Promoting low-temperature methanol production over mixed oxide supported Cu catalysts: Coupling ceria-promotion and photo-activation

Xie, Bingqiao ¹Tan, Tze Hao ¹Kalantar-Zadeh, Kourosh ¹Zheng, Jiewei ¹Kumar, Priyank ¹Jiang, Junjie ¹Zhou, Shujie ¹Scott, Jason ¹Amal, Rose¹

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作者信息

1. UNSW Sydney
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Abstract

Catalytic methanol production from CO2 hydrogenation at a lower temperature is limited, predominantly constricted by sluggish reaction kinetics. In this work, a ceria-modified Cu/ZnO/Al2O3 catalyst (CuZnCe-Al) is fabricated which delivers efficient low-temperature methanol production (yield= 822 g/kg(Cu)/h and selectivity = 94% at 225 C and 20 bar) under light illumination. The influence of ceria loading on the morphology/microstructure, interfacial features, and surface chemistry of a Cu/ZnO-based catalyst is systematically assessed. Incorporating ceria (<= 10 at%) into ZnO initially forms ZnO/CeOx interface which promotes both CO2 chemisorption and the formate-pathway which favours methanol production over CO. Increasing the ceria loading beyond 10 at% invoked a Cu/CeOx-dominated structure, leading to over-stabilisation of the surface reaction species and a decreased preference for methanol. The photo-enhancement factor observed for each CuZnxCey catalysts is largely independent of the ceria loading, implying that ceria inclusion imposed little influence on the Cu-ZnO interfacial characteristics.

Key words

Methanol production/Oxide interface chemistry/Photo-activation/High-pressure DRIFTS/COPPER-CERIA/CO2 HYDROGENATION/SURFACE/FUNCTIONALITY/OXIDATION

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量6

参考文献量46

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