4.8 Article

Electronic Promotion of Methanol Synthesis over Cu-Loaded ZnO-Based Catalysts

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JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 -, 期 -, 页码 1259-1264

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AMER CHEMICAL SOC
DOI: 10.1021/acs.jpclett.2c034271259J

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Researchers synthesized Zn1-xSixO nanoparticles with tunable work function and carrier concentration by a thermal plasma method. They found that electrically conductive ZSO nanoparticles with a low work function promoted the hydrogenation of CO to methanol, while insulating ZSO nanoparticles with a similar low work function did not. This suggests that efficient electronic promotion plays a key role in low-temperature methanol synthesis.
Methanol, a raw material for C1 chemistry, is industrially produced under harsh conditions using Cu/ZnO-based catalysts. The synthesis of methanol under mild conditions is a challenging subject using an improved catalyst. Here, Zn1-xSixO (ZSO) nanoparticles were synthesized by a thermal plasma method, and their work function and carrier concentration could be tuned by the Zn:Si ratio. The electrically conductive ZSO nanoparticles with a low work function enhanced the donation of electrons to loaded Cu and significantly promoted hydrogenation of CO to methanol, whereas insulating ZSO nanoparticles with a similar low work function did not. These results reveal that efficient electronic promotion by the transfer of electrons from a support to loaded Cu plays a key role in low-temperature methanol synthesis.

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