Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 7, Issue 15, Pages 8771-8776Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ta00819e
Keywords
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Funding
- Key Technologies Research and Development Program of Sichuan Province [2017GZ0419]
- Graduate Student's Research and Innovation Fund of Sichuan University [2018YJSY069]
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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 263mV 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.
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