The effect of Ba, Ce, Cs and La as co-metals in Cu/γ-Al₂O₃ catalysts for the hydrogenolysis of glycerol into 1,2-propanediol was investigated at industrially relevant reaction conditions over time. The addition of Ba or Ce increased the initial activity per Cu⁰ accessible site. Apart from Cs, the co-metals increased the selectivity towards 1,2-propanediol, up to 96% (Ba). The co-metals inhibited sintering and stabilized the Cu particle size during reaction, by decreasing the particle growth by a factor of 10. Overall, co-metals mainly influenced the selectivity and stabilized the Cu particle.

中文翻译：

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共金属诱导的氧化铝负载的铜的稳定化：对甘油氢解为1,2-丙二醇的影响

钡，铈，铯和La的作为在铜/γ-Al系合金属的影响₂ ö ₃催化剂用于甘油氢解成1,2-丙二醇在随着时间的推移工业相关的反应条件进行了研究。Ba或Ce的添加增加了每个Cu ⁰可及部位的初始活性。除铯外，共金属还提高了对1,2-丙二醇的选择性，最高可达96％（Ba）。共金属通过将颗粒生长减少10倍来抑制反应过程中的烧结并稳定Cu颗粒尺寸。总的来说，共金属主要影响选择性并稳定Cu颗粒。