Jump to main content
Jump to site search

Issue 13, 2019
Previous Article Next Article

Rational construction of self-supported triangle-like MOF-derived hollow (Ni,Co)Se2 arrays for electrocatalysis and supercapacitors

Author affiliations

Abstract

In this work, we have adopted a facile three-step method for constructing an intriguing bifunctional electrode of self-supported hollow (Ni,Co)Se2 arrays with a metal–organic framework (MOF) precursor. The triangle-like cobalt-based MOF arrays are first grown on a carbon cloth at room temperature, which is followed by an ion exchange/etching process with Ni(NO3)2 to form a critical hollow nanostructure with an incorporated hetero-metal element. The intermediate is then transformed into the final product through solvothermal selenization treatment. Taking advantages of the structural and compositional merits as well as the self-supporting nature, the resultant (Ni,Co)Se2 electrode exhibits excellent electrochemical activity and stability. When tested as an electrocatalyst for the oxygen evolution reaction (OER), the (Ni,Co)Se2 array electrode displayed a low onset overpotential of 226 mV and a small overpotential of 256 mV to afford a current density of 10 mA cm−2. The (Ni,Co)Se2 electrode is also utilized in a supercapacitor, which delivers a high specific capacitance of 2.85 F cm−2 at 2 mA cm−2 and exhibits excellent cycling stability with a capacitance retention of 80.8% after 2000 charge–discharge cycles at 20 mA cm−2. These results demonstrate the significance of the rational design of electrode materials and disclose the potential of our MOF-derived hollow (Ni,Co)Se2 array electrode for a variety of practical applications in energy conversion and storage.

Graphical abstract: Rational construction of self-supported triangle-like MOF-derived hollow (Ni,Co)Se2 arrays for electrocatalysis and supercapacitors

Back to tab navigation

Supplementary files

Publication details

The article was received on 14 Jan 2019, accepted on 03 Mar 2019 and first published on 04 Mar 2019


Article type: Paper
DOI: 10.1039/C9NR00411D
Nanoscale, 2019,11, 6401-6409

  •   Request permissions

    Rational construction of self-supported triangle-like MOF-derived hollow (Ni,Co)Se2 arrays for electrocatalysis and supercapacitors

    W. Song, X. Teng, Y. Liu, J. Wang, Y. Niu, X. He, C. Zhang and Z. Chen, Nanoscale, 2019, 11, 6401
    DOI: 10.1039/C9NR00411D

Search articles by author

Spotlight

Advertisements