Catalysts,
Journal Year:
2024,
Volume and Issue:
14(11), P. 817 - 817
Published: Nov. 13, 2024
Electrocatalytic
nitrate
reduction
enables
the
recovery
of
from
water
under
mild
conditions
and
generates
ammonia
for
nitrogen
fertilizer
feedstock
in
an
economical
green
means.
In
this
paper,
Co/biomass
carbon
(Co/BC)
composite
catalysts
were
prepared
by
co-carbonization
straw
metal–organic
framework
material
ZIF-67
electrocatalytic
using
hydrothermal
annealing
methods.
The
structure
disperses
catalyst
components
well
provides
a
wider
specific
surface
area,
which
is
conducive
to
adsorption
provision
more
reactive
active
sites.
introduction
biomass
additionally
enhances
electrical
conductivity
facilitates
electron
transport.
After
electrochemical
testing,
Co/BC-100
exhibited
best
performance
ammonia,
with
yield
3588.92
mmol
gcat.−1
h−1
faradaic
efficiency
97.01%
at
−0.5
V
vs.
RHE
potential.
This
study
promising
approach
construction
other
efficient
cobalt-based
electrocatalysts.
Materials,
Journal Year:
2025,
Volume and Issue:
18(9), P. 1952 - 1952
Published: April 25, 2025
Hydrogen
and
oxygen
serve
as
energy
carriers
that
can
ease
the
transition
of
due
to
their
high
densities.
Nonetheless,
production
processes
entail
development
efficient
low-cost
storage
conversion
technologies.
In
this
regard,
photoelectrocatalysts
are
materials
based
on
photoelectronic
effect
where
electrons
holes
interact
with
H2O,
producing
H2
O2,
in
some
cases,
is
achieved
acceptable
efficiency.
Although
there
several
reviews
topic,
most
them
focus
traditional
semiconductors,
such
TiO2
ZnO,
neglecting
others,
those
non-noble
metals
organic
ones.
Herein,
semiconductors
like
CdSe,
NiWO4,
Fe2O3,
others
have
been
investigated
compared
terms
photocurrent
density,
band
gap,
charge
transfer
resistance.
addition,
brief
review
aims
discuss
mechanisms
overall
water-splitting
reactions
from
a
photonic
point
view
subsequently
discusses
engineering
material
synthesis.
Advanced
composites
also
addressed,
WO3/BiVO4/Cu2O
CN-FeNiOOH-CoOOH,
which
demonstrate
efficiency
by
delivering
densities
5
mAcm−2
3.5
mA
cm−2
at
1.23
vs.
RHE,
respectively.
Finally,
authors
offer
perspectives
list
main
challenges
experience
developing
semiconductor-based
applied
fields.
manner,
provides
advances
these
topics,
used
references
for
new
directions
designing
active
photoelectrocatalytic
water
splitting.
Small,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 5, 2024
Abstract
Electrocatalytic
nitrate
(NO
3
−
)
reduction
to
ammonia
(NH
is
a
green
and
efficient
NH
synthesis
technology.
Metallic
silver
(Ag)
one
of
the
well‐known
electrocatalysts
for
NO
reduction.
However,
under
alkaline
conditions,
its
poor
water‐splitting
ability
fails
provide
sufficient
protonic
hydrogen
required
synthesis,
resulting
in
low
selectivity.
Additionally,
metal
catalysts
are
prone
leaching
oxidation
during
electrocatalysis,
stability.
Herein,
cobalt
(Co)
into
Ag
(CoAg)
catalyst
doped,
which
not
only
increases
selectivity
by
34.4%,
but
also
reduces
potential
0.1
V.
Meanwhile,
reduced
graphene
oxide
(rGO)
as
protective
“armor”
used
encapsulate
CoAg
(rGO
2.92
@CoAg).
The
rGO
@CoAg
shows
excellent
stability
over
300
hours
(h)
continuous
reaction.
Co
contents
after
tests
decreases
4.3%
3.1%,
respectively,
much
lower
than
those
without
(90.8%,
52.6%).
Moreover,
high
Faradaic
efficiency
(99.3%)
yield
rate
(1.47
mmol
h
−1
cm
−2
).
Therefore,
performance
strong
obtained
doping
coating,
provides
theoretical
basis
practical
industrial
application.
