Electrolysis
of
industrial
and
human
urea-containing
wastewater
is
beneficial
to
the
environment,
using
urea
oxidation
reaction
(UOR)
instead
oxygen
evolution
(OER)
saves
energy
effectively
improves
performance
electrocatalytic
hydrolysis
for
hydrogen
production.
The
Co9S8/Ni3S2
nanosheet
structures
on
nickel
foam
(NF)
are
an
active
hydrophilic
catalyst
UOR
(HER).
This
electrocatalyst
needs
a
low
overpotential
136
mV
attain
10
mA·cm–2
HER,
it
can
reach
current
density
100
at
working
potential
1.36
V
vs
RHE.
introduction
Co
element
regulates
both
morphology
electronic
structure.
former
results
in
Co9S8/Ni3S2/NF
offering
more
sites
with
larger
specific
surface
area
morphology,
while
latter
drives
S
move
direction
binding
energy.
examination
cobalt
sulfides
as
bifunctional
energy-efficient
electrolytic
H2
production
purification
urea-rich
harmless
has
significantly
advanced
due
this
work.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: March 29, 2024
Abstract
Establishing
appropriate
metal-support
interactions
is
imperative
for
acquiring
efficient
and
corrosion-resistant
catalysts
water
splitting.
Herein,
the
interaction
mechanism
between
Ru
nanoparticles
a
series
of
titanium
oxides,
including
TiO,
Ti
4
O
7
TiO
2,
designed
via
facile
non-stoichiometric
engineering
systematically
studied.
7,
with
unique
band
structure,
high
conductivity
chemical
stability,
endows
ingenious
through
interfacial
Ti–O–Ru
units,
which
stabilizes
species
during
OER
triggers
hydrogen
spillover
to
accelerate
HER
kinetics.
As
expected,
Ru/Ti
displays
ultralow
overpotentials
8
mV
150
long
operation
500
h
at
10
mA
cm
−2
in
acidic
media,
expanded
pH-universal
environments.
Benefitting
from
excellent
bifunctional
performance,
proton
exchange
membrane
anion
electrolyzer
assembled
achieves
superior
performance
robust
operation.
The
work
paves
way
energy
conversion
devices.
Microstructures,
Journal Year:
2025,
Volume and Issue:
5(2)
Published: Feb. 26, 2025
Developing
efficient
and
economical
electrocatalysts
for
hydrogen
generation
at
high
current
densities
is
crucial
advancing
energy
sustainability.
Herein,
a
self-supported
evolution
reaction
(HER)
electrocatalyst
rationally
designed
prepared
on
nickel
foam
through
simple
two-step
chemical
etching
method,
which
consists
of
Pt
quantum
dots
(PtQDs)
coupled
with
nickel-iron
layered
double
hydroxide
(NiFe
LDH)
nanosheets
(named
PtQDs@NiFe
LDH).
The
characterization
results
indicate
that
the
introduction
PtQDs
induces
more
oxygen
vacancies,
thereby
optimizing
electronic
structure
LDH.
This
modification
enhances
conductivity
accelerates
adsorption/desorption
kinetics
intermediates
in
LDH,
ultimately
resulting
exceptional
catalytic
performance
HER
large
densities.
Specifically,
LDH
delivers
500
2000
mA·cm-2
remarkably
low
overpotentials
92
252
mV,
respectively,
markedly
outperforming
commercial
Pt/C
(η500
=
190
η2000
436
mV).
Moreover,
when
employing
NiFe
precursor
catalyst
as
anode
cathode,
an
overall
water
electrolysis
system,
only
1.66
V
2.02
are
required
to
achieve
mA·cm-2,
while
maintaining
robust
stability
200
h.
study
introduces
feasible
approach
developing
industrial-scale
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 17, 2025
Regulating
the
surface
oxophilicity
of
electrocatalyst
is
known
as
an
efficient
strategy
to
mitigate
order-of-magnitude
kinetic
slowdown
hydrogen
electrocatalysis
in
a
base,
which
great
scientific
and
technological
significance.
So
far,
its
mechanistic
origin
remains
mainly
ascribed
bifunctional
or
electronic
effects
that
revolve
around
catalyst-intermediate
interactions
under
extensive
debate.
In
addition,
understanding
from
perspective
interfacial
electric-double-layer
(EDL)
structures,
should
also
strongly
depend
on
electrode
property,
still
lacking.
Here,
by
decorating
Pt
with
Mo,
Ru,
Rh,
Au
metal
atoms
tune
systematically
combining
electrochemical
activity
tests,
situ
surface-enhanced
infrared
absorption
spectroscopy,
density
functional
theory
calculation,
ab
initio
molecular
dynamics
simulation,
we
found
there
exist
consistent
volcano-type
relationships
between
*OH
adsorption
strength
alkaline
evolution
activity,
stretching/bending
vibration
information
water,
potential
zero
charge
(PZC)
electrode.
This
demonstrates
impacting
electrocatalytic
lies
modification
toward
PZC,
thereby
dictates
electric
field
strength,
rigidity,
bonding
network
structure
EDL
ultimately
governs
proton
transfer
kinetics.
These
findings
emphasize
importance
focusing
interface
structures
understand
property-dependent
reaction
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 19, 2024
Abstract
Electrocatalytic
water
splitting
is
an
attractive
approach
for
large‐scale
hydrogen
generation,
critical
global
carbon
neutrality.
However,
the
prevalent
commercialized
alkaline
electrolysis
generally
conducted
at
low
current
densities
due
to
sluggish
kinetics
and
high
overpotential,
severely
hampering
high‐efficiency
production.
Exploration
of
evolution
reaction
(HER)
electrocatalysts
that
can
reliably
operate
ampere‐level
under
overpotentials
thus
a
primary
challenge.
In
contrast
extensive
studies
using
powdery
electrocatalysts,
self‐supported
metallic
catalytic
cathode
has
become
burgeoning
direction
toward
densities,
owing
their
integrated
design
with
intensive
interfacial
binding,
conductivity
mechanical
stability
industrial
tolerance/adaption.
Recent
years
have
witnessed
tremendous
research
advances
in
designing
electrocatalysts.
Therefore,
this
flourishing
area
specially
summarized.
Beginning
introduction
theory
mechanism
HER,
engineering
strategies
on
electrodes
are
systematically
summarized,
including
metal
alloy
construction,
heterostructure
engineering,
doping
manipulation,
surface
design.
Meanwhile,
particular
emphasis
focused
relationship
between
structure,
activity,
HER.
Finally,
existing
challenges,
requirements
industrial‐scale
application,
future
aiming
provide
better
solution
electrolysis.
