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Lignin-derived bimetallic platinum group metal-free oxygen reduction reaction electrocatalysts for acid and alkaline fuel cells

  • Mohsin Muhyuddin
  • , Ariel Friedman
  • , Federico Poli
  • , Elisabetta Petri
  • , Hilah Honig
  • , Francesco Basile
  • , Andrea Fasolini
  • , Roberto Lorenzi
  • , Enrico Berretti
  • , Marco Bellini
  • , Alessandro Lavacchi
  • , Lior Elbaz
  • , Carlo Santoro
  • , Francesca Soavi
  • University of Milan - Bicocca
  • University of Bologna
  • National Research Council of Italy

Research output: Contribution to journalArticlepeer-review

50 Scopus citations

Abstract

Metal-nitrogen-carbons (M-N-Cs) as a reliable substitution for platinum-group-metals (PGMs) for oxygen reduction reaction (ORR) are emerging candidates to rationalize the technology of fuel cells. The development of M-N-Cs can further be economized by consuming waste biomass as an inexpensive carbon source for the electrocatalyst support. Herein, we report the simple fabrication and in-depth characterization of electrocatalysts using lignin-derived activated char. The activated char (LAC) was functionalized with metal phthalocyanine (FePc and MnPc) via atmosphere-controlled pyrolysis to produce monometallic M-N-Cs (L_Mn and L_Fe) and bimetallic M1-M2-N-Cs (L_FeMn) electrocatalysts. Raman spectroscopy and transmission electron microscopy (TEM) revealed a defect-rich architecture. XPS confirmed the coexistence of various nitrogen-containing active moieties. L_Fe and L_FeMn demonstrated appreciable ORR in both acidic and alkaline conditions whereas L_FeMn helped in restricting the peroxide yield, particularly in alkaline media. L_Fe and L_FeMn demonstrated remarkable onset potential (Eonset) of ∼0.942 V (vs RHE) with an E1/2 of 0.874 V (vs RHE) in 0.1 M KOH. In acid, L_FeMn had an Eonset of 0.817 V (vs RHE) and an E1/2 of ∼0.76 V (vs RHE). Finally, the L_FeMn as a cathode electrocatalyst was integrated and tested in PEMFC and AEMFC. AEMFC demonstrated optimistic performance with a peak power density of 261 mW cm−2 at the current density of ∼577 mA cm−2.

Original languageEnglish
Article number232416
JournalJournal of Power Sources
Volume556
DOIs
StatePublished - 1 Feb 2023

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.

Funding

C.S. would like to thank the support from the Italian Ministry of University and Research (Ministero dell'Università e della Ricerca – MUR) through the “Rita Levi Montalcini 2018” fellowship (Grant number PGR18MAZLI). The authors also thank the Italian ministry MIUR for funding through the FISR 2019 project AMPERE (FISR2019_01294). University of Bologna authors acknowledge MUR and UE support under the project “ECOSYSTEM FOR SUSTAINABLE TRANSITION IN EMILIA-ROMAGNA” of the National Recovery and Resilience Plan (NRRP-PNRR). C.S. would like to thank the support from the Italian Ministry of University and Research (Ministero dell’Università e della Ricerca – MUR) through the “Rita Levi Montalcini 2018” fellowship (Grant number PGR18MAZLI ). The authors also thank the Italian ministry MIUR for funding through the FISR 2019 project AMPERE ( FISR2019_01294 ). University of Bologna authors acknowledge MUR and UE support under the project “ECOSYSTEM FOR SUSTAINABLE TRANSITION IN EMILIA-ROMAGNA” of the National Recovery and Resilience Plan (NRRP-PNRR).

FundersFunder number
Italian ministry MIURFISR2019_01294
NRRP-PNRR
National Recovery and Resilience Plan
Ministero dell’Istruzione, dell’Università e della RicercaPGR18MAZLI
Università di Bologna

    UN SDGs

    This output contributes to the following UN Sustainable Development Goals (SDGs)

    1. SDG 7 - Affordable and Clean Energy
      SDG 7 Affordable and Clean Energy

    Keywords

    • Anion exchange membrane fuel cell
    • Lignin-derived char
    • Oxygen reduction reaction
    • Platinum group metal-free
    • Proton exchange membrane fuel cell

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