Highly efficient hydrogenation of carbon dioxide to methyl formate over supported gold catalysts
Highly efficient hydrogenation of carbon dioxide to methyl formate over supported gold catalysts
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DOI：
10.1039/c4gc01818d
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发表时间：
2015-03
期刊：
影响因子：
9.8
通讯作者：
Congyi Wu;Zhaofu Zhang;Qinggong Zhu;Hongling Han;Yingying Yang;B. Han
中科院分区：
文献类型：
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作者：
Congyi Wu;Zhaofu Zhang;Qinggong Zhu;Hongling Han;Yingying Yang;B. Han
将二氧化碳(CO2)转化为有价值的化学物质是绿色化学中一个有趣的话题。在甲醇存在下，二氧化碳加氢合成甲酸甲酯(MF)是一个重要的反应。本工作制备了不同载体上的Au纳米催化剂，并用X射线衍射仪、透射电子显微镜和X射线光电子能谱对其进行了表征。考察了催化剂对该反应的催化性能。结果表明，在没有任何碱性添加剂的情况下，Au/ZrO2、Au/CeO2和Au/TiO2三种催化剂对反应具有很高的活性和选择性。当载体上的Au颗粒尺寸相近时，Au/ZrO2的催化活性高于Au/CeO2和Au/TiO2.此外，对于Au/ZrO2催化剂，粒径较小的Au颗粒具有较高的活性。提出了该催化反应的可能机理。
Transformation of carbon dioxide (CO2) into valuable chemicals is an interesting topic in green chemistry. Hydrogenation of CO2 to methyl formate (MF) in the presence of methanol is an important reaction. In this work, Au nanocatalysts immobilized on different supports were prepared and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectrometry (XPS). The catalytic performances of the catalysts for the reaction were studied. It was demonstrated that the Au/ZrO2, Au/CeO2 and Au/TiO2 were very active and selective for the reaction in the absence of any basic additives. The Au/ZrO2 was more active than Au/CeO2 and Au/TiO2 if the sizes of Au particles on the supports were similar. Moreover, for the Au/ZrO2 catalysts, Au particles with smaller size had higher activity. The possible mechanism of the catalytic reaction was proposed.