Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Июль 13, 2024
Abstract
Challenges
in
direct
catalytic
oxidation
of
biomass-derived
aldehyde
and
alcohol
into
acid
with
high
activity
selectivity
hinder
the
widespread
biomass
application.
Herein,
we
demonstrate
that
a
Pd/Ni(OH)
2
catalyst
abundant
Ni
2+
-O-Pd
interfaces
allows
electrooxidation
5-hydroxymethylfurfural
to
2,
5-furandicarboxylic
near
100
%
yield
97.3%
at
0.6
volts
(versus
reversible
hydrogen
electrode)
1
M
KOH
electrolyte
under
ambient
conditions.
The
rate-determining
step
intermediate
5-hydroxymethyl-2-furancarboxylic
is
promoted
by
increased
OH
species
low
C–H
activation
energy
barrier
interfaces.
Further,
prevent
agglomeration
Pd
nanoparticles
during
reaction,
greatly
improving
stability
catalyst.
In
this
work,
can
achieve
100%
conversion
>90%
flow-cell
work
stably
over
200
h
fixed
cell
voltage
0.85
V.
Chemical Reviews,
Год журнала:
2023,
Номер
123(11), С. 7119 - 7192
Опубликована: Фев. 7, 2023
Since
severe
global
warming
and
related
climate
issues
have
been
caused
by
the
extensive
utilization
of
fossil
fuels,
vigorous
development
renewable
resources
is
needed,
transformation
into
stable
chemical
energy
required
to
overcome
detriment
their
fluctuations
as
sources.
As
an
environmentally
friendly
efficient
carrier,
hydrogen
can
be
employed
in
various
industries
produced
directly
(called
green
hydrogen).
Nevertheless,
large-scale
production
water
electrolysis
prohibited
its
uncompetitive
cost
a
high
specific
demand
electricity
expenses,
which
enhancing
corresponding
thermodynamics
kinetics
at
elevated
working
temperatures.
In
present
review,
effects
temperature
variation
are
primarily
introduced
from
perspective
cells.
Following
increasing
order
temperature,
multidimensional
evaluations
considering
materials
structures,
performance,
degradation
mechanisms
mitigation
strategies
well
stacks
systems
presented
based
on
alkaline
cells
polymer
electrolyte
membrane
(ET-AECs
ET-PEMECs),
ionic
conductors
(ET-ICs),
protonic
ceramic
(PCECs)
solid
oxide
(SOECs).
ACS Nano,
Год журнала:
2023,
Номер
17(2), С. 1701 - 1712
Опубликована: Янв. 9, 2023
The
scalable
production
of
inexpensive,
efficient,
and
robust
catalysts
for
oxygen
evolution
reaction
(OER)
that
can
deliver
high
current
densities
at
low
potentials
is
critical
the
industrial
implementation
water
splitting
technology.
Herein,
a
series
metal
oxides
coupled
with
Fe
Advanced Materials,
Год журнала:
2023,
Номер
36(7)
Опубликована: Сен. 14, 2023
Hydrogen
production
from
electrolytic
water
electrolysis
is
considered
a
viable
method
for
hydrogen
with
significant
social
value
due
to
its
clean
and
pollution-free
nature,
high
efficiency,
purity,
but
the
anode
oxygen
evolution
reaction
(OER)
process
complex
kinetically
slow.
Single-atom
catalysts
(SACs)
100%
atom
utilization
homogeneous
active
sites
often
exhibit
catalytic
activity
are
expected
be
extensively
applied.
The
performance
of
OER
can
further
improved
by
precise
regulation
structure
through
electronic
effects,
coordination
environment,
heteroatomic
doping,
so
on.
In
this
review,
mechanisms
under
different
conditions
introduced,
latest
research
progress
SACs
in
field
systematically
summarized,
then
effects
various
structural
strategies
on
discussed,
principles
ideas
design
proposed.
end,
outstanding
issues
current
challenges
summarized.
Abstract
Electrochemical
water
splitting
represents
a
promising
technology
for
green
hydrogen
production.
To
design
advanced
electrocatalysts,
it
is
crucial
to
identify
their
active
sites
and
interpret
the
relationship
between
structures
performance.
Materials
extensively
studied
as
electrocatalysts
include
noble‐metal‐based
(e.g.,
Ru,
Ir,
Pt)
non‐noble‐metal‐based
3d
transition
metals)
compounds.
Recently,
advancements
in
characterization
techniques
theoretical
calculations
have
revealed
novel
unusual
sites.
The
present
review
highlights
latest
achievements
discovery
identification
of
various
unconventional
electrochemical
splitting,
with
focus
on
state‐of‐the‐art
strategies
determining
true
establishing
structure–activity
relationships.
