Constructing a highly oriented layered MOF nanoarray from a layered double hydroxide for efficient and long-lasting alkaline water oxidation electrocatalysis

Metal organic frameworks (MOFs) with massive tunable periodic pores and high specific areas exceeding those of zeolites and carbon-based materials hold great promise for energy storage and conversion. In this study, we report the use of an NiFe-layered double hydroxide nanoarray on a nickel foam (Ni...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2019, Vol.7 (15), p.8771-8776
Main Authors: Yang, Lin, Zhu, Guilei, Wen, Hao, Guan, Xin, Sun, Xun, Feng, Hao, Tian, Wenli, Zheng, Dengchao, Cheng, Xiaowei, Yao, Yadong
Format: Article
Language:English
Subjects:
Alkaline water
Catalysis
Catalytic activity
Energy storage
Fabrication
Hydroxides
Intermetallic compounds
Iron compounds
Metal foams
Metal-organic frameworks
Nickel
Nickel compounds
Oxidation
Zeolites
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Summary:Metal organic frameworks (MOFs) with massive tunable periodic pores and high specific areas exceeding those of zeolites and carbon-based materials hold great promise for energy storage and conversion. In this study, we report the use of an NiFe-layered double hydroxide nanoarray on a nickel foam (NiFe-LDH/NF) as both the precursor and nanoarray template toward the in situ fabrication of a highly oriented three-dimensional (3D) MOF nanoarray (Fe 0.1 -Ni-MOF/NF). The as-prepared Fe 0.1 -Ni-MOF/NF behaved efficiently as an earth-abundant electrocatalyst for alkaline water oxidation, requiring low overpotentials of 243 and 263 mV to afford 50 and 100 mA cm −2 in 1.0 M KOH, respectively; moreover, its catalytic activity could be maintained for at least 20 h at a high current density of 150 mA cm −2 . Impressively, it also achieved high turnover frequency values of 0.018 and 0.086 O 2 s −1 at low overpotentials of 250 and 300 mV, respectively.
ISSN:2050-7488
2050-7496
DOI:10.1039/C9TA00819E