Issue 22, 2021

{Cu2SiW12O40}@HKUST-1 synthesized by a one-step solution method with efficient bifunctional activity for supercapacitors and the oxygen evolution reaction

Abstract

The combination of polyoxometalate (POM) and metal–organic framework (MOF) composite materials (POMOFs) is desirable, due to their applications in efficient supercapacitors and electrocatalytic oxygen evolution, but it is still challenging. Herein, we successfully synthesized {Cu2SiW12O40}@HKUST-1 through a one-step solution method. Synergy between {Cu2SiW12O40} and HKUST-1 can promote mass/charge transfer and the adsorption/desorption of intermediates on {Cu2SiW12O40}@HKUST-1. In a three-electrode system, {Cu2SiW12O40}@HKUST-1 as the electrode material has a specific capacitance of 5096.5 F g−1 when the current density is 1 A g−1. After 6000 cycles, the retention rate is 92%, which is much higher than values reported in the literature. A symmetrical electrode assembled with foamed nickel as the current collector has a power density of 510.81 W kg−1 and an energy density of 15.31 W h kg−1, in a 1.0 V voltage window. At the same time, the electrode material in 1.0 M KOH aqueous solution, when the scanning speed is 5 mV s−1, exhibits an overpotential for the electrocatalytic water oxygen evolution reaction (OER) of 340 mV (without iR compensation). Especially at high current densities, {Cu2SiW12O40}@HKUST-1 shows better performance than commercial RuO2. Further, it has excellent catalytic durability. This work provides a basis for the further application of POMOFs.

Graphical abstract: {Cu2SiW12O40}@HKUST-1 synthesized by a one-step solution method with efficient bifunctional activity for supercapacitors and the oxygen evolution reaction

Supplementary files

Article information

Article type
Paper
Submitted
20 Feb 2021
Accepted
11 May 2021
First published
12 May 2021

J. Mater. Chem. A, 2021,9, 13161-13169

{Cu2SiW12O40}@HKUST-1 synthesized by a one-step solution method with efficient bifunctional activity for supercapacitors and the oxygen evolution reaction

H. Liu, L. Gong, C. Wang, C. Wang, K. Yu and B. Zhou, J. Mater. Chem. A, 2021, 9, 13161 DOI: 10.1039/D1TA01503F

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements