Catalysts,
Journal Year:
2024,
Volume and Issue:
14(8), P. 491 - 491
Published: July 31, 2024
Tuning
the
chemical
and
structural
environment
of
Ru-based
nanomaterials
is
a
major
challenge
for
achieving
active
stable
hydrogen
evolution
reaction
(HER)
electrocatalysis.
Here,
we
anchored
ultrafine
Ru
nanoparticles
(with
size
~4.2
nm)
on
hierarchical
Ni2P
array
(Ru/Ni2P)
to
enable
highly
efficient
HER.
The
promoter
weakened
adsorption
proton
sites
by
accepting
electrons
from
nanoparticles.
Moreover,
endowed
catalysts
with
large
surface
area
open
structure.
Consequently,
as-fabricated
Ru/Ni2P
electrode
displayed
low
overpotential
57
164
mV
at
HER
current
densities
10
50
mA
cm−2,
respectively,
comparable
state-of-the-art
Pt
catalysts.
can
operate
stably
96
h
cm−2
without
performance
degradation.
After
pairing
commercial
RuO2
anode,
anode
catalyzed
overall
water
splitting
1.73
V
density
which
was
0.16
lower
than
its
Ni
counterpart.
In
situ
Raman
studies
further
revealed
optimized
Ru-active
promoter,
thus
enhancing
electrocatalytic
performance.
Journal of the American Chemical Society,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 8, 2025
Electrochemical
H2
production
from
water
favors
low-voltage
molecular
oxidation
to
replace
the
oxygen
evolution
reaction
as
an
energy-saving
and
value-added
approach.
However,
there
exists
a
mismatch
between
high
demand
for
slow
anodic
reactions,
restricting
practical
applications
of
such
hybrid
systems.
Here,
we
propose
bipolar
approach,
with
generation
N–N
oxidatively
coupled
dehydrogenation
(OCD)
3,5-diamino-1H-1,2,4-triazole
(DAT),
in
addition
cathodic
generation.
The
system
requires
relatively
low
potentials
0.872
1.108
V
vs
RHE
reach
10
500
mA
cm–2,
respectively.
H-type
electrolyzer
only
0.946
1.129
deliver
100
respectively,
electricity
consumption
(1.3
kWh
per
m3
H2)
reduced
by
68%,
compared
conventional
splitting.
Moreover,
process
is
highly
appealing
due
absence
traditional
hazardous
synthetic
conditions
azo
compounds
at
anode
crossover/mixing
H2/O2
electrolyzer.
A
flow-type
operates
stably
cm–2
300
h.
Mechanistic
studies
reveal
that
Pt
single
atom
nanoparticle
(Pt1,n)
optimize
adsorption
S
active
sites
over
Pt1,n@VS2
catalysts.
At
anode,
stepwise
−NH2
DAT
then
oxidative
coupling
−N–N–
predominantly
form
while
generating
H2.
present
report
paves
new
way
atom-economical
aminotriazole
green
electrosynthesis
chemicals.
Advanced Functional Materials,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 2, 2025
Abstract
Atomically
dispersed
materials
have
been
a
thriving
research
field
due
to
their
maximum
atomic
utilization
and
remarkable
performance
in
energy
conversion
storage
systems.
Owing
the
large
radius,
strong
oxophilicity,
unique
electronic
properties,
rare‐earth
(RE)
elements
widely
investigated
as
oxide
carriers
promoters
atomically
manipulate
regulate
structure
of
active
species.
Single‐atom
state
with
an
adjustable
coordination
environment
on
N‐doped
carbon
endows
RE
metals
special
states
outstanding
catalytic
performances.
A
thorough
comprehension
modulation
mechanism
paves
way
for
construction
advanced
RE‐based
electrocatalysts
high
activity,
stability,
selectivity.
This
review
provides
widespread
insight
into
roles
modulating
properties
combined
structure–performance
relationship
electrocatalysis
processes.
The
characteristic
physical
chemical
are
highlighted,
synthetic
strategy
is
discussed.
Finally,
summary
perspectives
rational
design
development
highly
efficient
catalysts
proposed.
aims
provide
guideline
promoting
effective
functional
materials.
Small,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 2, 2025
Tailoring
the
local
environment
of
catalyst
surface
has
emerged
as
an
effective
strategy
to
enhance
reaction
kinetics
involving
multiple
intermediates.
For
hydrogen
evolution
reactions
(HER),
driving
factors
for
aggregation
and
migration
which
are
poorly
understood
in
depth
affects
especially
over
a
wide
pH
range.
Inspired
by
selectivity
microenvironment
intermediates,
interfacial
electrocatalyst
composed
Ru
ultrafine
nanocatalysts
anchored
onto
monolayer
amorphous
(a-WCoNiO)
nanosheets
with
electron-rich
induced
organic
oleylamine
ligand
is
designed
realize
high-performance
pH-universal
HER.
This
Ru/a-WCoNiO
possesses
impressively
low
overpotentials
-13,
-14,
-14
mV
at
10
mA
cm-2
0.5
m
H2SO4,
1
KOH
PBS,
respectively,
ranking
among
best
HER
catalysts
reported
date.
Benefiting
from
microenvironment,
exhibits
record-high
turnover
frequency
(TOF)
mass
activity
(MA),
more
than
47.9
times
higher
that
commercial
20%
Pt/C.
Importantly,
other
precious
metals
loaded
on
a-WCoNiO
enhancing
their
current
density
It
believed
this
developed
approach
modifiers
tailored
practical
significance
advantages
designing
catalysts.
