Fiaz, M., Kashif, M., Shah, J. H., Ashiq, M. N., Gregory, D.H. , Batool, S. R. and Athar, M. (2021) Incorporation of MnO2 nanoparticles into MOF-5 for efficient oxygen evolution reaction. Ionics, 27, pp. 2159-2167. (doi: 10.1007/s11581-021-03987-1)
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Abstract
A composite MnO2@MOF-5 is prepared by in situ incorporation of pre-synthesized MnO2 nanoparticles into metal organic framework, MOF-5, during synthesis. The product is characterized by powder X-ray diffraction analysis, Raman spectroscopy, Fourier transform infrared spectroscopy, ultraviolet-visible spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and elemental mapping, which support the formation of proposed composite materials. The oxygen evolution reaction activity of MnO2@MOF-5 composite is evaluated by cyclic voltammetry, linear sweep voltammetry, and chronoamperometric measurement under visible light. It is found that MnO2@MOF-5/NF has better durability and ability to produce a current density of 10 mAcm−2 at only 324 mV overpotential with lower 71 mVdec−1 Tafel slope as compared to some of previously reported Mn-based catalysts for oxygen evolution reaction (OER). The stability of these electrodes is evaluated by chronoamperometric studies for 6000 s in the presence of visible light, and they showed constant current density. Furthermore, the stability studied by continuous CV sweeps in 1.0 M NaOH at a scan rate of 100 mVs−1 shows that these materials are stable up to 100 cycles, which confirms the stability and durability of the electrodes.
Item Type: | Articles |
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Additional Information: | Authors acknowledge Higher Education Commission (HEC) of Pakistan for financial support. |
Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Fiaz, Muhammad and Gregory, Professor Duncan |
Authors: | Fiaz, M., Kashif, M., Shah, J. H., Ashiq, M. N., Gregory, D.H., Batool, S. R., and Athar, M. |
College/School: | College of Science and Engineering > School of Chemistry |
Journal Name: | Ionics |
Publisher: | Springer |
ISSN: | 0947-7047 |
ISSN (Online): | 1862-0760 |
Published Online: | 15 March 2021 |
Copyright Holders: | Copyright © 2021 The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature |
First Published: | First published in Ionics 27:2159–2167 |
Publisher Policy: | Reproduced in accordance with the copyright policy of the publisher |
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