| Full text | |
| Author(s): |
Blaskievicz, Sirlon F.
;
Teixeira, Ivo F.
;
Mascaro, Lucia H.
;
Carta, Mariolino
;
Mckeown, Neil B.
;
Zhao, Yuanzhu
;
Marken, Frank
Total Authors: 7
|
| Document type: | Journal article |
| Source: | ELECTROCATALYSIS; v. 15, n. 1, p. 10-pg., 2023-11-11. |
| 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. (AU) | |
| FAPESP's process: | 14/50249-8 - Green chemistry: sustainable synthetic methods employing benign solvents, safer reagents, and bio-renewable feedstock |
| Grantee: | Arlene Gonçalves Corrêa |
| Support Opportunities: | Research Grants - Research Centers in Engineering Program |
| FAPESP's process: | 17/11986-5 - Generation and storage of New Energy: bringing technological development for the country |
| Grantee: | Ana Flávia Nogueira |
| Support Opportunities: | Research Grants - Research Centers in Engineering Program |
| FAPESP's process: | 20/14741-6 - Graphitic carbon nitrides as platforms for single-atom photocatalysis: moving towards design principles for improved performance |
| Grantee: | Ivo Freitas Teixeira |
| Support Opportunities: | Research Grants - Young Investigators Grants |