Abstract
Hydrogenation of the greenhouse gas CO2 to higher alcohols through catalysis holds great promise for resource transformation in low-carbon energy supply system, but the efficient and selective synthesis of value-added ethanol by a robust heterogeneous catalyst under relatively mild conditions remains a major challenge. Based on our previous work on Au/TiO2 as an active and selective catalyst for ethanol synthesis, we report here that a facile photochemical route can be used for the preparation of anatase TiO2 supported gold catalyst (Au/a-TiO2) for efficient hydrogenation of CO2. Compared with the conventional deposition-precipitation method requiring strong brønsted base and flammable H2 gas in the complicated and time-consuming process, the photochemical way for the facile preparation of supported gold catalyst shows the advantages of green and energy-saving. Of significant importance is that an impressive space-time-yield of 869.3 mmol gAu −1 h−1, high selectivity, and excellent stability can be readily attained at 200 °C and total pressure of 6 MPa. The effects of irradiation time, solvent, and metal loading or Au particle size on ethanol synthesis are systematically investigated.
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Acknowledgements
This work was financially supported by the National Key Research and Development Program of China (2016YFB0901600), the NSF of China (61376056 and 51502331), and the STC of Shanghai (14520722000, 16ZR1440400, and 16JC1401700).
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Wang, D., Bi, Q., Yin, G. et al. Photochemical Preparation of Anatase Titania Supported Gold Catalyst for Ethanol Synthesis from CO2 Hydrogenation. Catal Lett 148, 11–22 (2018). https://doi.org/10.1007/s10562-017-2192-4
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Keywords
- Gold catalysis
- Photochemical route
- Anatase titania
- Ethanol
- CO2 hydrogenation