Imaging heterogeneity and transport of degraded Nafion membranes. Issue 120 (20th November 2015)

• Record Type: Journal Article
• Authors: Shi, Wenqing; Baker, Lane A.
• Is Part Of: RSC advances. Volume 5:Issue 120(2015)
• Page Start: 99284
• Page End: 99290
• Publication Date: 2015-11-20
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra20291d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : Accelerated aging experiments of Nafion® 212 (N212) membranes were carried out. Characterization of degraded N212 membrane samples was performed by microscopy, spectroscopy and electrochemical methods. Abstract : Accelerated aging experiments of Nafion® 212 (N212) membranes were carried out with Fenton's reagent under a series of degradation durations. Morphological changes and appearance of surface defects on degraded membranes were characterized by scanning electron microscopy (SEM). X-ray photoelectron spectroscopy (XPS) mapping was performed to investigate heterogeneity in chemical composition "on" and "off" surface defects. In addition, scanning ion conductance microscopy-scanning electrochemical microscopy (SICM-SECM) was used to map the heterogeneous permeability of degraded membranes to a cationic redox probe.