Abstract
H
2
generation
from
methanol‐water
mixtures
often
requires
high
pressure
and
temperature
(200–300
°C).
However,
CO
can
be
easily
generated
poison
the
catalytic
system
under
such
temperature.
Therefore,
it
is
highly
desirable
to
develop
efficient
systems
for
production
methanol
at
room
temperature,
even
sub‐zero
temperatures.
Herein,
carbon
nanotube‐supported
Pt
nanocomposites
are
designed
synthesized
as
high‐performance
nano‐catalysts,
via
stabilization
of
nanoparticles
onto
nanotube
(CNT),
upon
dehydrogenation
Therein,
optimal
Pt/CNT
nanocomposite
presents
superior
performance
in
expense
B
(OH)
4
,
with
TOF
299.51
min
‐1
30
o
C.
Compared
other
common
carriers,
exhibited
highest
production,
emphasizing
critical
role
CNT
dehydrogenation.
The
confinement
by
CNTs
conducive
inhibiting
aggregation
nanoparticles,
thereby
significantly
increasing
its
stability.
kinetic
study,
detailed
mechanistic
insights,
density
functional
theory
(DFT)
calculation
confirm
that
breaking
O─H
bond
CH
3
OH
rate‐controlling
step
dehydrogenation,
both
atoms
supplied
methanol.
Interestingly,
also
successfully
produced
−10
°C,
which
absolutely
solves
freezing
problem
evolution
water‐splitting
reaction.
ACS Applied Nano Materials,
Год журнала:
2023,
Номер
7(1), С. 1138 - 1145
Опубликована: Дек. 20, 2023
Integrating
metal-based
species
with
a
carbon
matrix
is
promising
approach
for
fabricating
inexpensive,
durable,
and
efficient
electrocatalysts.
Herein,
NiSe2-decorated
N-doped
polyhedra
(NC)
are
prepared
as
electrocatalysts
hydrogen
evolution
reaction
(HER)
by
template-assisted
approach.
The
optimal
NC-NiSe2
delivers
extraordinary
catalytic
activities
toward
HER
in
wide
pH
range,
overpotentials
of
127
mV
0.5
M
H2SO4,
226
1
PBS,
205
KOH
to
drive
current
density
10
mA
cm–2.
In
addition,
this
catalyst
undergoes
fast
kinetics
via
Volmer–Heyrovsky
mechanism
exhibits
excelent
long-term
durability
48
h
the
full
media.
During
electrocatalysis,
when
electrons
pass
through
NC
surface
NiSe2
particles,
water
molecules
at
active
sites
reduced,
then
released.
excellent
activity
mainly
benefit
from
hierarchically
porous
architecture
well
synergistic
interaction
nanoparticles
matrix,
which
not
only
significantly
boost
electronic
conductivity
generate
plentiful
but
also
guarantee
chemical
structural
stabilities
species.
This
work
unravels
deep
insights
into
exploration
carbon-supported
metal
chalcogenides
highly
full-pH
values.
Separation and Purification Technology,
Год журнала:
2023,
Номер
316, С. 123764 - 123764
Опубликована: Апрель 5, 2023
Large
amounts
of
diverse
colored
synthetic
organic
dyes
are
discharged
from
industrial
effluents
in
the
environment
causing
non-esthetic
pollution
and
serious
health-risk
problems.
Dyes
very
stable
upon
solar
irradiation,
temperature,
biological
treatment,
then
being
non-removed
conventional
wastewater
treatment
plants.
The
decontamination
dyeing
by
potent
methods
has
received
increasing
attention
over
last
years,
showing
a
marked
relevance
electrochemical
Fenton-based
processes
consisting
H2O2
electro-generation
its
catalytic
decomposition
with
Fe2+
to
form
∙OH.
This
paper
presents
comprehensive
review
these
period
2018–2022
dealing
discoloration
mineralization
solutions
real
wastewaters
single
or
mixed
dyes.
