2026-10-14T12:45:57Z https://www.scidb.cn/oai

10.57760/sciencedb.00zol 2026-08-17T11:15:36Z

2026-08-17 Effect of H2O/Al(i-OPr)3 Molar Ratio on the Structure and Performance of CuZnAl Catalyst for CO2 Hydrogenation to Methanol doi:10.57760/sciencedb.00zol en CuZnAl catalysts were prepared by precursor complete liquid phase-pyrolysis. The impact of the H2O/Al(i-OPr)3 molar ratio on the catalyst’s structural properties, surface nature, and performance in catalyzing CO2 hydrogenation to methanol was systematically evaluated. The role of H2O/Al(i-OPr)3 molar ratio in modulating the crystal phase composition, specific surface area, reducibility, surface acidity-basicity, and active site distribution of the catalysts was analyzed by XRD, N2 adsorption-desorption, H2-TPR, CO2-TPD, XPS, and In-situ DRIFTS. The results show that H2O/Al(i-OPr)3 molar ratio significantly affects the dispersion and crystallite size of Cu species, thereby modulating the activity and selectivity of the catalysts. Among them, the CZA-103 catalyst achieved a CO2 conversion of approximately 12% and a methanol selectivity of around 40% at 250 ℃, 3.0 MPa, and GHSV of 4000 h−1, with no deactivation observed after more than 120 h on stream, exhibiting the optimal catalytic performance. In-situ DRIFTS analysis indicates that the reaction mainly proceeds via the formate (HCOO*) intermediate pathway. This work reveals how the H2O/Al(i-OPr)3 molar ratio governs the structural regulation of CuZnAl catalysts, thereby furnishing experimental support and theoretical direction for the rational design and optimization of catalysts for CO2 hydrogenation to methanol. CO2 hydrogenation; methanol synthesis; CuZnAl catalyst; precursor complete liquid phase-pyrolysis; structure-performance relationship Wang He Xu Shubin Luan Chunhui Zhang Ye Guo Jianping Huang Wei PUBLIC https://creativecommons.org/licenses/by-nc-nd/4.0/ dataset http://www.doi.org/10.3724/j.issn1001-3555.2026.04.006 Science Data Bank