Highly Scalable Conversion of Blood Protoporphyrin to Efficient Electrocatalyst for CO 2-to-CO Conversion

Matteo Miola, Simin Li, Xing-Ming Hu*, Marcel Ceccato, Annette-E. Surkus, Edmund Welter, Steen Uttrup Pedersen, Henrik Junge, Troels Skrydstrup, Matthias Beller*, Kim Daasbjerg*

*Corresponding author for this work

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaperJournal articleResearchpeer-review

Abstract

Electrochemical CO2 reduction to valuable chemicals represents a green
and sustainable approach to close the anthropogenic carbon cycle, but has
been impeded by low efficiency and high cost of electrocatalysts. Here, a
cost-effective hybrid catalyst consisting of hemin (chloroprotoporphyrin IX
iron(III)), a product recovered from bovine blood, adsorbed onto commercial
Vulcan carbon is reported. Upon heat treatment, this material shows significantly
improved activity and selectivity for CO2 reduction in water while
exhibiting good stability for more than 10 h. The heat treatment leads to
consecutive removal of the axial chlorine atom and decomposition of the iron
porphyrin ring, restructuring to form atomic Fe sites. The optimized hybrid
catalyst obtained at 900 °C shows near-unity selectivity for reduction of CO2
to CO at a small overpotential of 310 mV. The insight into transformation of
adsorbed Fe complexes into single Fe atoms upon heat treatment provides
guidance for development of single atom catalysts.
Original languageEnglish
Article number2100067
JournalAdvanced Materials Interfaces
Volume8
Issue12
Number of pages9
ISSN2196-7350
DOIs
Publication statusPublished - Jun 2021

Keywords

  • CO reduction
  • heat treatment
  • heterogeneous electrocatalysis
  • molecular catalyst
  • structure-activity relationship
  • structure&#8208
  • HEMIN
  • CO2 REDUCTION
  • SYNTHETIC STRATEGIES
  • ELECTROCHEMICAL REDUCTION
  • PORPHYRIN
  • CO
  • IMMOBILIZATION
  • activity relationship
  • NANOTUBES
  • METAL
  • (2) reduction
  • CARBON-DIOXIDE
  • CATALYSTS

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