Ultra-Thin ZrO2 overcoating on CuO-ZnO-Al2O3 Catalyst by Atomic Layer Deposition for Improved Catalytic Performance of CO2 Hydrogenation to Dimethyl Ether
An Ultra-Thin overcoating of Zirconium Oxide (ZrO2) Film on CuO-ZnO-Al2O3 (CZA) Catalysts by Atomic Layer Deposition (ALD) Was Proved to Enhance the Catalytic Performance of CZA/HZSM-5 (H Form of Zeolite Socony Mobil-5) Bifunctional Catalysts for Hydrogenation of CO2 to Dimethyl Ether (DME). under Optimal Reaction Conditions (I.e. 240 °C and 2.8 MPa), the Yield of Product DME Increased from 17.22% for the Bare CZA/HZSM-5 Catalysts, to 18.40% for the CZA Catalyst after 5 Cycles of ZrO2 ALD with HZSM-5 Catalyst. All the Catalysts Modified by ZrO2 ALD Displayed Significantly Improved Catalytic Stability of Hydrogenation of CO2 to DME Reaction, Compared to that of CZA/HZSM-5 Bifunctional Catalysts. the Loss of DME Yield in 100 H of Reaction Was Greatly Mitigated from 6.20% (Loss of Absolute Value) to 3.01% for the CZA Catalyst with 20 Cycles of ZrO2 ALD overcoating. Characterizations Including Hydrogen Temperature Programmed Reduction, X-Ray Powder Diffraction, and X-Ray Photoelectron Spectroscopy Revealed that There Was Strong Interaction between Cu Active Centers and ZrO2
X. Fan et al., "Ultra-Thin ZrO2 overcoating on CuO-ZnO-Al2O3 Catalyst by Atomic Layer Deposition for Improved Catalytic Performance of CO2 Hydrogenation to Dimethyl Ether," Nanotechnology, vol. 34, no. 23, article no. 235401, IOP Publishing, Jun 2023.
The definitive version is available at https://doi.org/10.1088/1361-6528/acc036
Chemical and Biochemical Engineering
Keywords and Phrases
atomic layer deposition; CO hydrogenation 2; Cu-ZnO-Al O /HZSM-5 2 3; DME synthesis; ZrO 2
International Standard Serial Number (ISSN)
Article - Journal
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04 Jun 2023
National Science Foundation, Grant CBET 2306177