A series of Cu–ZnO–ZrO₂ catalysts were prepared at different pH by co‐precipitation method and tested for the synthesis of methanol by CO₂ hydrogenation. The influence of pH on the phase formation of precursor, the average Cu particle size and the interaction among different elements were discussed in detail. The activity and selectivity of the catalysts were tested for hydrogenation of carbon dioxide to methanol. When the precipitation was conducted at pH = 8.0, in addition to aurichalcite, Zn‐malachite was obviously present in the precursor and the resulting catalysts were more active. It was found that the pH exerts its effect through altering the phase composition of the precursors. The present of Zn‐malachite in the precursors facilitates the formation of more intimate interdispersion of CuO and ZnO, and the smallest Cu particle after calcination and reduction.

中文翻译：

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pH值对用于CO2加氢的共沉淀Cu-ZnO-ZrO2催化剂的影响：前孔中锌孔雀石的作用▴

通过共沉淀法制备了一系列在不同pH下的Cu-ZnO-ZrO ₂催化剂，并测试了CO ₂合成甲醇的能力。氢化。详细讨论了pH对前驱物相形成，平均Cu粒径和不同元素之间相互作用的影响。测试了催化剂的活性和选择性，以将二氧化碳氢化成甲醇。当在pH = 8.0进行沉淀时，除了金铝矾石外，前体中显然还存在锌孔雀石，且所得催化剂的活性更高。发现pH通过改变前体的相组成而发挥其作用。前体中存在的锌孔雀石有利于形成更紧密的CuO和ZnO相互分散，以及煅烧和还原后最小的Cu颗粒。