Open Access Article
This Open Access Article is licensed under a Creative Commons Attribution 3.0 Unported Licence
Correction: Polymer-bound antioxidants in grafted membranes for fuel cells
Yves
Buchmüller
,
Alexander
Wokaun
and
Lorenz
Gubler
*
Electrochemistry Laboratory, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland. E-mail: lorenz.gubler@psi.ch; Fax: +41-56-3104416; Tel: +41-56-3102673
First published on 12th January 2017
Abstract
Correction for ‘Polymer-bound antioxidants in grafted membranes for fuel cells’ by Yves Buchmüller et al., J. Mater. Chem. A, 2014, 2, 5870–5882.
There are errors in eqn (5) in the original article, the correct equation for the calculation of the theoretical ion exchange capacity (IEC) is:
where GLtot is the graft level (in mass%) of styrene and comonomer, Mstyrene is the molar mass of styrene (104.2 g mol−1), Mcomonomer is the molar mass of the comonomer, MSO3 is the molar mass of SO3 (80.1 g mol−1) and Rm is the molar ratio of styrene and comonomer in the graft component.
In the text of the article, the correct expression was used to calculate the degree of sulfonation of the various membranes.
There are also some errors in Table 4 of the original manuscript. The correct values for the molar fraction of styrene in the grafts, XS, are given in the third column. Columns 4 to 8 are omitted for clarity.
Table 4 (partly shown) Ex situ properties for the different radiation grafted, post-functionalized and sulfonated membranes.
| ETFE-g-P() | Graft level | XS (mol%) |
|---|---|---|
| S | 25 | 100 |
| S/VBC (Tyr) | 66 | 62 ± 2 |
| S/GMA (Tyr) | 35 | 73 ± 2 |
| S/GMA (Tyr) | 55 | 72 ± 3 |
| S/GMA (diol) | 35 | 73 ± 2 |
| S/GMA (diol) | 55 | 73 ± 3 |
| Nafion NR212 | — | — |
The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.
| This journal is © The Royal Society of Chemistry 2017 |