Perfluoroisobutyronitrile
(C4F7N),
an
eco-friendly
insulating
gas,
has
been
extensively
utilized
in
diverse
gas-insulated
equipment
(GIE)
to
replace
the
most
potent
greenhouse
gas
SF6.
Nonetheless,
given
low
toxicity
of
C4F7N,
potential
leakage
risk
at
a
high-pressure
operational
environment
cannot
be
overlooked,
making
development
highly
sensitive
sensors
for
leak
detection
essential.
Herein,
Co3O4
was
selected
as
specific
sensing
material
C4F7N
based
on
density
functional
theory
screening.
The
Co3O4-based
sensor
prepared,
and
its
response
performance
systematically
evaluated.
interaction
mechanism
between
also
examined
by
oxygen
vacancy
theory.
demonstrates
limit
0.15
ppm
optimal
operating
temperature
300
°C,
exhibiting
exceptional
selectivity
repeatability,
with
stability
time
55.5
s
recovery
1478
s.
sensor's
application
under
actual
working
settings
validated
using
simulated
test.
Relevant
results
provide
guidance
monitoring
C4F7N-based
GIE.
Schematic
of
functional
materials
for
electrochemical
sensors,
showcasing
MWCNTs,
CNFs,
GO,
Pd,
Pt,
Ni,
Fe,
Co,
COFs,
MOFs
detecting
heavy
metal
ions
(Pb,
Cd,
Hg,
Cu,
Cr,
As)
in
complex
environments
with
high
sensitivity
and
reliability.
