Layered double hydroxides (LDHs) were innovatively employed in this study as catalyst for synthesis gas conversion to chemicals, such as oxygenates. Cobalt-aluminium layered double hydroxides (Co-Al LDHs) was prepared at different temperatures. and lactate was successfully intercalated into the LDHs by ion-exchange method and then the material was further delaminated in water at ambient temperature. The samples were characterized by SEM, TEM and AFM, and separately dispersed nanosheets can be clearly observed. The prepared lamellas were applied in aqueous-phase synthesis gas conversion reaction. The catalysts generated a superior activity of 0.055–0.675 ${\text{mol}}_{\text{CO}}·{\text{mol}}_{\text{Co}}^{-1}·{\text{h}}^{-1}$ and greater oxygenated product (acetaldehyde) selectivity (S_Oxy = 75–88%) than conventional cobalt Fisher-Tropsch (FT) synthesis catalysts. Ammonium ion showed some effect of the selectivity of the acetaldehyde. The original research results suggested a promising application of the mono-dispersed ultrathin cobalt-bearing LDHs nanosheets in the aqueous phase syngas conversion to valuable oxygenate products.

在这项研究中，层状双氢氧化物（LDHs）被创新地用作催化剂，用于将合成气转化为化学物质，例如含氧化合物。在不同温度下制备了钴铝层状双氢氧化物（Co-Al LDHs）。乳酸通过离子交换法成功插入LDHs中，然后在室温下进一步分层。通过SEM，TEM和AFM对样品进行表征，可以清楚地观察到分别分散的纳米片。将制备的薄片用于水相合成气转化反应中。催化剂产生了0.055-0.675的优异活性 ${\text{摩尔}}_{\text{一氧化碳}}·{\text{摩尔}}_{\text{有限公司}}^{--\mathrm{1个}}·{\text{H}}^{--\mathrm{1个}}$与 常规钴Fisher-Tropsch（FT）合成催化剂相比，具有更高的氧化产物（乙醛）选择性（S _Oxy = 75-88％）。铵离子显示出乙醛选择性的一些影响。原始研究结果表明，单分散的超薄含钴LDHs纳米片在水相合成气转化为有价值的含氧产物中的应用前景十分广阔。