Solar RRL,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Sept. 17, 2024
Hydrogen
energy
from
water
splitting
is
considered
the
highly
anticipated
modern
resource;
however,
storage
and
transportation
require
complex
high‐cost
facilities,
which
argue
about
efficiency
of
hydrogen
fuel
compared
to
conventional
fuels.
Thereby,
ammonia
(NH
3
),
a
liquid
at
ambient
conditions,
promises
lower
cost
transportation,
but
production
imposes
difficulties
with
selectivity
over
several
products
and,
notably,
evolution
reaction.
Among
methods
combining
advantages
electrochemical
photocatalytic
properties,
photoelectrochemical
(PEC)
method
destined
improve
N
2
reduction
reaction
(NRR).
Because
multistep
NRR
process,
enormous
negative
potentials,
poor
kinetics,
activity
are
severely
compromised.
Therefore,
Mo‐
Bi‐based
catalysts
rationally
developed
promote
processes.
Combining
benefits
result
in
effective
PEC
activity.
This
review
predicted
emphasize
role
characteristics
value
Mo
Bi
raising
ammonia's
selectivity.
ACS Catalysis,
Journal Year:
2023,
Volume and Issue:
13(20), P. 13516 - 13527
Published: Oct. 6, 2023
Eight-electron
nitrate
reduction
(NO3RR)
offers
a
cost-effective
and
environmentally
friendly
route
of
ammonia
production
wastewater
remediation.
However,
identification
reinforcement
the
metal–ligand
interaction
responsible
for
catalytic
activity
in
transition-metal
phthalocyanine-based
heterostructures
still
remain
unclear
due
to
their
complexity.
Herein,
directed
by
computation,
we
present
heterostructure
approach
couple
2D
graphene
sheets
with
1D
manganese
(II)
phthalocyanine
produce
pyrrolic-N
coordinated
electron-deficient
Mn
center
that
interacts
generate
vital
intermediates
NO3RR
process.
The
catalyst
system
delivers
an
yield
rate
20,316
μg
h–1
mgcat–1,
faradaic
efficiency
(FE)
98.3%,
electrocatalytic
stability
50
h.
Mechanistic
investigations
verified
FTIR
spectroscopy
theoretical
calculations
identify
as
active
sites
MnPc
RGO
reinforce
orbital
enhancing
charge
transfer
formation
*NOH
@
while
suppressing
competitive
hydrogen
evolution
reaction
(HER),
resulting
high
selectivity
FE.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
14(42)
Published: Sept. 25, 2024
Abstract
Using
low
and
optimized
magnetic
field
along
with
electric
is
a
novel
strategy
to
facilitate
electrochemical
nitrite
reduction
reaction
(NO
2
RR).
Herein,
the
assisted
electrocatalytic
ammonia
synthesis
employing
spin‐thrusted
β‐MnPc
at
95
mT
explored.
The
calculated
rate
of
generation
16603.4
µg
h
−1
mg
cat
,
which
almost
twice
that
nonpolarized
manganese
phthalocyanine
(MnPc)
catalyst.
Additionally,
Faradaic
efficiency
(FE)
–0.9
V
versus
RHE
found
be
92.9%,
significantly
higher
compared
MnPc
In
presence
external
field,
catalysts
provide
better
electron
transfer
channel
results
in
lower
charge
resistance
hence
performances.
Density
functional
theory
(DFT)
result
further
verifies
induced
has
potential
barrier
(0.51
eV)
for
protonation
NO*
than
(1.08
eV),
confirms
enhanced
ammonia.
Small Methods,
Journal Year:
2024,
Volume and Issue:
8(7)
Published: Jan. 14, 2024
Abstract
Electrocatalysis
performs
a
vital
role
in
numerous
energy
transformation
and
repository
mechanics,
including
power
cells,
Electric
field‐assisted
catalysis,
batteries.
It
is
crucial
to
investigate
new
methods
improve
electrocatalytic
performance
if
effective
long‐lasting
systems
are
developed.
The
modulation
of
catalytic
activity
selectivity
by
external
magnetic
fields
over
electrochemical
processes
has
received
lot
interest
lately.
