Synthesis, characterization and in situ DRIFTS during the CO2 hydrogenation reaction over supported cobalt catalysts

Das, Taraknath; Deo, Goutam

doi:10.1016/j.molcata.2011.09.008

Cited by 80 publications

(48 citation statements)

References 30 publications

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“…Theb ands at 1038 and 1362 cm À1 correspond to ethoxy species,a nd the bands at 1471, 1584, and 2895 cm À1 were assigned to acetate species. [9][10][11] All of these data confirm the formation of ethoxy and acetate species on CoAlO x -600 by CO 2 hydrogenation, which are regarded as important intermediates for ethanol production. Similar bands assign- able to oxygenated C 2 intermediates were also observed in the in situ IR spectra recorded for CO 2 hydrogenation over CoAlO x -500 and CoAlO x -650 catalysts.Itseems that the Co-CoO x phases are important in the formation of oxygenated C 2 intermediates,a nd CoAlO x -400 without metallic Co phases gave very weak bands for oxygenated C 2 intermediates (Figures 4b and S20), which might explain the relatively low ethanol selectivity and productivity over the CoAlO x -400 catalyst compared with those over CoAlO x -500, CoAlO x -600, and CoAlO x -650.…”

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confidence: 55%

Selective Hydrogenation of CO₂ to Ethanol over Cobalt Catalysts

et al. 2018

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Methods for the hydrogenation of CO into valuable chemicals are in great demand but their development is still challenging. Herein, we report the selective hydrogenation of CO into ethanol over non-noble cobalt catalysts (CoAlO ), presenting a significant advance for the conversion of CO into ethanol as the major product. By adjusting the composition of the catalysts through the use of different prereduction temperatures, the efficiency of CO to ethanol hydrogenation was optimized; the catalyst reduced at 600 ° gave an ethanol selectivity of 92.1 % at 140 °C with an ethanol time yield of 0.444 mmol g h . Operando FT-IR spectroscopy revealed that the high ethanol selectivity over the CoAlO catalyst might be due to the formation of acetate from formate by insertion of *CH , a key intermediate in the production of ethanol by CO hydrogenation.

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confidence: 55%

Selective Hydrogenation of CO₂ to Ethanol over Cobalt Catalysts

et al. 2018

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“…Instead two weak features at 570 and 643 nm were observed. The assignment of these two weak features were previously observed and still remains unclear [47]. The UV-vis spectra were also obtained for the reduced samples and no features were observed other than those at 570 and 643 nm.…”

Section: Uv-vis Spectra Analysismentioning

confidence: 61%

Modifying alumina with CaO or MgO in supported Ni and Ni–Co catalysts and its effect on dry reforming of CH4

Sengupta

Deo

2015

Journal of CO2 Utilization

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“…Hence, low‐cost, highly efficient and sustainable catalysts for methanol synthesis are required to better utilize CO 2 . Metallic Cu, Co, and Ni are widely used as the active species for CO 2 hydrogenation reaction and Cu is especially more beneficial for methanol formation from CO 2 hydrogenation than Co and Ni . However, the catalytic activity of a pure copper catalyst is almost negligible.…”

Section: Introductionmentioning

confidence: 99%

A novel Core–Shell structured CuIn@SiO₂ catalyst for CO₂ hydrogenation to methanol

Shi

Tan

2018

AIChE Journal

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CO 2 hydrogenation is one of the most promising processes in response to energy crisis and greenhouse gas emission. There is, however, still a lack of a highly efficient and sustainable catalyst for this reaction. In this study, a novel low-cost coreshell structured CuIn@SiO 2 catalyst is prepared by a solvothermal method and used for catalyzing CO 2 hydrogenation to methanol. A significant interaction exists between Cu and In, promoting Cu dispersion and reducibility, Cu 2 In alloy and oxygen vacancy formation. Moreover, plenty of interfacial sites are formed between Cu 2 In and In 2 O 3 , which further enhances CO 2 adsorption and activation. CuIn@SiO 2 , therefore, shows not only a satisfactory catalytic stability due to core-shell formation but also an excellent catalytic performance. 9.8% CO 2 conversion, 78.1% CH 3 OH selectivity, and 13.7 mmol CH 3 OH Áh −1 Ág cat −1 CH 3 OH space-time yield are obtained at the space velocity of 20,000 mLÁg cat −1 Áh −1 . CuIn@SiO 2 possesses a great potential as catalyst for CO 2 hydrogenation in a moderate condition in industry.

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Synthesis, characterization and in situ DRIFTS during the CO2 hydrogenation reaction over supported cobalt catalysts

Cited by 80 publications

References 30 publications

Selective Hydrogenation of CO₂ to Ethanol over Cobalt Catalysts

Selective Hydrogenation of CO₂ to Ethanol over Cobalt Catalysts

Modifying alumina with CaO or MgO in supported Ni and Ni–Co catalysts and its effect on dry reforming of CH4

A novel Core–Shell structured CuIn@SiO₂ catalyst for CO₂ hydrogenation to methanol

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Synthesis, characterization and in situ DRIFTS during the CO2 hydrogenation reaction over supported cobalt catalysts

Cited by 80 publications

References 30 publications

Selective Hydrogenation of CO2 to Ethanol over Cobalt Catalysts

Selective Hydrogenation of CO2 to Ethanol over Cobalt Catalysts

Modifying alumina with CaO or MgO in supported Ni and Ni–Co catalysts and its effect on dry reforming of CH4

A novel Core–Shell structured CuIn@SiO2 catalyst for CO2 hydrogenation to methanol

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Selective Hydrogenation of CO₂ to Ethanol over Cobalt Catalysts

Selective Hydrogenation of CO₂ to Ethanol over Cobalt Catalysts

A novel Core–Shell structured CuIn@SiO₂ catalyst for CO₂ hydrogenation to methanol