Exploring electrocatalysts with satisfactory
activity and durability
has remained a long-lasting target for electrolyzing water, which
is particularly significant for sustainable hydrogen fuel production.
Here, we report a quaternary B/P-codoped transition metal Co-Mo hybrid
as an efficient alternative catalyst for overall water splitting.
The Co-Mo-B-P/CF dual nanowafers were deposited on a copper foam by
double-pulse electrodeposition, which is favorable for achieving a
nanocrystalline structure. The Co-Mo-B-P/CF catalyst shows a high
catalytic activity along with good long-term stability in 1.0 M KOH
solutions for both the hydrogen and oxygen evolution reactions, requiring
48 and 275 mV to reach 10 mA cm–2, respectively.
The synergetic effect between Co-Mo and doped B and P elements is
mainly attributed to the excellent bifunctional catalysis performance,
while the dual-nanowafer structure endows Co-Mo-B-P with numerous
catalytical active sites enhancing the utilization efficiency of atoms.
Moreover, the catalytic capability of Co-Mo-B-P/CF as a bifunctional
electrocatalyst for the overall water splitting is proved, with the
current density of 10 mA cm–2 accomplished at 1.59
V. After the stability test for overall water splitting at 1.59 V
for 24 h, the activity almost remains unchanged. The features of excellent
electrocatalytic activity, simple preparation, and inexpensive raw
materials for Co-Mo-B-P/CF as a bifunctional catalyst hold great potentials
for overall water splitting.
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