Topological transformation of layered double hydroxides (LDHs) containing bimetal components is a powerful method for producing bimetal catalysts, but suffers from uncontrollable bimetal structures and catalytically active sites due to the indistinct mechanism. This work demonstrates the manipulation of CuCo structure by simply changing the aspect ratio or Cu/Co distribution (one in layer and the other in interlayer) of LDHs, affording (i) exclusive Janus Cu‐Co particles or well‐alloyed CuCo particles and (ii) CuCo alloy with Janus Cu‐Co, monometallic Co, or monometallic Cu coexisting. The mesoscale key factor in the topological transformation is revealed. In the syngas conversion, the selectivity to alcohol reaches 49.3% and 43.2% with C2+ alcohol fraction of >94% on well‐alloyed CuCo and Janus Cu‐Co particles with good affinity of Cu‐Co sites. But the presence of monometallic Co or Cu suppresses alcohol selectivity or C2+ alcohol fraction by facilitating the production of hydrocarbons or methanol, respectively.

中文翻译：

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通过层状双氢氧化物的拓扑转变在介尺度上纵 CuCo 的双金属结构


含有双金属组分的层状双氢氧化物 （LDH） 的拓扑转变是生产双金属催化剂的有力方法，但由于机理不明确，双金属结构和催化活性位点不可控。这项工作展示了通过简单地改变 LDH 的纵横比或 Cu/Co 分布（一个在层内，另一个在层间）来纵 CuCo 结构，从而得到 （i） 排他性的 Janus Cu-Co 颗粒或合金化良好的 CuCo 颗粒和 （ii） CuCo 合金与 Janus Cu-Co、单金属 Co 或单金属 Cu 共存。揭示了拓扑变换中的介尺度关键因素。在合成气转化中，对醇的选择性达到 49.3% 和 43.2%，C2+ 醇含量为 >94%，对合金良好的 CuCo 和 Janus Cu-Co 颗粒具有良好的 Cu-Co 位点亲和力。但是，单金属 Co 或 Cu 的存在分别通过促进碳氢化合物或甲醇的产生来抑制醇选择性或 C2+ 醇馏分。