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


Chemical and Biochemical Engineering


National Science Foundation, Grant CBET 2306177

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)

1361-6528; 0957-4484

Document Type

Article - Journal

Document Version


File Type





© 2023 IOP Publishing, All rights reserved.

Publication Date

04 Jun 2023

PubMed ID