Homogeneous
electro-Fenton
(EF),
heterogeneous
EF
solid
catalysts
functionalized
cathodes,
photoelectro-Fenton
(PEF),
microbial
fuel
cells,
other
hybrid
adsorption,
nanofiltration,
electro-peroxone,
photoelectrocatalysis,
sequential
electrocoagulation
sonication
summarized.
principles
explained
understand
role
oxidizing
agents
generated.
accumulation
at
pH
3.0
is
described
cathodes
raw
modified
carbonaceous
materials
as
well
gas-diffusion
electrodes,
effect
anode,
electrolyte
composition,
applied
current
density
cathodic
potential,
dye
contents
on
homogeneous
performance
discussed.
Rapid
much
slower
were
found
EF.
Similar
behavior
was
obtained
for
EF,
although
allowed
operating
more
neutral
without
sludge
precipitation.
removal
improved
PEF
(SPEF)
due
positive
photolysis
Fe(III)
species
UVA
light
sunlight,
respectively.
SPEF
can
be
envisaged
best
cost-effective
destruction.
Advanced Materials,
Год журнала:
2024,
Номер
36(25)
Опубликована: Март 8, 2024
Abstract
Non‐noble
transition
metal
(TM)‐based
compounds
have
recently
become
a
focal
point
of
extensive
research
interest
as
electrocatalysts
for
the
two
electron
oxygen
reduction
(2e
−
ORR)
process.
To
efficiently
drive
this
reaction,
these
TM‐based
must
bear
unique
physiochemical
properties,
which
are
strongly
dependent
on
their
phase
structures.
Consequently,
adopting
engineering
strategies
toward
structure
has
emerged
cutting‐edge
scientific
pursuit,
crucial
achieving
high
activity,
selectivity,
and
stability
in
electrocatalytic
This
comprehensive
review
addresses
intricate
field
applied
to
non‐noble
2e
ORR.
First,
connotation
fundamental
concepts
related
kinetics
thermodynamics
succinctly
elucidated.
Subsequently,
focus
shifts
detailed
discussion
various
approaches,
including
elemental
doping,
defect
creation,
heterostructure
construction,
coordination
tuning,
crystalline
design,
polymorphic
transformation
boost
or
revive
ORR
performance
(selectivity,
stability)
catalysts,
accompanied
by
an
insightful
exploration
phase‐performance
correlation.
Finally,
proposes
fresh
perspectives
current
challenges
opportunities
burgeoning
field,
together
with
several
critical
directions
future
development
electrocatalysts.
Abstract
Hydrogen
peroxide
(H
2
O
)
is
a
highly
value‐added
and
environmental‐friendly
chemical
with
various
applications.
The
production
of
H
by
electrocatalytic
2e
−
oxygen
reduction
reaction
(ORR)
has
emerged
as
promising
alternative
to
the
energy‐intensive
anthraquinone
process.
High
selectivity
Catalysts
combining
superior
activity
are
critical
for
efficient
electrosynthesis
.
Earth‐abundant
transition
metal
selenides
(TMSs)
being
discovered
classic
stable,
low‐cost,
active
selective
catalysts
electrochemical
ORR.
These
features
come
from
relatively
large
atomic
radius
selenium
element,
metal‐like
properties
abundant
reserves.
Moreover,
compared
advanced
noble
or
single‐atom
catalysts,
kinetic
current
density
TMSs
generation
higher
in
acidic
solution,
which
enable
them
become
suitable
catalyst
candidates.
Herein,
recent
progress
ORR
systematically
reviewed.
effects
electrocatalysts
on
activity,
stability
summarized.
It
intended
provide
an
insight
design
corresponding
mechanisms
device
setup,
discuss
relationship
between
structure
activity.
Journal of Materials Chemistry A,
Год журнала:
2021,
Номер
9(46), С. 26019 - 26027
Опубликована: Янв. 1, 2021
A
Co-tetramethoxyphenylporphyrin/carbon
nanotube
hybrid
efficiently
electrocatalyzes
H
2
O
production
via
2e
−
reduction
with
an
ultrahigh
mass
activity.
The
catalytic
mechanism
is
revealed
by
in
situ
infrared
spectroscopy
and
DFT
calculations.
