期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 36, 页码 42715-42723出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c10441
关键词
metal atomic insertion; Prussian blue analogue framework; oxygen reduction reaction (ORR); oxygen evolution reaction (OER); hydrogen peroxide
资金
- Air Force Office of Scientific Research [FA9550-19-1-0296]
- Department of Energy, BES [DE-SC0012547]
Electrochemical methods hold promise for future clean energy storage and conversion, with most involving oxygen reactions. A facile synthesis method for highly efficient oxygen evolution and reduction catalysts has been reported, with CoNi-PBA-2 catalyst showing the highest activity for OER and Zn-PBA catalysts demonstrating high selectivity in ORR. Density functional theory (DFT) calculations confirm the high selectivity of Zn-PBA towards H2O2 in ORR.
Electrochemical methods are promising technical routes for future clean energy storage and conversion. Most of the electrochemical methods involve oxygen reactions. Unfavorable kinetics and sluggish reactions are the main challenges for these processes. We report here a facile synthesis of highly efficient oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalysts. The catalysts are synthesized through the fine-tuning of metal ions (M, specifically Co, Ni, Zn, and Cu) in Prussian blue analogues (PBAs) and thus termed as M-PBAs. The CoNi-PBA-2 catalyst shows the highest activity toward OER with an onset potential at 280 mV and a Tafel slope of 63 mV dec(-1). Zn-PBA catalysts demonstrate high selectivity in two-electron-transfer ORR The H2O2 yield is as high as 88% at 0 V vs RHE. Density functional theory (DFT) calculations also confirm the high selectivity of Zn-PBA toward H2O2 in ORR.
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