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2D-hexagonal boron nitride screen-printed bulk-modified electrochemical platforms explored towards oxygen reduction reactions

Khan, AF, Ferrari, AGM, Hughes, JP, Smith, GC, Banks, CE and Rowley-Neale, SJ (2022) 2D-hexagonal boron nitride screen-printed bulk-modified electrochemical platforms explored towards oxygen reduction reactions. Sensors, 22 (9). p. 3330. ISSN 1424-8220

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Abstract

A low-cost, scalable and reproducible approach for the mass production of screen-printed electrode (SPE) platforms that have varying percentage mass incorporations of 2D hexagonal boron nitride (2D-hBN) (2D-hBN/SPEs) is demonstrated herein. These novel 2D-hBN/SPEs are explored as a potential metal-free electrocatalysts towards oxygen reduction reactions (ORRs) within acidic media where their performance is evaluated. A 5% mass incorporation of 2D-hBN into the SPEs resulted in the most beneficial ORR catalysis, reducing the ORR onset potential by ca. 200 mV in comparison to bare/unmodified SPEs. Furthermore, an increase in the achievable current of 83% is also exhibited upon the utilisation of a 2D-hBN/SPE in comparison to its unmodified equivalent. The screen-printed fabrication approach replaces the less-reproducible and time-consuming drop-casting technique of 2D-hBN and provides an alternative approach for the large-scale manufacture of novel electrode platforms that can be utilised in a variety of applications.

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