Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 25, 2024
Engineering
microstructures
of
Pt
and
understanding
the
related
catalytic
mechanism
are
critical
to
optimizing
performance
for
hydrogen
evolution
reaction
(HER).
Herein,
dispersion
coordination
precisely
regulated
on
hierarchical
nitrogen-doped
carbon
nanocages
(hNCNCs)
by
a
thermal-driven
migration,
from
edge-hosted
Pt–N2Cl2
single
sites
in
initial
Pt1/hNCNC-70
°C
catalyst
clusters/nanoparticles
back
in-plane
Pt–NxC4–x
sites.
Thereinto,
presents
optimal
HER
activity
(6
mV@10
mA
cm–2)
while
shows
poor
(321
due
their
different
coordination.
Operando
characterizations
demonstrate
that
low-coordinated
Pt–N2
intermediates
derived
under
working
condition
real
active
HER,
which
enable
multi-H
adsorption
with
an
ideal
H*
energy
nearly
0
eV,
thereby
high
activity,
as
revealed
theoretical
calculations.
In
contrast,
high-coordinated
only
allow
single-H
positive
low
activity.
Accordingly,
ultralow
loading
25
μgPt
cm–2,
proton
exchange
membrane
water
electrolyzer
assembled
using
cathodic
achieves
industrial-level
current
density
1.0
A
cm–2
at
cell
voltage
1.66
V
durability,
showing
great
potential
applications.
Advanced Energy Materials,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 29, 2024
Abstract
Zn‐Co/air
hybrid
batteries
showcase
enhanced
energy
efficiency,
power
density,
and
stability
compared
to
Zn‐air
batteries.
Nevertheless,
it
remains
challenging
fabricate
multi‐functional
cathode
materials
with
fast
reaction
kinetics.
Herein
the
synthesis
of
a
wheat‐like
composed
“cereal‐grains”
densely
arranged
Co/Co
2
P
heterostructures
grown
on
“central
stems”
P/N
codoped
carbon
nanofibers
(denoted
as
P@PNCF)
is
presented.
The
biomimetic
nanostructures
not
only
offer
abundant
exposed
active
sites
maximize
accessibility
but
also
establish
efficient
multi‐channel
networks
for
both
electron
transfer
O
/OH
−
diffusion.
Furthermore,
species
high‐valent
Co,
resulting
from
self‐reconstruction
heterojunction
during
first
cycle,
create
Co
2+
↔
4+
redox
pairs
provide
additional
charging‐discharging
voltage
plateaus.
In
situ
Raman
spectroscopy
measurement
combined
ex
X‐ray
diffraction
evidence
supports
reversible
process
3+/4+
x
(OH)
y
K
2+/3+
,
leading
improved
efficiency
durability
battery.
As
result,
battery
based
P@PNCF
exhibits
remarkable
density
(321
mW
cm
−2
),
ultralong
cycle
(700
h),
large
(62%
at
20
mA
).
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 27, 2025
Widely
used
catalysts
for
electrocatalytic
hydrogen
(H2)
evolution
reaction
(HER)
have
high
platinum
(Pt)
contents
and
show
low
efficiencies
in
neutral
alkaline
solutions.
Herein,
a
carbon
nanotube
(CNT)
supported
Pt
catalyst
(Pt/CNT45)
with
1
wt.%
is
fabricated.
For
HER,
the
mass
activity
of
Pt/CNT45
acidic
(18.76
A
mgPt
-1),
(3.92
(3.88
-1)
solutions
respectively
much
higher
than
those
on
commercial
Pt/C
20
(acidic:
0.31
-1,
neutral:
0.03
alkaline:
0.07
-1).
Thus,
enhances
HER
not
only
but
also
Ptδ+
at
Pt-CNT
interface
promotes
water
(H2O)
dissociation
hydroxyl
(OH)
desorption
from
Pt/CNT45,
thus
enhancing
HER.
This
work
opens
new
way
wider
pH
range
by
content,
helpful
commercialization.
Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 11, 2025
Abstract
Transition
metal
and
oxide
heterojunctions
have
been
widely
studied
as
bifunctional
oxygen
reduction/evolution
reaction
(ORR/OER)
electrocatalysts
for
Zn‐air
batteries,
but
the
dynamic
changes
of
transition
oxides
interface
during
catalysis
are
still
unclear.
Here,
electrocatalyst
Co─Co
2
Nb
5
O
14
is
reported,
containing
lattice
interlocked
Co
nanodots
nanorods,
which
construct
a
strong
metal‐support
interaction
(SMSI)
interface.
Unlike
recognition
that
metals
mainly
serve
ORR
active
sites
OER
sites,
it
found
both
ORR/OER
originate
from
,
while
acts
an
electronic
regulatory
unit.
