Flame Synthesis of Cu/ZnO-CeO Catalysts: Synergistic Metal-Support Interactions Promote CHOH Selectivity in CO Hydrogenation

Overview

Journal ACS Catal

Publisher American Chemical Society

Date 2021 Apr 26

PMID 33898079

Citations 6

Authors

Jiadong Zhu

Diana Ciolca

Liang Liu

Alexander Parastaev

Nikolay Kosinov

Emiel J M Hensen

Affiliations

Soon will be listed here.

Abstract

The hydrogenation of CO to CHOH is an important reaction for future renewable energy scenarios. Herein, we compare Cu/ZnO, Cu/CeO, and Cu/ZnO-CeO catalysts prepared by flame spray pyrolysis. The Cu loading and support composition were varied to understand the role of Cu-ZnO and Cu-CeO interactions. CeO addition improves Cu dispersion with respect to ZnO, owing to stronger Cu-CeO interactions. The ternary Cu/ZnO-CeO catalysts displayed a substantially higher CHOH selectivity than binary Cu/CeO and Cu/ZnO catalysts. The high CHOH selectivity in comparison with a commercial Cu-ZnO catalyst is also confirmed for Cu/ZnO-CeO catalyst prepared with high Cu loading (∼40 wt %). In situ IR spectroscopy was used to probe metal-support interactions in the reduced catalysts and to gain insight into CO hydrogenation over the Cu-Zn-Ce oxide catalysts. The higher CHOH selectivity can be explained by synergistic Cu-CeO and Cu-ZnO interactions. Cu-ZnO interactions promote CO hydrogenation to CHOH by Zn-decorated Cu active sites. Cu-CeO interactions inhibit the reverse water-gas shift reaction due to a high formate coverage of Cu and a high rate of hydrogenation of the CO intermediate to CHOH. These insights emphasize the potential of fine-tuning metal-support interactions to develop improved Cu-based catalysts for CO hydrogenation to CHOH.

Citing Articles

Controlling Metal-Support Interactions to Engineer Highly Active and Stable Catalysts for CO Hydrogenation.

Chen S ChemSusChem. 2024; 18(3):e202401437.

PMID: 39535427 PMC: 11790005. DOI: 10.1002/cssc.202401437.

Efficient reverse water gas shift reaction at low temperatures over an iron supported catalyst under an electric field.

Yamaoka M, Tomozawa K, Sumiyoshi K, Ueda T, Ogo S Sci Rep. 2024; 14(1):10216.

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Morphologically tuned CuO-ZnO-CeO catalyst for CO hydrogenation to methanol.

Kanuri S, Singh S, Uttaravalli A, Roy S, Dinda S RSC Adv. 2024; 14(14):10024-10033.

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A Ce-CuZn catalyst with abundant Cu/Zn-O-Ce active sites for CO hydrogenation to methanol.

Ye R, Ma L, Mao J, Wang X, Hong X, Gallo A Nat Commun. 2024; 15(1):2159.

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Highly Selective CO Hydrogenation to Methanol over Complex In/Co Catalysts: Effect of Polymer Frame.

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