Efficient Hydrogenation of CO2 to Methanol over Supported Subnanometer Gold Catalysts at Low Temperature
Efficient Hydrogenation of CO2 to Methanol over Supported Subnanometer Gold Catalysts at Low Temperature
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负载型亚纳米金催化剂低温下高效加氢制甲醇
DOI：
10.1002/cctc.201700872
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发表时间：
2017
期刊：
影响因子：
4.5
通讯作者：
Han Buxing
中科院分区：
文献类型：
--
作者：
Wu Congyi;Zhang Peng;Zhang Zhaofu;Zhang Lujun;Yang Guanying;Han Buxing
在较温和的条件下，二氧化碳直接加氢制甲醇是非常重要的。研究了不同尺寸的金颗粒在不同载体上对该反应的催化性能。结果表明，催化剂的催化性能与Au颗粒的大小和载体的组成有关。亚纳米级Au颗粒（1.6 nm）的Au/ZrO2具有前所未有的高催化活性和优异的反应选择性，即使在140℃也能得到甲醇，明显低于之前报道的温度。采用亚纳米Au颗粒制备的Au/ZrO2具有优异的性能，一方面是因为Au颗粒的体积非常小，另一方面是因为Au颗粒与载体之间具有良好的耦合关系。
Direct hydrogenation of CO2 to methanol under milder conditions is of great importance. The catalytic performances of Au particles with different sizes on various supports for this reaction were studied. It was demonstrated that catalytic properties of the catalysts depended both on size of Au particles and the composition of the supports. Au/ZrO2 with subnanometer Au particles (1.6 nm) had unprecedented high catalytic activity and excellent selectivity for the reaction, and methanol could be obtained even at 140 °C, which is obviously lower than those reported before. The outstanding performance of the Au/ZrO2 with subnanometer Au particles resulted from both the very small size of the Au particles and appropriate coupling between the Au particles and the support.