Imidazole substituted Zinc(ii ) phthalocyanines for co-catalyst-free photoelectrochemical and photocatalytic hydrogen evolution: influence of the anchoring group
| Autor: | Eminegul Genc, Gülbin Kurtay, Ersan Harputlu, Gizem Yanalak, Kasim Ocakoglu, Mine Ince, A. Celil Yüzer, Emre Aslan, Imren Hatay Patir |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Carboxylic acid Energy conversion efficiency Metals and Alloys chemistry.chemical_element General Chemistry Zinc Catalysis Surfaces Coatings and Films Electronic Optical and Magnetic Materials Turnover number chemistry.chemical_compound chemistry Materials Chemistry Ceramics and Composites Photocatalysis Imidazole Irradiation Nuclear chemistry |
| Zdroj: | Chemical Communications. 57:9196-9199 |
| ISSN: | 1364-548X 1359-7345 |
| Popis: | Novel zinc phthalocyanine derivatives, ZnPc-1 and ZnPc-2, consisting of one and four imidazole units, respectively, have been synthesized and utilized as panchromatic photosensitizers for photocatalytic and photoelectrochemical H2 evolution. The effect of the imidazole-anchoring group on the photocatalytic H2 production has been compared with ZnPc-3, which possesses a carboxylic acid unit as the anchoring group. ZnPc-1/TiO2 shows the best photoactivity with the highest H2 evolution rate of 0.4006 mmol g−1 h−1, which is much higher than that of ZnPc-2/TiO2 and ZnPc-3/TiO2 (0.3319 mmol g−1 h−1 and 0.3555 mmol g−1 h−1, respectively). After 20 h of irradiation, ZnPc-1 produces an H2 production rate of 3.4187 mmol g−1 with a turnover number (TON) of 14863 and a solar-to-hydrogen energy (STH) conversion efficiency of 1.03%, without using a co-catalyst. |
| Databáze: | OpenAIRE |
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