Exploring the ternary interactions in Cu–ZnO–ZrO2 catalysts for efficient CO2 hydrogenation to methanol

• Published in: Nature communications Vol. 10; no. 1; pp. 1166 - 10
• Main Authors: Wang, Yuhao, Kattel, Shyam, Gao, Wengui, Li, Kongzhai, Liu, Ping, Chen, Jingguang G., Wang, Hua
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 11.03.2019; Nature Publishing Group; Nature Portfolio
• Subjects: 639/638/77/885; 639/638/77/887; 639/638/898; Carbon dioxide; Catalysis; Catalysts; catalytic mechanisms; chemical engineering; Copper; Density functional theory; Diffuse reflectance spectroscopy; Fourier transforms; heterogeneous catalysis; Humanities and Social Sciences; Hydrogen storage; Hydrogenation; INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Interfaces; Methanol; multidisciplinary; Science; Science (multidisciplinary); Zinc oxide; Zirconium dioxide
• ISSN: 2041-1723; 2041-1723
• DOI: 10.1038/s41467-019-09072-6

The synergistic interaction among different components in complex catalysts is one of the crucial factors in determining catalytic performance. Here we report the interactions among the three components in controlling the catalytic performance of Cu–ZnO–ZrO 2 (CZZ) catalyst for CO 2 hydrogenation to methanol. The in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) measurements under the activity test pressure (3 MPa) reveal that the CO 2 hydrogenation to methanol on the CZZ catalysts follows the formate pathway. Density functional theory (DFT) calculations agree with the in situ DRIFTS measurements, showing that the ZnO–ZrO 2 interfaces are the active sites for CO 2 adsorption and conversion, while the presence of metallic Cu is also necessary to facilitate H 2 dissociation and to provide hydrogen resource. The combined experiment and DFT results reveal that tuning the interaction between ZnO and ZrO 2 can be considered as another important factor for designing high performance catalysts for methanol generation from CO 2 . Despite great efforts, the reaction mechanism of CO 2 hydrogenation to methanol and the nature of the active sites on Cu–ZnO–ZrO 2 (CZZ) catalysts are still under debate. Herein, the authors report the interactions among the three components in controlling the catalytic performance of CZZ catalyst for CO 2 hydrogenation to methanol.