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Lookup NU author(s): Dr Paul Waddell,
Dr John ErringtonORCiD
This is the authors' accepted manuscript of an article that has been published in its final definitive form by American Chemical Society, 2021.
For re-use rights please refer to the publisher's terms and conditions.
The exploration of composition−structure−function relationship in proton-conducting solids remains a challenge in materials chemistry. Polyoxometalate-based compounds have been long considered as candidates for proton conductors; however, their low structural stability and a large decrease in conductivity under reduced relative humidity (RH) have limited their applications. To overcome such limitations, the hybridization of polyoxometalates with proton-conducting polymers has emerged as a promising method. Besides, 4f lanthanide ions possess a high coordination number, which can be utilized to attract water molecules and to build robust frameworks. Herein, a Preyssler-type polyoxometalate functionalized with a 9-coordinate Eu 3+ (Eu[P5 W30 O110 K]11− ) is newly synthesized and combined with poly(allylamine) with amine moieties as protonation sites. The resulting robust crystalline composite exhibits an ultrahigh proton conductivity >10 −2 S cm −1 at 368 K and 90% RH, which is still >10 −3 S cm −1 at 50% RH, due to the strengthened and extended hydrogen-bonding network.
Author(s): Iwano T, Shitamatsu K, Ogiwara N, Okuno M, Kikukawa Y, Ikemoto S, Shirai S, Muratsugu S, Waddell PG, Errington RJ, Sadakane M, Uchida S
Publication type: Article
Publication status: Published
Journal: ACS Applied Materials and Interfaces
Print publication date: 28/04/2021
Online publication date: 19/04/2021
Acceptance date: 30/03/2021
Date deposited: 13/05/2021
ISSN (print): 1944-8244
ISSN (electronic): 1944-8252
Publisher: American Chemical Society
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