Environmental Science & Technology, Journal Year: 2025, Volume and Issue: unknown
Published: April 15, 2025
Pyrogenic
carbons
(PCs)
are
important
mediators
of
biogeochemical
redox
reactions
and
contribute
to
contaminant
degradation
in
some
remediation
methods.
Contaminant
by
electron
transfer
from
PC
is
influenced
its
conductivity
storage
capacity,
atom
involving
atomic
hydrogen,
but
resolving
their
contributions
difficult.
In
this
study,
we
developed
a
method
modify
working
electrodes
with
agarose-stabilized
thin
films
PCs
used
them
characterize
reactivity
using
2,4,6-trinitrotoluene
(TNT)
as
model
several
electrochemical
Chronoamperometry
showed
that
TNT
reduction
rates
increase
increasing
temperature,
impedance
spectroscopy
because
the
heterogeneous
rate
constants
(k0)
inversely
correlated
resistivity
(Rp)
films.
As
result,
like
biochars,
which
have
higher
charge
resistance
(Rct),
give
lower
rates,
whereas
Rct
activated
faster
reduction.
Current
H2O/H+
H2
(HER)
was
significant
only
for
low
Rp
PC-films
on
Pt
electrodes.
The
reactive
intermediates
involved
HER
react
preferentially
quinonoid
moieties
PC,
thereby
competing
limiting
at
overpotentials
(
Language: Английский