Hierarchical Fe-doped NiOx nanotubes assembled from ultrathin nanosheets containing trivalent nickel for oxygen evolution reaction

被引：170

作者：

Wu, Geng ^{[1
,2
]}

Chen, Wenxing ^{[3
]}

Zheng, Xusheng ^{[4
]}

He, Daping ^{[1
,2
]}

Luo, Yiqi ^{[1
,2
]}

Wang, Xiaoqian ^{[1
,2
]}

Yang, Jian ^{[1
,2
]}

Wu, Yuen ^{[1
,2
]}

Yan, Wensheng ^{[4
]}

Zhuang, Zhongbin ^{[5
]}

Hong, Xun ^{[1
,2
]}

Li, Yadong ^{[1
,2
,3
]}

机构：

[1] Univ Sci & Technol China, CAN, Hefei 230026, Anhui, Peoples R China

[2] Univ Sci & Technol China, Dept Chem, Hefei 230026, Anhui, Peoples R China

[3] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

[4] Univ Sci & Technol China, NSRL, Hefei 230029, Anhui, Peoples R China

[5] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China

来源：

NANO ENERGY | 2017年 / 38卷

基金：

中国国家自然科学基金;

关键词：

Electrocatalysis; Oxygen evolution reaction; Nanosheets; Nanotubes; Nickel oxide; POROUS NANOWIRE ARRAYS; OXIDE CATALYSTS; ELECTROCATALYSTS; OXIDATION; IRON; EFFICIENT; HYDROXIDE; ELECTRON;

D O I：

10.1016/j.nanoen.2017.05.044

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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).

引用

页码：167 / 174

页数：8

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