction,
resulting
synthesis
molecularly
dispersed
CoPc-CNT
catalyst.
X-ray
absorption
fine
structure
(XAFS)
analysis
confirmed
presence
Co–N6
ligands
with
atomically
cobalt
catalyst,
served
as
active
sites
conversion
CO.
coupling
and
CNT
resulted
bond
lengths,
enhancing
binding
energy
thereby
improving
stability.
CO
Faradaic
efficiency
exhibiting
excellent
stability,
reached
99.66%
(flow
cell)
at
−1.6
V
(vs
Ag/AgCl),
significantly
surpassing
that
Chemical Society Reviews,
Journal Year:
2024,
Volume and Issue:
53(10), P. 5149 - 5189
Published: Jan. 1, 2024
This
review
summarizes
promising
strategies
including
the
design
of
catalysts
and
construction
coupled
electrocatalytic
reaction
systems,
aimed
at
achieving
selective
production
various
products
from
CO
2
electroreduction.
Proceedings of the National Academy of Sciences,
Journal Year:
2025,
Volume and Issue:
122(2)
Published: Jan. 7, 2025
Molecular
catalysts
with
a
single
metal
center
are
reported
to
reduce
CO
2
wide
range
of
valuable
single-carbon
products
like
CO,
HCOOH,
CH
3
OH,
etc.
However,
these
cannot
two
carbon
ethane
or
ethylene
and
the
ability
form
C–C
from
remains
mostly
limited
heterogeneous
material-based
catalysts.
We
report
set
simple
iron
porphyrins
pendant
thiol
group
can
catalyze
reduction
(C
H
6
)
O
as
proton
source
Faradaic
yield
>40%
rest
being
CO.
The
mechanism
involves
-derived
methyl
transfer
akin
proposal
forwarded
for
transferases
follow-up
bond
formation
thioether
thus
formed
Fe(II)–CH
species
generated
by
second
molecule
.
availability
“parking
space”
in
molecular
framework
first
reduced
C
1
product
allows
resulting
unique
case
where
component
natural
gas
be
direct
electrochemical
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(23), P. 16348 - 16354
Published: May 28, 2024
Molecular
catalysts
such
as
cobalt
phthalocyanine
(CoPc)
exhibit
remarkable
electrochemical
activity
in
methanol
production
from
CO2
or
CO,
but
fast
conversion
with
a
high
current
density
is
still
yet
to
be
realized.
While
adopting
flow
cells
gas
diffusion
electrodes
common
approach
enhanced
reaction
rates,
the
scientific
and
engineering
knowledge
primarily
centers
on
metal
particle-based
like
Cu.
This
focus
overlooks
emerging
heterogenized
molecular
distinct
physical
chemical
properties.
In
this
work,
we
observe
that
partial
of
CO
reduction
catalyzed
by
tetraamine-substituted
CoPc
(CoPc-NH2)
supported
carbon
nanotubes
(CNTs)
remains
below
30
mA
cm–2,
even
systematic
optimization
structural
operational
parameters
cell.
A
comparative
analysis
Cu
catalyst
reveals
porous
electrolyte-philic
nature
CoPc-NH2/CNT
leaves
large
fraction
active
sites
deprived
under
conditions.
To
address
microenvironmental
challenge,
directly
use
reactant,
leveraging
its
faster
rate
water
compared
CO.
Effective
generates
situ
feed
catalytic
sites,
achieving
an
unprecedently
for
129
cm–2.
research
underscores
necessity
new
insights
approaches
development
catalyst-based
electrodes.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(32), P. 22129 - 22133
Published: July 31, 2024
Formox,
a
highly
energy-intensive
process,
currently
serves
as
the
primary
source
of
formaldehyde
(HCHO),
for
which
there
is
crucial
and
steadily
growing
chemical
demand.
The
alternative
electrochemical
production
HCHO
from
C1
carbon
sources
such
CO2
CO
still
in
its
early
stages,
with
even
few
identified
cases
lacking
mechanistic
rationalization.
In
this
study,
we
demonstrate
that
cobalt
phthalocyanine
(CoPc)
immobilized
on
multiwalled
nanotubes
(MW-CNTs)
constitutes
an
excellent
electrocatalytic
system
producing
productivity
through
direct
reduction
CO,
two-electron
product
CO2.
By
carefully
adjusting
both
pH
applied
potential,
conditions
enable
partial
current
density
0.64
mA
cm–2
(17.5%
Faradaic
efficiency,
FE)
total
FE
61.2%
liquid
products
(formaldehyde
methanol).
A
mechanism
proposed.