How
the
use
various
electrocatalysis
great
promise
for
building
selective
catalysts,
opening
door
advancement
sophisticated
conversion
discussed.
Furthermore,
challenges
possibilities
incorporating
into
suggestions
future
research
areas
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: June 14, 2024
Abstract
The
Ostwald
process,
which
is
producing
HNO
3
for
commercial
use,
involves
the
catalytic
oxidation
of
NH
and
a
series
chemical
reactions
conducted
under
severe
operating
conditions.
Due
to
their
energy‐intensive
nature,
these
activities
play
major
role
in
greenhouse
gas
emissions
global
energy
consumption.
In
response
urgent
requirements
environmental
sectors,
there
an
increasingly
critical
need
develop
novel,
highly
efficient,
environmentally
sustainable
methods.
Herein,
CoPc/C
N
4
electrocatalyst,
integrating
CoPc
nanotubes
with
C
nanosheets,
shown.
electrocatalyst
demonstrates
yield
rate
871.8
µmol
h
−1
g
cat
at
2.2
V,
corresponding
Faradaic
efficiency
(FE)
46.4%
2.1
notably
surpasses
that
CoPc.
Through
combination
experimental
investigations
density
functional
theory
(DFT)
calculations,
this
study
shows
anchored
on
effectively
simplifies
adsorption
activation
chemically
inactive
nitrogen
molecules.
improved
activity
composite
system
may
be
reason
re‐distribution
charges
over
CoPc,
tuning
valence
orbital
Co
center
due
presence
2D
layer
.
This
mechanism
significantly
lowers
barrier
required
breaking
inert
2
,
ultimately
leading
significant
improvement
efficiency.
RSC Sustainability,
Journal Year:
2024,
Volume and Issue:
2(6), P. 1631 - 1674
Published: Jan. 1, 2024
Over
the
past
20
years,
graphene
has
impacted
various
applications.
Similar
to
graphene,
monoelemental
2D
materials
from
groups
13–16
have
shown
potential
in
catalysis,
supercapacitors,
and
battery
applications
recent
years.
Tetrahedron Green Chem,
Journal Year:
2024,
Volume and Issue:
3, P. 100040 - 100040
Published: March 21, 2024
Ammonia
(NH3)
stands
as
a
cornerstone
compound
across
industries,
pivotal
in
agriculture,
chemicals,
and
energy
sectors.
However,
the
conventional
Haber-Bosch
process
demands
high
pressures,
temperatures,
fossil
fuels,
calling
for
sustainable
alternatives.
Electrocatalytic
Nitrogen
Reduction
Reactions
(E-NRRs)
Photocatalytic
(Photo-NRRs)
present
innovative
routes,
leveraging
electricity
direct
sunlight
to
convert
nitrogen
(N2)
NH3
under
mild
conditions,
reducing
emissions
softening
requirements.
Catalysts
play
strategic
role
these
approaches,
overcoming
activation
barriers
enhancing
efficiency.
some
challenges
still
need
be
addressed.
Indeed,
noble
metals
exhibit
limits
their
scarcity,
geopolitical
involvement,
often
fluctuating
costs
inhibit
large-scale
use.
Non-noble
offer
promise
but
require
optimization
face
durability
concerns.
Finally,
carbon-based
catalysts
doping.
In
this
scenario,
molecular-based
approach,
comprising
both
specific
single
coordination-based
molecules
with
transition
metal
centres
either
centre
or
fully
organic
multi-dimensional
networks
originating
from
molecular
precursors,
overcomes
issues
while
keeping
benefits
of
previously
mentioned
classes
compounds.
This
mini-review
explores
approach
E-NRRs
Photo-NRRs
coordination
compounds
carrying
porphyrins
phthalocyanines
ligands
polymeric
based
on
between
metallic
(Metal-Organic
Frameworks),
units
into
structures
(Covalent
Organic
Frameworks).
Mechanistic
insights
pathways
elucidate
N2
conversion
NH3.
A
critical
comparative
evaluation
reported
has
been
carried
out
highlight
possibilities
each
class
Although
persist
terms
stability,
cost
complexity
synthesis,
use
NRRs
represents
one
most
promising
routes
towards
preparation
ammonia.
