Voprosy Khimii i Khimicheskoi Tekhnologii,
Год журнала:
2024,
Номер
6, С. 55 - 60
Опубликована: Дек. 1, 2024
This
study
presents
the
results
of
experimental
determination
and
theoretical
calculations
thermal
effect
aluminum
dissolution
in
alkaline
solutions
accompanied
by
hydrogen
evolution.
The
experiments
were
conducted
using
an
EK1
calorimeter,
with
temperature
measurements
recorded
every
10
seconds.
Potassium
hydroxide
concentrations
ranging
from
0.5
to
5
mol/L
utilized.
It
was
demonstrated
that
variation
curves
over
time,
dynamics
at
different
solution
concentrations,
rate
exhibit
S-shaped
profile.
aqueous
depends
on
KOH
concentration.
As
concentration
increases
2
mol/L,
reaction
rises.
Further
increasing
alkali
almost
no
change
effect.
3–5
sodium
found
be
1300
J/g.
experimentally
determined
falls
within
range
values
calculated
thermodynamic
data
(from
1165
1528
J/g).
obtained
this
can
applied
development
relatively
low-cost
production
technologies.
Langmuir,
Год журнала:
2024,
Номер
40(42), С. 22230 - 22244
Опубликована: Окт. 11, 2024
A
catalyst
of
the
oxygen
evolution
reaction
(OER)
that
is
viable,
affordable,
and
active
for
effective
water-splitting
applications
critical.
variety
electrocatalysts
have
been
discovered
to
replace
noble
metal-based
catalysts.
Of
these,
transition
sulfides
are
essential
incorporating
carbonaceous
materials
improve
electrical
conductivity,
resulting
in
better
electrocatalytic
performance.
Our
study
illustrates
synthesis
Cu
The
construction
of
an
efficient
and
durable
oxygen
evolution
reaction
(OER)
electrocatalyst
through
a
simple
synthesis
strategy
is
crucial
for
the
hydrogen
produced
from
seawater
splitting.
However,
achieving
this
goal
remains
great
challenge.
Herein,
amorphous
Fe-doped
nickel
phosphate
(Fe-NixPO4)
as
high-performance
OER
electrocatalysts
alkaline
freshwater/seawater
splitting
presented
using
straightforward
co-precipitation
method
at
room-temperature.
Experimental
results
reveal
structural
reconstruction
Fe-NixPO4
into
NiOOH
decorated
with
PO4
3-.
collaborative
interplay
between
Ni2+
Fe3+,
along
decoration
3-,
can
effectively
modulate
electronic
environment
electrocatalyst.
Consequently,
optimized
exhibits
exceptional
activity,
requiring
overpotentials
359
422
mV
to
generate
1000
mA
cm-2
in
freshwater
seawater,
respectively.
Moreover,
also
displays
outstanding
stability
100
h
seawater.
This
research
presents
viable
approach
fabricating
efficiency
electrolysis.
The
pursuit
of
sustainable
energy
solutions
has
driven
extensive
research
into
efficient
and
cost-effective
water-splitting
techniques.
This
study
introduces
a
straightforward
method
employing
nickel
molybdenum
oxide
NiMoO4
(NMO)
nanorods
integrated
with
graphitic
carbon
nitride
(g-CN)
sheets
as
promising
catalysts
for
water
splitting.
coupling
between
NMO
g-CN
leverages
the
distinctive
properties
both
materials
to
boost
robustness
well
effectiveness
in
catalysis
oxygen
evolution
reaction
(OER)
hydrogen
(HER).
We
systematically
optimized
nanostructure
by
adjusting
reduction
annealing
temperature
during
calcination
improve
HER
OER
activities.
NMO@g-CN-600
nanostructured
catalyst
demonstrates
exceptional
electrochemical
activity
acidic
media,
an
overpotential
148
mV
at
10
mA
cm–2
current
density,
which
is
approximately
2.72
times
lower
than
that
bare
2.97
pristine
catalysts.
Under
alkaline
conditions,
exhibited
superior
252
reach
density
cm–2,
outperforming
Additionally,
demonstrated
excellent
long-term
stability
chronoamperometric
testing
over
50
h
basic
environments,
showing
low
Tafel
slopes
97
98
dec–1,
respectively.
Various
analytical
methods
confirmed
successful
synthesis
structural
prepared
outstanding
electrocatalytic
position
it
feasible
choice
platinum-group-based
overall
electrolysis.
IOP Conference Series Earth and Environmental Science,
Год журнала:
2025,
Номер
1491(1), С. 012053 - 012053
Опубликована: Апрель 1, 2025
Abstract
This
paper
presents
a
study
of
the
kinetics
hydrogen
evolution
and
iron
dissolution
in
reactor
with
soluble
anode.
concept
allows
for
implementation
an
environmentally
friendly
method
obtaining
reduced
energy
costs
due
to
use
anodes
from
scrap
iron.
The
composition
concentrations
catholyte
anolyte
are
substantiated
point
view
ensuring
high
rates
electrode
processes.
Hydrochloric
acid
or
its
mixture
sodium
chloride
used
as
catholyte.
maximum
rate
is
achieved
HCl
addition
5
mol/l
NaCl
at
pH
3
It
shown
that
electrolyte
this
has
sufficiently
electrical
conductivity
ensures
minimal
polarization
electrode.
A
solution
containing
anolyte.
In
proposed
design,
anode
cathode
separated.
Polarization
curves
presented
Tafel
coordinates,
values
coefficients
b
equation
calculated
electrolytes
different
compositions
temperature
20
°C.
