Issue 43, 2019

The Co2+/Ni2+ ion-mediated formation of a topochemically converted copper coordination polymer: structure-dependent electrocatalytic activity

Abstract

Surfactants or templating agents are known to influence the solid-state structural organization of metal–organic coordination polymers. Herein, we report the unusual influence of Co2+/Ni2+ ions on the formation of a copper coordination polymeric structure with the N-(-2-hydroxybenzyl)-alanine (HBA) ligand. The presence of Ni2+ ions in the growth solution led to two different structures: water-coordinated (1) and topochemically converted non-water coordinated (2) copper coordination polymer structures. On the contrary, the Co2+ ions led to only a non-water coordinated topochemically converted structure. X-ray absorption near-edge structure (XANES) and PXRD studies confirmed the absence of Co2+/Ni2+ ions in the network and the phase purity of the sample, respectively. The electrocatalytic hydrogen evolution reaction (HER) activity of copper coordination polymers in a basic medium (1.0 M KOH) revealed a relatively enhanced activity for the water-coordinated copper coordination polymer (jmax = 220 mA cm−2, η (10 mA cm−2) = 417 mV) as compared to that for the non-water coordinated structure (jmax = 84 mA cm−2, η (10 mA cm−2) = 535 mV). However, the mixed catalyst of 1 and 2 exhibited a relatively higher current density (jmax = 275 mA cm−2) as compared to the pure water-coordinated polymer (jmax = 220 mA cm−2). Importantly, the copper coordination polymer electrocatalyst did not require complementary conducting materials.

Graphical abstract: The Co2+/Ni2+ ion-mediated formation of a topochemically converted copper coordination polymer: structure-dependent electrocatalytic activity

Supplementary files

Article information

Article type
Paper
Submitted
29 Qad 2019
Accepted
18 Way 2019
First published
20 Way 2019

CrystEngComm, 2019,21, 6552-6557

The Co2+/Ni2+ ion-mediated formation of a topochemically converted copper coordination polymer: structure-dependent electrocatalytic activity

P. Muthukumar, D. Moon and S. P. Anthony, CrystEngComm, 2019, 21, 6552 DOI: 10.1039/C9CE01178A

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