期刊
ACS APPLIED ENERGY MATERIALS
卷 3, 期 4, 页码 3577-3585出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.0c00080
关键词
iron phosphide; ultrathin nanosheets; two-dimensional (2D) materials; Fe defects; oxygen evolution reaction (OER); electrocatalytic water Splitting; high stability
资金
- National Natural Science Foundation of China [21673157, 21633004]
- Beiyang Reserved Academic Program of Tianjin University
The slow kinetics of oxygen evolution reaction (OER) catalysts with a large overpotential restricts the feasibility of electrochemical water splitting. Iron based electrodes are attractive candidates, but elevating their activity faces great challenges in weak intermediate adsorption. Herein, we demonstrated that ultrathin FeP nanosheets with Fe defects on nickel foam (FeP-NS/NF) exhibited a remarkable electrocatalytic oxygen evolution performance. The overpotential of FeP-NS/NF only requires 220 mV to achieve a current density of 10 mA cm(-2) in 1 M KOH solution. Moreover, it possessed excellent durability during the 85 h stability test. Fe defects over ultrathin FeP evidenced by X-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) have been experimentally demonstrated to promote oxygenated intermediate adsorption, which largely reduce the overpotential of OER.
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