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 language | English |
---|---|
Pages (from-to) | 42-51 |
Number of pages | 10 |
Journal | Electrocatalysis |
Volume | 15 |
Issue number | 1 |
Early online date | 11 Nov 2023 |
DOIs | |
Publication status | Published - 31 Jan 2024 |
Data Availability Statement
Data and materials are available from the authors.Funding
S.F.B. thanks to the financial support of the CAPES Foundation for a sandwich doctorate scholarship (CAPES-PRINT Process 88887.465542/2019-00). L.H.M. thanks to FAPESP (2017/11986-5, 2020/14741-6, 2014/50249-8). Y.Z. (201809350006) is grateful to the China Scholarship Council for a PhD scholarship.
Funders | Funder number |
---|---|
Fundação de Amparo à Pesquisa do Estado de São Paulo | |
Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior | 88887.465542/2019-00 |
China Scholarship Council | 201809350006 |
Centros de Pesquisa, Inovação e Difusão, Fundação Amazônia Paraense de Amparo à Pesquisa | 2020/14741-6, 2014/50249-8, 2017/11986-5 |
Keywords
- Biomass
- Hydrogen
- Intrinsic Microporosity
- Photocatalysis
- Photofuel cell
ASJC Scopus subject areas
- Electrochemistry