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Issue 15, 2019
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Constructing a highly oriented layered MOF nanoarray from a layered double hydroxide for efficient and long-lasting alkaline water oxidation electrocatalysis

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Abstract

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 (Fe0.1-Ni-MOF/NF). The as-prepared Fe0.1-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 O2 s−1 at low overpotentials of 250 and 300 mV, respectively.

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

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Article information


Submitted
22 Jan 2019
Accepted
11 Mar 2019
First published
13 Mar 2019

J. Mater. Chem. A, 2019,7, 8771-8776
Article type
Communication

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

L. Yang, G. Zhu, H. Wen, X. Guan, X. Sun, H. Feng, W. Tian, D. Zheng, X. Cheng and Y. Yao, J. Mater. Chem. A, 2019, 7, 8771
DOI: 10.1039/C9TA00819E

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