期刊
ELECTROCHIMICA ACTA
卷 412, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2022.140128
关键词
Ball milling; Iron phthalocyanine; Alkaline environment; Methanol tolerance; Potential cycling
资金
- Italian Ministry of University and Research (Ministero dell'Univerita e della Ricerca, MUR) [PGR18MAZLI]
PGM-free electrocatalysts for ORR were successfully synthesized using ball milling. These Fe-N-C electrocatalysts showed promising activity and stability in alkaline environment, surpassing the commercial Pt/C electrocatalyst.
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.
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