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The Importance of Using Alkaline Ionomer Binders for Screening Electrocatalysts in Alkaline Electrolyte

Jervis, R; Mansor, N; Sobrido, AJ; Jones, S; Gibbs, C; Neville, TP; Millichamp, J; ... Brett, DJL; + view all (2017) The Importance of Using Alkaline Ionomer Binders for Screening Electrocatalysts in Alkaline Electrolyte. Journal of the Electrochemical Society , 164 (14) F1551-F1555. 10.1149/2.0441714jes. Green open access

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Abstract

Many electrochemical studies exist using the acidic ionomer Nafion as a binder in the ink formulation when operating in high pH systems. However, Nafion acts as an ionic insulator for OH−, and for reactions such as the hydrogen oxidation reaction, the transport of OH− to the catalyst surface is of utmost importance when elucidating the performance of a catalyst. This work demonstrates that when using an alkaline polymer binder in the ink, the apparent activity of a commercially synthesized Pt/C catalyst is increased due to a lower diffusion resistance for the reaction. In order to obtain accurate values for kinetic data in alkaline media, the use of the acidic binder should be avoided.

Type: Article
Title: The Importance of Using Alkaline Ionomer Binders for Screening Electrocatalysts in Alkaline Electrolyte
Open access status: An open access version is available from UCL Discovery
DOI: 10.1149/2.0441714jes
Publisher version: http://dx.doi.org/10.1149/2.0441714jes
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering
URI: https://discovery.ucl.ac.uk/id/eprint/10051838
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