ACS Sustainable Chemistry & Engineering,
Год журнала:
2022,
Номер
10(3), С. 1298 - 1315
Опубликована: Янв. 10, 2022
Increasing
pollution
and
ecological
imbalance
have
accentuated
the
need
to
develop
sensors
through
an
efficient
technique.
Typically,
core–shell
nanocrystals
of
cadmium
selenide/zinc
sulfide
(CdSe/ZnS)
with
functionalized
multiwalled
carbon
nanotubes
(f-MWCNTs)
are
used
for
developing
electrochemical
sensor
that
simultaneously
detects
4-aminophenol
(4-AP)
4-nitrophenol
(4-NP).
The
composite
network
formed
by
CdSe/ZnS
quantum
dots
f-MWCNTs
(CdSe/ZnS
QDs
@
f-MWCNT)
behaves
as
excellent
electrocatalyst
provides
a
transportation
pathway
engendering
electron–hole
pair.
exhibits
low
detection
limit
values
34.8
17.7
nM
4-AP
4-NP,
respectively.
also
showed
sensitivity
at
linear
working
range
0.149–510
μM
concentration
both
analytes.
Additionally,
study
shows
potential
commercial
feasibility
as-prepared
acquiring
satisfactory
recovery
percentage
analytes
in
real-time
biological
environmental
sample
analyses.
Chemical Reviews,
Год журнала:
2023,
Номер
123(22), С. 12507 - 12593
Опубликована: Ноя. 1, 2023
Electrocatalysis
underpins
the
renewable
electrochemical
conversions
for
sustainability,
which
further
replies
on
metallic
nanocrystals
as
vital
electrocatalysts.
Intermetallic
have
been
known
to
show
distinct
properties
compared
their
disordered
counterparts,
and
long
explored
functional
improvements.
Tremendous
progresses
made
in
past
few
years,
with
notable
trend
of
more
precise
engineering
down
an
atomic
level
investigation
transferring
into
practical
membrane
electrode
assembly
(MEA),
motivates
this
timely
review.
After
addressing
basic
thermodynamic
kinetic
fundamentals,
we
discuss
classic
latest
synthetic
strategies
that
enable
not
only
formation
intermetallic
phase
but
also
rational
control
other
catalysis-determinant
structural
parameters,
such
size
morphology.
We
demonstrate
emerging
nanomaterials
potentially
advancement
energy
electrocatalysis.
Then,
state-of-the-art
characterizations
representative
electrocatalysts
emphasis
oxygen
reduction
reaction
evaluated
a
MEA
setup.
summarize
review
by
laying
out
existing
challenges
offering
perspective
future
research
directions
toward
practicing
conversions.
High-entropy
alloy
(HEA)
nanocrystals
have
attracted
extensive
attention
in
catalysis.
However,
there
are
no
effective
strategies
for
synthesizing
them
a
controllable
and
predictable
manner.
With
quinary
HEA
made
of
platinum-group
metals
as
an
example,
we
demonstrate
that
their
structures
with
spatial
compositions
can
be
predicted
by
quantitatively
knowing
the
reduction
kinetics
metal
precursors
entropy
mixing
under
dropwise
addition
five-metal
precursor
solution.
The
time
to
reach
steady
state
each
plays
pivotal
role
determining
homogeneous
core-shell
features.
Compared
commercial
platinum/carbon
phase-separated
counterparts,
dendritic
defect-rich
surface
show
substantial
enhancement
catalytic
activity
durability
toward
both
hydrogen
evolution
oxidation.
This
quantitative
study
will
lead
paradigm
shift
design
nanocrystals,
pushing
away
from
trial-and-error
approach.