Furthermore,
we
discuss
remaining
challenges
future
perspectives
development
next‐generation
By
presenting
fresh
perspective
reaction
involved
this
aims
provide
valuable
guidance
study
industrial
applications.
image
Advanced Materials,
Год журнала:
2024,
Номер
36(14)
Опубликована: Янв. 3, 2024
Abstract
Despite
of
urgent
needs
for
highly
stable
and
efficient
electrochemical
water‐splitting
devices,
it
remains
extremely
challenging
to
acquire
oxygen
evolution
reaction
(OER)
electrocatalysts
under
harsh
industrial
conditions.
Here,
a
successful
in
situ
synthesis
FeCoNiMnCr
high‐entropy
alloy
(HEA)
oxide
(HEO)
heterocatalysts
via
Cr‐induced
spontaneous
reconstruction
strategy
is
reported,
demonstrated
that
they
deliver
excellent
ultrastable
OER
electrocatalytic
performance
with
low
overpotential
320
mV
at
500
mA
cm
−2
negligible
activity
loss
after
maintaining
100
240
h.
Remarkably,
the
heterocatalyst
holds
outstanding
long‐term
stability
condition
6
m
KOH
85
°C
current
density
as
high
over
Density
functional
theory
calculations
reveal
formation
HEA‐HEO
heterostructure
can
provide
electroactive
sites
possessing
robust
valence
states
guarantee
process,
leading
enhancement
electroactivity.
The
findings
such
conditions
offer
new
perspective
designing
constructing
practical
water
splitting.
Abstract
The
generation
of
green
hydrogen
by
water
splitting
is
identified
as
a
key
strategic
energy
technology,
and
proton
exchange
membrane
electrolysis
(PEMWE)
one
the
desirable
technologies
for
converting
renewable
sources
into
hydrogen.
However,
harsh
anode
environment
PEMWE
oxygen
evolution
reaction
(OER)
involving
four‐electron
transfer
result
in
large
overpotential,
which
limits
overall
efficiency
production,
thus
efficient
electrocatalysts
are
needed
to
overcome
high
overpotential
slow
kinetic
process.
In
recent
years,
noble
metal‐based
(e.g.,
Ru/Ir‐based
metal/oxide
electrocatalysts)
have
received
much
attention
due
their
unique
catalytic
properties,
already
become
dominant
acidic
OER
process
applied
commercial
devices.
these
still
face
thorny
problem
conflicting
performance
cost.
this
review,
first,
metal
briefly
classified
according
forms
existence,
mechanisms
outlined.
Then,
focus
on
summarizing
improvement
strategies
with
respect
activity
stability
over
years.
Finally,
challenges
development
prospects
discussed.
Exploiting
highly
active
and
bifunctional
catalysts
for
both
hydrogen
evolution
reaction
(HER)
hydrazine
oxidation
(HzOR)
is
a
prerequisite
the
acquisition.
High-entropy
materials
have
received
widespread
attention
in
catalysis,
but
high-performance
electrodes
are
still
lacking.
Herein,
novel
P-modified
amorphous
high-entropy
CoFeNiCrMn
compound
developed
on
nickel
foam
(NF)
by
one-step
electrodeposition
strategy.
The
achieved
CoFeNiCrMnP/NF
delivers
remarkable
HER
HzOR
performance,
where
overpotentials
as
low
51
268
mV
realized
at
100
mA
cm-2
.
improved
cell
voltage
of
91
further
demonstrated
assessing
constructed
hydrazine-assisted
water
electrolyser,
which
almost
1.54
V
lower
than
HER||OER
system.
Experimental
results
confirm
important
role
each
element
regulating
bifuncational
performance
catalysts.
main
influencing
elements
seem
to
be
Fe
Ni
HER,
while
P-modification
Cr
metal
may
contribute
lot
HzOR.
These
synergistic
advantages
help
energy
barriers
improve
kinetics,
resulting
excellent
activity
CoFeNiCrMnP/NF.
work
offers
feasible
strategy
develop
self-supporting
electrode
with
overall
splitting.
Advanced Functional Materials,
Год журнала:
2023,
Номер
33(51)
Опубликована: Авг. 8, 2023
Abstract
The
harsh
operating
conditions
of
the
oxygen
evolution
reaction
(OER)
in
water
electrolysis
severely
degrade
activity
and
stability
electrocatalysts
due
to
elemental
leaching
or
particle
agglomeration.
Therefore,
it
is
crucial
incorporate
support
materials
that
effectively
immobilize
catalyst
particles
for
developing
efficient
OER
catalysts.
This
review
aims
highlight
role
MXene
as
a
material
improve
performance
First,
extended
mechanism
briefly
described
terms
effect
on
Then,
various
synthesis
methods
catalyst‐MXene
compounds
are
introduced,
important
properties
beneficial
performances
discussed.
electrocatalytic
results
enhanced
catalysts
effective
also
summarized.
Finally,
future
challenges
prospects
proposed
utilizing
an
excellent
electrocatalysis.
