Platinum metal group (PGM-free) electrocatalysts for oxygen reduction reaction (ORR) were synthesized by ball milling of activated biochar and Fe(II) phthalocyanine. The biochar used as a carbon support was produced from pyrolysis of waste tea leaves at 1500 °C in argon atmosphere. The pyrolyzed waste tea was then activated with CO2 or urea. FE-SEM, HR-TEM, XPS, and Raman analyses were performed to investigate the morphology and the physicochemical properties of the electrocatalysts. The ORR activity and methanol tolerance of the Fe-N-C electrocatalysts were tested in rotating ring disk electrode (RRDE), showing promising results in terms of mass activity, onset and half-wave potential in an alkaline environment. Two different short potential cycling protocols demonstrated the high stability of these Fe-N-C electrocatalysts, especially when compared with a 20 wt. % commercial Pt/C electrocatalyst.

Zago, S., Bartoli, M., Muhyuddin, M., Vanacore, G., Jagdale, P., Tagliaferro, A., et al. (2022). Engineered biochar derived from pyrolyzed waste tea as a carbon support for Fe-N-C electrocatalysts for the oxygen reduction reaction. ELECTROCHIMICA ACTA, 412(20 April 2022) [10.1016/j.electacta.2022.140128].

Engineered biochar derived from pyrolyzed waste tea as a carbon support for Fe-N-C electrocatalysts for the oxygen reduction reaction

Muhyuddin M.;Vanacore G. M.;Santoro C.
Penultimo
;
2022

Abstract

Platinum metal group (PGM-free) electrocatalysts for oxygen reduction reaction (ORR) were synthesized by ball milling of activated biochar and Fe(II) phthalocyanine. The biochar used as a carbon support was produced from pyrolysis of waste tea leaves at 1500 °C in argon atmosphere. The pyrolyzed waste tea was then activated with CO2 or urea. FE-SEM, HR-TEM, XPS, and Raman analyses were performed to investigate the morphology and the physicochemical properties of the electrocatalysts. The ORR activity and methanol tolerance of the Fe-N-C electrocatalysts were tested in rotating ring disk electrode (RRDE), showing promising results in terms of mass activity, onset and half-wave potential in an alkaline environment. Two different short potential cycling protocols demonstrated the high stability of these Fe-N-C electrocatalysts, especially when compared with a 20 wt. % commercial Pt/C electrocatalyst.
Articolo in rivista - Articolo scientifico
Alkaline environment; Ball milling; Iron phthalocyanine; Methanol tolerance; Potential cycling;
English
Zago, S., Bartoli, M., Muhyuddin, M., Vanacore, G., Jagdale, P., Tagliaferro, A., et al. (2022). Engineered biochar derived from pyrolyzed waste tea as a carbon support for Fe-N-C electrocatalysts for the oxygen reduction reaction. ELECTROCHIMICA ACTA, 412(20 April 2022) [10.1016/j.electacta.2022.140128].
Zago, S; Bartoli, M; Muhyuddin, M; Vanacore, G; Jagdale, P; Tagliaferro, A; Santoro, C; Specchia, S
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/380100
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