Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 57, Issue 21, Pages 6104-6108Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201800729
Keywords
carbon dioxide; cobalt; ethanol; heterogeneous catalysis; hydrogenation
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Funding
- National Key Research and Development Program of China [2018YFB060128]
- National Natural Science Foundation of China [91634201, 91645105, 21720102001]
- Natural Science Foundation of Zhejiang Province [LR18B030002]
- Jilin Province/Jilin University co-Construction Project-Funds for New Materials [SXGJSF2017-3, 440050316A36]
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Methods for the hydrogenation of CO2 into valuable chemicals are in great demand but their development is still challenging. Herein, we report the selective hydrogenation of CO2 into ethanol over non-noble cobalt catalysts (CoAlOx), presenting a significant advance for the conversion of CO2 into ethanol as the major product. By adjusting the composition of the catalysts through the use of different prereduction temperatures, the efficiency of CO2 to ethanol hydrogenation was optimized; the catalyst reduced at 600 8 gave an ethanol selectivity of 92.1% at 140 degrees C with an ethanol time yield of 0.444 mmolg(-1) h(-1). Operando FT-IR spectroscopy revealed that the high ethanol selectivity over the CoAlOx catalyst might be due to the formation of acetate from formate by insertion of *CHx, a key intermediate in the production of ethanol by CO2 hydrogenation.
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