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摘要
Although dye-sensitized TiO2 for photocatalytic H-2 production have been investigated for more than 20 years, research on using low-cost transition metal complexes as catalysts for proton reduction on TiO2 is still relatively rare. In this paper, three cobalt complexes (CoL1-CoL3) were prepared and used as hydrogen evolution catalysts, and a noblemetal- free H-2-evolving systemwas fabricated by using an organic dye, eosin Y (EY), as photosensitizer and triethylamine (TEA) as sacrificial agent. Under visible light irradiation, a turnover number of 90 (based on CoL2) was obtained for 2 wt% CoL2/TiO2 within 6 h in aqueous solution under the optimal conditions of 4 mu mol EY, 5% TEA (v/v) and pH 11. In addition, much higher hydrogen production efficiency and stability were achieved for the heterogeneous system, in comparison with the homogeneous one.
- 出版日期2015
- 单位郑州大学
