Within the framework of the circular economy, the waste litchi's skins were upgraded and transformed into electrocatalysts for oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER). The waste litchi's skins were pyrolyzed, activated, and then used as carbon support for fabricating metal–nitrogen–carbons (M–N–Cs) which belong to a promising class of platinum group metal-free electrocatalysts. The activated char was functionalized with transition metal (Fe, Ni, and Co)- phthalocyanine (Pc) in monometallic and bimetallic fashion by subjecting it to a thermal treatment at 600 and 900°C. The samples functionalized at 900°C showed higher performance for HER due to the formation of metal nanoparticles, whereas the samples functionalized at 600°C showed higher performance for ORR. Particularly, sample Ni–Co 900 had an overpotential of −0.38 V for HER, while the sample Fe 600 was the most active electrocatalyst for ORR by demonstrating the onset potential of ∼0.9 V (a half-wave potential of ∼0.81 V) with the least production of unwanted peroxide anion.

Mirshokraee, S., Muhyuddin, M., Lorenzi, R., Tseberlidis, G., Vecchio, C., Baglio, V., et al. (2023). Litchi‐derived platinum group metal‐free electrocatalysts for oxygen reduction reaction and hydrogen evolution reaction in alkaline media. SUSMAT, 3(2 (April 2023)), 248-262 [10.1002/sus2.121].

Litchi‐derived platinum group metal‐free electrocatalysts for oxygen reduction reaction and hydrogen evolution reaction in alkaline media

Mirshokraee, Seyed Ariana
Primo
;
Muhyuddin, Mohsin
Secondo
;
Lorenzi, Roberto;Tseberlidis, Giorgio;Santoro, Carlo
Ultimo
2023

Abstract

Within the framework of the circular economy, the waste litchi's skins were upgraded and transformed into electrocatalysts for oxygen reduction reaction (ORR) and hydrogen evolution reaction (HER). The waste litchi's skins were pyrolyzed, activated, and then used as carbon support for fabricating metal–nitrogen–carbons (M–N–Cs) which belong to a promising class of platinum group metal-free electrocatalysts. The activated char was functionalized with transition metal (Fe, Ni, and Co)- phthalocyanine (Pc) in monometallic and bimetallic fashion by subjecting it to a thermal treatment at 600 and 900°C. The samples functionalized at 900°C showed higher performance for HER due to the formation of metal nanoparticles, whereas the samples functionalized at 600°C showed higher performance for ORR. Particularly, sample Ni–Co 900 had an overpotential of −0.38 V for HER, while the sample Fe 600 was the most active electrocatalyst for ORR by demonstrating the onset potential of ∼0.9 V (a half-wave potential of ∼0.81 V) with the least production of unwanted peroxide anion.
Articolo in rivista - Articolo scientifico
circular economy, hydrogen evolution reaction, oxygen reduction reaction, PGM-free electrocatalyst
English
24-mar-2023
2023
3
2 (April 2023)
248
262
open
Mirshokraee, S., Muhyuddin, M., Lorenzi, R., Tseberlidis, G., Vecchio, C., Baglio, V., et al. (2023). Litchi‐derived platinum group metal‐free electrocatalysts for oxygen reduction reaction and hydrogen evolution reaction in alkaline media. SUSMAT, 3(2 (April 2023)), 248-262 [10.1002/sus2.121].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/406775
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