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High-Performance Cu/ZnO/Al2O3 Catalysts for CO2 Hydrogenation to Methanol
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2024-03-28 , DOI: 10.1021/acs.iecr.4c00357 Heng Zhang 1 , Jiyi Chen 2 , Xiaoyu Han 1, 3 , Yutong Pan 1 , Ziwen Hao 2 , Shixiong Tang 1 , Xiaohui Zi 1 , Zhenmei Zhang 2 , Pengju Gao 1 , Maoshuai Li 1 , Jing Lv 1 , Xinbin Ma 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2024-03-28 , DOI: 10.1021/acs.iecr.4c00357 Heng Zhang 1 , Jiyi Chen 2 , Xiaoyu Han 1, 3 , Yutong Pan 1 , Ziwen Hao 2 , Shixiong Tang 1 , Xiaohui Zi 1 , Zhenmei Zhang 2 , Pengju Gao 1 , Maoshuai Li 1 , Jing Lv 1 , Xinbin Ma 1
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Cu/ZnO/Al2O3 catalysts are widely used in methanol synthesis due to their low cost and high catalytic activity. The structural and surface characteristics of Cu are crucial to the formation of the active sites for methanol production. In this study, a series of methods for the synthesis of Cu/ZnO/Al2O3 are employed to modulate the catalyst structure and catalytic efficiency for the hydrogenation of CO2 to methanol. A correlation of catalytic activity with the Cu0 surface area and Cu particle sizes has been established. The Cu/ZnO/Al2O3 catalyst derived from hydrotalcite-like precursor (CZA-LDH) exhibits the maximum Cu0 specific surface area, the smallest Cu particle size, and high dispersion of elements, yielding the largest methanol production rate, which is comparable to the commercial Cu catalyst. Stability testing shows that the CZA-LDH catalyst can retain ∼94% of the initial activity. The in situ Fourier transform infrared spectroscopy analysis indicates that HCOO*, CH3O* intermediates, and product CH3OH are generated on the catalyst surface, and the reaction follows the formate pathway.
中文翻译：
用于 CO2 加氢制甲醇的高性能 Cu/ZnO/Al2O3 催化剂
Cu/ZnO/Al 2 O 3催化剂因其成本低、催化活性高而广泛应用于甲醇合成。 Cu的结构和表面特征对于甲醇生产活性位点的形成至关重要。本研究采用一系列Cu/ZnO/Al 2 O 3的合成方法来调节CO 2加氢制甲醇的催化剂结构和催化效率。已经建立了催化活性与Cu 0表面积和Cu颗粒尺寸的相关性。由类水滑石前驱体衍生的Cu/ZnO/Al 2 O 3催化剂(CZA-LDH)表现出最大的Cu 0比表面积、最小的Cu粒径和高元素分散度，产生最大的甲醇产率，与商业铜催化剂相当。稳定性测试表明CZA-LDH催化剂可以保留~94%的初始活性。原位傅里叶变换红外光谱分析表明，催化剂表面生成HCOO*、CH 3 O*中间体和产物CH 3 OH，反应遵循甲酸酯途径。
更新日期：2024-03-28
中文翻译：
用于 CO2 加氢制甲醇的高性能 Cu/ZnO/Al2O3 催化剂
Cu/ZnO/Al 2 O 3催化剂因其成本低、催化活性高而广泛应用于甲醇合成。 Cu的结构和表面特征对于甲醇生产活性位点的形成至关重要。本研究采用一系列Cu/ZnO/Al 2 O 3的合成方法来调节CO 2加氢制甲醇的催化剂结构和催化效率。已经建立了催化活性与Cu 0表面积和Cu颗粒尺寸的相关性。由类水滑石前驱体衍生的Cu/ZnO/Al 2 O 3催化剂(CZA-LDH)表现出最大的Cu 0比表面积、最小的Cu粒径和高元素分散度，产生最大的甲醇产率，与商业铜催化剂相当。稳定性测试表明CZA-LDH催化剂可以保留~94%的初始活性。原位傅里叶变换红外光谱分析表明，催化剂表面生成HCOO*、CH 3 O*中间体和产物CH 3 OH，反应遵循甲酸酯途径。
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