Journal
APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY
Volume 320, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2022.122023
Keywords
Zinc-Air battery; TernaryCu0; 1Co0; 3Mn0; CV activation; Surface reconstruction; OER
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In this work, bimetallic transition oxides were successfully synthesized into two-dimensional nanosheets, which expose all the catalytic sites on the surface. Cu, N, and P elements were then doped inside the nanosheets to activate the catalytic sites. The resulting composites show improved catalytic performance for OER and ORR, as well as superior performance as a cathodic catalyst for ZAB.
In this work, we successfully synthesized bimetallic transition oxides into two-dimensional nanosheets, which expose all the catalytic sites on the surface. Then, Cu, N, and P elements were rationally doped inside the as prepared Co0.4Mn0.6O2 nanosheets to activate the Co/Mn catalytic sites. It is found that the resulting N/P-Cu0.1Co0.3Mn0.6O2/CNTs composites show an overpotential eta 10 of 290 mV for OER, much lower than the value measured using the original Co0.4Mn0.6O2/CNTs (463 mV). Meanwhile, N/P-Cu0.1Co0.3Mn0.6O2/CNTs also show decent performance with a half potential (E1/2) of 0.82 V vs RHE for ORR, i.e., a 702 mV voltage difference for OER and ORR, much lower than other transition metal oxide catalysts. By using N/P-Cu0.1Co0.3Mn0.6O2/CNTs as a cathodic catalyst for ZAB, we measured superior performance, with a peak power density of 108.1 mW cm-2 and stable operation for over 200 h at 10 mA cm-2, better than IrO2-Pt/C-based ZAB.
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