Prism-Shaped Cu Nanocatalysts for Electrochemical CO2 Reduction to Ethylene
Prism-Shaped Cu Nanocatalysts for Electrochemical CO2 Reduction to Ethylene
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DOI：
10.1021/acscatal.7b02959
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发表时间：
2018-01-01
期刊：
影响因子：
12.9
通讯作者：
Roldan Cuenya, Beatriz
中科院分区：
文献类型：
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作者：
Jeon, Hyo Sang;Kunze, Sebastian;Roldan Cuenya, Beatriz
电化学CO2还原由于其将CO2气体转化为有用的化学品和燃料的有利能力而引起了人们的广泛关注。在此，我们已经开发了棱柱形铜催化剂，用于高效和稳定的CO2电还原，通过使用电沉积方法。这些铜棱镜电极，其特征在于通过扫描电子显微镜，X射线衍射，和X射线光电子能谱。电化学CO2还原测量显示了C2 H4生产的改进活性，具有-11.8 mA/cm（2）的高部分电流密度，其比平面Cu样品的部分电流密度（-2.8 mA/cm（2））高四倍以上。我们已经证明，增强的C2 H4生产部分归因于更高的密度的缺陷位点上的粗糙化的铜棱镜表面。此外，稳定性测试显示在维持C2 H4生产超过12小时方面的显著改善。棱柱铜催化剂的增强性能和耐久性为未来的工业应用带来了希望。
Electrochemical CO2 reduction has attracted much attention, because of its advantageous ability to convert CO2 gas to useful chemicals and fuels. Herein, we have developed prism-shaped Cu catalysts for efficient and stable CO2 electroreduction by using an electrodeposition method. These Cu prism electrodes were characterized by scanning electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Electrochemical CO2 reduction measurements show improved activities for C2H4 production with a high partial current density of -11.8 mA/cm(2), which is over four times higher than that of the planar Cu sample (-2.8 mA/cm(2)). We have demonstrated that the enhanced C2H4 production is partially attributed to the higher density of defect sites available on the roughened Cu prism surface. Furthermore, stability tests show a drastic improvement in maintaining C2H4 production over 12 h. The enhanced performance and durability of prism Cu catalysts hold promise for future industrial applications.