Abstract
Developing
high
performance
and
cost‐effective
electrocatalysts
toward
oxygen
reduction
reaction
(ORR)
is
of
critical
significance
for
fuel
cells
metal–air
batteries.
Herein,
CoO@Co
nanoparticles
encapsulated
in
three‐dimensional
(3D)
porous
nitrogen‐doped
carbon
(CoO@Co/Co‐N‐C)
have
been
successfully
derived
from
the
cobalt–tannin
framework
via
NH
4
Cl
salt
template
strategy.
Owing
to
generated
3
HCl
gas
during
pyrolysis
process,
CoO@Co/Co‐N‐C
formed
a
3D
architecture
with
ultrahigh‐specific
surface
area
(1052.5
m
2
g
−1
).
This
hybrid
catalyst
exhibits
comparable
ORR
catalytic
activity,
as
well
superior
stability
20
wt%
Pt/C
alkaline
conditions.
finding
offers
novel
facile
strategy
synthesize
non‐precious
metal
energy
conversion
storage
applications.
Abstract
Developing
high
performance
and
cost‐effective
electrocatalysts
toward
oxygen
reduction
reaction
(ORR)
is
of
critical
significance
for
fuel
cells
metal–air
batteries.
Herein,
CoO@Co
nanoparticles
encapsulated
in
three‐dimensional
(3D)
porous
nitrogen‐doped
carbon
(CoO@Co/Co‐N‐C)
have
been
successfully
derived
from
the
cobalt–tannin
framework
via
NH
4
Cl
salt
template
strategy.
Owing
to
generated
3
HCl
gas
during
pyrolysis
process,
CoO@Co/Co‐N‐C
formed
a
3D
architecture
with
ultrahigh‐specific
surface
area
(1052.5
m
2
g
−1
).
This
hybrid
catalyst
exhibits
comparable
ORR
catalytic
activity,
as
well
superior
stability
20
wt%
Pt/C
alkaline
conditions.
finding
offers
novel
facile
strategy
synthesize
non‐precious
metal
energy
conversion
storage
applications.