The
SMSI
promotes
electron
transfer
between
Co/Co
reversible
4+
/Nb
5+
realize
bidirectional
adsorption/migration
intermediates,
thereby
achieving
reconstitution.
shows
high
half‐wave
potential
0.84
V,
low
overpotential
296.3
mV,
great
cycling
stability
over
30000
s.
ZAB
capacity
850.6
mA
h·gZn
−1
can
stably
run
2050
cycles
at
10
mA·cm⁻
.
Moreover,
constructed
solid‐state
also
leading
in
comparison
with
previous
studies.
Catalysts,
Journal Year:
2025,
Volume and Issue:
15(3), P. 278 - 278
Published: March 16, 2025
Developing
cost-effective
and
high-performance
non-precious
metal-based
electrocatalysts
for
hydrogen
evolution
reaction
is
of
crucial
importance
toward
sustainable
energy
systems.
Herein,
we
prepare
a
novel
hybrid
electrode
featuring
intermetallic
Fe2Mo
nanoparticles
anchored
on
the
hierarchical
nanoporous
copper
skeleton
as
robust
electrocatalyst
by
simple
scalable
alloying
dealloying
methods.
By
virtue
highly
active
unique
bicontinuous
facilitating
ion/molecule
transportation,
Fe2Mo/Cu
shows
excellent
electrocatalysis,
with
low
Tafel
slope
(~71
mV
dec−1)
to
realize
ampere-level
current
density
1
A
cm−2
at
overpotential
~200
in
M
KOH
electrolyte.
Furthermore,
exhibits
long−term
stability
exceeding
400
h
maintain
~250
mA
an
150
mV.
Such
outstanding
electrocatalytic
performance
enables
be
attractive
catalyst
water
splitting
economy.
Advanced Science,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 3, 2025
The
deployment
of
high-performance
catalysts
and
the
acceleration
anodic
reaction
kinetics
are
key
measures
to
achieve
maximum
energy
efficiency
in
overall
water
electrolysis
hydrogen
production
systems.
Here,
an
innovative
strategy
is
developed
by
directly
constructing
a
supramolecular
framework
embedded
with
boron
clusters
cucurbituril
as
reducing
agent.
This
approach
enabled
situ
conversion
Pt⁴⁺
into
highly
dispersed,
small-sized
nano-platinum,
which
subsequently
distributed
on
boron-carbon-nitrogen
(BCN)
matrix.
resulting
Pt/BNHCSs
catalyst
demonstrates
ability
facilitate
electrocatalytic
splitting
for
across
multiple
scenarios
while
simultaneously
accelerating
methanol
oxidation
kinetics,
significantly
outperforming
commercial
Pt/C
various
aspects.
cathodic
evolution-anodic
coupling
system
constructed
using
greatly
reduces
consumption
system.
In
attenuated
total
reflection
Fourier
transform
infrared
online
differential
electrochemical
mass
spectrometry
reveals
that
interface
enhances
H₂O
adsorption
promotes
CH₃OH→CO
process,
density
functional
theory
calculations
indicated
BCN
support
facilitated
evolution
H₂
CH₃OH
CO,
elucidating
mechanism
promoted
oxidation.
Advanced Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: April 11, 2025
Abstract
Atop
and
multiple
adsorbed
hydrogen
are
considered
as
key
intermediates
on
Pt‐group
metal
for
acidic
evolution
reaction
(HER),
yet
the
role
of
bridge
intermediate
(
*
H
)
is
consistently
overlooked
experimentally.
Herein,
a
Pt
atomic
chain
modified
fcc
‐Ru
nanocrystal
(Pt–Ru(
))
developed
with
co‐crystalline
structure,
featuring
bonded
Pt–Ru
pair
site.
Electrons
leap
from
site
to
facilitate
desorption,
thus
accelerating
Tafel
kinetics
ensuring
outstanding
electrocatalytic
performance,
low
overpotential
(4.0
mV
at
10
mA
cm
−2
high
turnover
frequency
(56.4
2
s
−1
50
mV).
Notably,
proton
exchange
membrane
water
electrolyzer
PEMWE
ultra‐low
loading
ug
shows
excellent
activity
(1.61
V
1.0
A
average
degradation
rate
µV
h
over
1000
h),
significantly
outperforming
benchmark
Pt/C.
Furthermore,
PEMWE‐based
80
µm
Gore
under
identical
operating
conditions
requires
only
1.54
1.58
achieve
1.5
.
This
finding
highlights
interface
in
obtaining
HER
intrinsic
underscores
transformative
potential
designing
next‐generation
bimetallic
catalysts
clean
energy.
