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Hydrogen-Mediated Photoelectrocatalysis with Nickel-Modified Poly(Heptazine Imides)
,
Neil B. McKeown,
Yuanzhu Zhao,
Frank Marken
Electrocatalysis, Volume: 15, Issue: 1, Pages: 42 - 51
Swansea University Author:
Mariolino Carta
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DOI (Published version): 10.1007/s12678-023-00852-9
Abstract
Polymeric carbon nitrides (C3N4) 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-dope...
| Published in: | Electrocatalysis |
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| ISSN: | 1868-2529 1868-5994 |
| Published: |
Springer Science and Business Media LLC
2024
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa65057 |
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| Abstract: |
Polymeric carbon nitrides (C3N4) 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. |
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| Keywords: |
Biomass; Photofuel cell; Photocatalysis; Hydrogen; Intrinsic Microporosity |
| College: |
Faculty of Science and Engineering |
| Funders: |
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. |
| Issue: |
1 |
| Start Page: |
42 |
| End Page: |
51 |