Catalysts,
Journal Year:
2024,
Volume and Issue:
15(1), P. 15 - 15
Published: Dec. 27, 2024
The
hydrogen
economy,
as
an
emerging
paradigm
for
sustainable
energy,
relies
on
efficient
oxidation
(HOR)
and
evolution
reactions
(HER).
These
require
effective
catalysts
to
enhance
reaction
kinetics
reduce
costs.
Platinum
(Pt)
is
widely
used
but
faces
issues
such
high
cost
CO
poisoning.
Non-precious
metal
catalysts,
particularly
Ni-based
alloys,
are
being
explored
viable
alternatives.
This
study
introduces
a
ternary
MoWNi
alloy
catalyst
synthesized
via
microwave-assisted
methods
annealing.
achieves
current
density
of
3.5
mA·cm−2
at
overpotential
100
mV
in
HOR
requires
only
25
reach
10
HER,
making
it
comparable
commercial
20%
Pt/C
catalysts.
Notably,
the
also
exhibits
superior
stability
resistance
toxicity.
findings
underscore
potential
advancing
hydrogen-based
energy
systems.
Chemical Reviews,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 28, 2025
The
reactions
critical
for
the
energy
transition
center
on
chemistry
of
hydrogen,
oxygen,
carbon,
and
heterogeneous
catalyst
surfaces
that
make
up
electrochemical
conversion
systems.
Together,
surface-adsorbate
interactions
constitute
interphase
define
reaction
kinetics
many
clean
technologies.
Practical
devices
introduce
high
levels
complexity
where
surface
roughness,
structure,
composition,
morphology
combine
with
electrolyte,
pH,
diffusion,
system
level
limitations
to
challenge
our
ability
deconvolute
underlying
phenomena.
To
significant
strides
in
materials
design,
a
structured
approach
based
well-defined
is
necessary
selectively
control
distinct
parameters,
while
added
sequentially
through
careful
application
nanostructured
surfaces.
In
this
review,
we
cover
advances
made
key
elements
field,
beginning
simplest
hydrogen
oxidation
evolution
concluding
more
complex
organic
molecules.
each
case,
offer
unique
perspective
contribution
systems
understanding
technologies
how
wider
deployment
can
aid
intelligent
design.
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 Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 26, 2025
Abstract
Electrocatalytic
nitrate
reduction
to
ammonia
(NRA)
offers
an
attractive
route
for
converting
pollutants
under
mild
conditions.
Among
other
catalysts,
single‐atom
catalysts
(SACs)
with
high
metal‐atom‐utilization
efficiency
and
low‐coordinated
metal
sites
hold
immense
potential
be
extensively
applied,
which
unfortunately
encounter
a
formidable
challenge
obtain
simultaneous
improvement
of
NRA
activity
selectivity.
Here,
novel
general
strategy
is
reported
achieve
efficient
selective
catalysis
on
conjugated
coordination
polymers
featuring
high‐density
well‐defined
nitrogen
(N)‐coordinated
via
precise
regulation
N‑heterocyclic
ligands
toward
accelerating
the
hydrogenation
kinetics
necessitated
in
pathway.
Taking
cobalt
(Co)
as
example,
two
CoN
4
‐centered
polymer
electrocatalysts
(CoN
‐pyrr
‐pyri)
are
synthesized
pyrrole
pyridine
investigated
proof‐of‐concept
study.
As
revealed,
can
markedly
outperform
‐pyri
electrocatalysis.
Experimental
theoretical
results
suggest
that,
relative
N
atoms
ligand
‐pyri,
enable
faster
transfer
hydrogen
radicals
Co
active
*
NO
intermediate
at
rate‐determining
step
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
147(6), P. 5398 - 5407
Published: Jan. 31, 2025
Anion-exchange
membrane
fuel
cell
(AEMFC)
is
a
cost-effective
hydrogen-to-electricity
conversion
technology
under
zero-emission
scenario.
However,
the
sluggish
kinetics
of
anodic
hydrogen
oxidation
reaction
(HOR)
impedes
commercial
implementation
AEMFCs.
