期刊
NANO ENERGY
卷 38, 期 -, 页码 167-174出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2017.05.044
关键词
Electrocatalysis; Oxygen evolution reaction; Nanosheets; Nanotubes; Nickel oxide
类别
资金
- Fundamental Research Funds for the Central Universities [WK2060190081]
- China Ministry of Science and Technology [0202801]
- National Natural Science Foundation of China [21571169, 21521091, 21390393, U1463202]
To design highly efficient and low-cost electrocatalysts for oxygen evolution reaction (OER) is a great challenge for electrochemical water splitting. Herein, we report the preparation of hierarchical Fe-doped NiOx nanotubes assembled from ultrathin nanosheets with a thickness of 2.4 nm. X-ray photoelectron spectroscopy (XPS) spectra, X-ray absorption near-edge structure (XANES) spectroscopy and extended X-ray absorption fine structure (EXAFS) spectroscopy investigations have been suggested that the incorporation of Fe results in abundant trivalent nickel and nickel vacancies. Benefitting from their unique geometric and electronic structure, the as-prepared hierarchical Fe-doped NiOx nanotubes exhibit outstanding OER activity and stability, with overpotential of 310 mV and a small Tafel slope of similar to 49 mV dec(-1) at 10 mA cm(-2).
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