The design of efficient and low-cost electrocatalysts for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is highly desirable for water splitting. Here, Cedoped CoP was prepared through synthesizing a Ce-ZIF-67 precursor coupled with a phosphorization process. The introduction of Ce into CoP can lead to electronic modulation of Co, thus lowering the energy barrier for both to deliver better activity. The CoP with an optimized Ce-doping level exhibits high HER and OER performance and can be used as a highly efficient catalyst for water splitting. Here, Ce doping can introduce electronic modulation, optimizing the adsorption of H on CoP to promote HER performance as well as reduce the energy barrier of the potential-limiting step by facilitating electron transfer from Ce to Co. This work provides new insights into the development of a high-performance water-splitting electrocatalyst.
For zinc–air batteries, it
is of great importance to heighten
the oxygen reduction reaction (ORR) activity of cathode electrocatalysts.
Herein, we synthesized carbon nanoribbons doped with Fe, B, and N
as high-activity ORR electrocatalysts by a templating method. Benefiting
from the melamine fiber (MF) and B doping, the as-prepared carbon
nanoribbon has a high specific surface area, and the improved turnover
frequency of Fe sites increases the ORR activity. The as-synthesized
Fe–B–N–C electrocatalyst shows an improved half-wave
potential and limited current density compared to Fe–N–C,
B–N–C, and N–C. Moreover, zinc–air batteries
with the Fe–B–N–C electrocatalyst exhibit a higher
specific capacity and better long-term durability compared to those
with commercial Pt/C. This work provides an effective strategy to
synthesize noble-metal-free electrocatalysts for wide applications
of zinc–air batteries.
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