Abstract

Polymeric carbon nitrides (C 3N 4) are photochemically active organic semiconductors that can be produced in a wide range of structural types. Here, a poly-(heptazine imide) containing nickel single atoms (Ni-PHI) is employed for photochemical hydrogen production and is compared to the non-nickel-doped semiconductor. Film deposits are formed on a platinum disk electrode (to detect hydrogen) and a coating of the molecularly rigid polymer of intrinsic microporosity PIM-1 is applied to (i) mechanically stabilize the photo-catalyst film without impeding photocatalysis and (ii) assist in the interfacial hydrogen capture/oxygen suppression process. In the presence of hole quenchers such as methanol or ethanol, anodic photocurrents linked to hydrogen production/oxidation are observed. A comparison with an experiment on glassy carbon confirms the formation of interfacial hydrogen as a mediator. The effects of hole quencher concentration are evaluated. The system Pt/Ni-PHI/PIM-1 is employed in a single-compartment photo-fuel cell. Graphical Abstract: [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)42-51
Number of pages10
JournalElectrocatalysis
Volume15
Issue number1
Early online date11 Nov 2023
DOIs
Publication statusPublished - 31 Jan 2024

Data Availability Statement

Data and materials are available from the authors.

Keywords

  • Biomass
  • Hydrogen
  • Intrinsic Microporosity
  • Photocatalysis
  • Photofuel cell

ASJC Scopus subject areas

  • Electrochemistry

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