Synergistic effect of zirconia oxygen vacancies and Cu nanoparticles on catalytic conversion of CO<sub>2</sub> to CO at low temperatures
<p dir="ltr">Converting <u>carbon dioxide</u> into valuable chemicals requires suitable catalysts to perform efficiently under severe reaction conditions. Developing suitable supported <u>copper catalysts</u> can potentially improve catalytic performance for C...
محفوظ في:
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| مؤلفون آخرون: | , |
| منشور في: |
2024
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إضافة وسم
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| الملخص: | <p dir="ltr">Converting <u>carbon dioxide</u> into valuable chemicals requires suitable catalysts to perform efficiently under severe reaction conditions. Developing suitable supported <u>copper catalysts</u> can potentially improve catalytic performance for CO<sub>2</sub> reduction by interacting with copper active components. Herein, we investigate Cu/ZrO<sub>2</sub> catalysts, synthesized by wet-impregnation (WI) method with various copper contents, for the reverse water-gas shift (RWGS) reaction. It is anticipated that metal-support interaction, <u>surface defects</u>, and <u>oxygen vacancies</u> in <u>oxide</u> catalysts play critical roles in defining catalytic activity. To understand this, various ZrO<sub>2</sub>-supported catalysts with different <u>crystallite sizes</u> were prepared by altering the <u>calcination</u> temperature and assessing their catalytic performance. The results showed that 2 wt%Cu/ZrO<sub>2</sub> catalyst calcined at 800 °C had the highest CO<sub>2</sub> conversion to CO of ∼37 % at 600 °C, with less than 0.25 % coke formation. <u>Kinetics studies</u> showed that the redox model agreed better with experimental data when considering equilibrium conditions.</p><h2>Other Information</h2><p dir="ltr">Published in: International Journal of Hydrogen Energy<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.ijhydene.2024.01.193" target="_blank">https://dx.doi.org/10.1016/j.ijhydene.2024.01.193</a></p> |
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