Here,
we
develop
Pd
single-atom-embedded
Ni3N
catalyst
(Pd1/Ni3N)
with
unconventional
Pd1Ni2
trimer
sites
to
drive
efficient
and
durable
HOR
in
alkaline
media.
Integrating
theoretical
experimental
analyses,
demonstrate
that
dual
achieve
"*H
on
Pd1Ni2-HV
+
*OH
Pd1Ni2-HN"
adsorption
mode,
effectively
weakening
overstrong
*H
adsorptions
pristine
Ni3N.
Owing
unique
coordination
mode
atomically
dispersed
catalytic
sites,
resulting
Pd1/Ni3N
delivers
high
intrinsic
mass
activity
together
excellent
antioxidation
capability
CO
tolerance.
Specifically,
reaches
7.54
A
mgPd-1
at
overpotential
50
mV.
The
AEMFC
employing
as
anode
displays
power
density
31.7
W
an
ultralow
precious
metal
loading
only
0.023
mgPd
cm-2.
This
study
provides
guidance
for
design
high-performance
atomic
level.
ACS Applied Materials & Interfaces,
Journal Year:
2025,
Volume and Issue:
17(9), P. 14025 - 14035
Published: Feb. 20, 2025
The
assembly
of
diverse
active
materials
significantly
enhances
the
efficiency
electrocatalytic
hydrogen
evolution
reaction
(HER).
Herein,
we
prepare
a
three-phase
composite
structure
electrocatalyst
on
carbonized
wood,
in
which
molybdenum
carbide
and
phosphide
are
attached
to
sulfide
nanosheets
(MoS2-MoP-Mo2C@CW)
through
hydrothermal
method
combination
with
high-temperature
calcination
for
pH-universal
HER.
MoS2
possesses
abundant
unsaturated
coordination
edge
sites,
thus
facilitating
adsorption
desorption
intermediate
(H*).
synergistic
effect
between
MoS2,
MoP
featuring
favorable
electronic
conductivity,
Mo2C
holding
strong
H*
catalytic
activity
Moreover,
wood
hierarchical
porous
aligned
microchannels
accelerates
mass
transport
during
As
result,
molybdenum-based
self-supported
electrode
exhibits
outstanding
HER
performance
low
overpotentials
46,
84,
65
mV
achieve
current
density
10
mA
cm-2
corresponding
Tafel
slopes
57,
111
mV,
63
dec-1
alkaline,
neutral,
acidic
environments,
respectively.
MoS2-MoP-Mo2C@CW
also
shows
long-term
durability
200
h
over
broad
pH
range
at
cm-2.
This
work
provides
an
effective
strategy
development
multiphase
wood-based
electrocatalysts
Nano Letters,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 6, 2025
Water
dissociation
in
anion
exchange
membrane
water
electrolysis
(AEMWE)
faces
significant
energy
barriers,
posing
a
challenge
for
reducing
cell
voltage.
Herein,
we
engineered
CoP
nanosheets
by
doping
Er
and
hybridizing
with
NiCoP
to
optimize
local
electronic
states
accelerate
H2O
during
the
hydrogen
evolution
reaction.
The
resulting
Er0.1-CoP/NiCoP
catalyst
achieves
low
overpotential
of
154
mV
at
-500
mA
cm-2
1.0
M
KOH.
An
AEM
electrolyzer
comprising
an
Er0.1-CoP/NiCoP@NF
cathode
demonstrates
voltage
1.672
V
stability
exceeding
1000
h
500
(50
°C).
Characterization,
density
functional
theory
(DFT)
calculations,
ab
initio
molecular
dynamics
(AIMD)
simulations
reveal
that
hybridization
synergistically
modulate
charge
distribution
across
multisites,
shifting
p-band
centers
away
from
Fermi
level.
These
adjustments
free
H*
adsorption
(ΔGH*)
improve
OH*/H2O*
adsorption,
thereby
facilitating
H2
evolution.
