具有{100}和{111}晶面的氧化铜纳米颗粒用于提高CO电还原制乙烯的选择性和活性。

CuO Nanoparticles with Both {100} and {111} Facets for Enhancing the Selectivity and Activity of CO Electroreduction to Ethylene.

作者信息

Gao Yugang, Wu Qian, Liang Xizhuang, Wang Zeyan, Zheng Zhaoke, Wang Peng, Liu Yuanyuan, Dai Ying, Whangbo Myung-Hwan, Huang Baibiao

机构信息

State Key Laboratory of Crystal Materials Shandong University Jinan 250100 China.

School of Physics Shandong University Jinan 250100 China.

出版信息

Adv Sci (Weinh). 2020 Jan 30;7(6):1902820. doi: 10.1002/advs.201902820. eCollection 2020 Mar.

CuO nanoparticles (NPs) enclosed with different crystal facets, namely, c-CuO NPs with {100} facets, o-CuO NPs with {111} facets, and t-CuO NPs with both {111} and {100} facets, are prepared and their electrocatalytic properties for the reduction of CO to CH are evaluated. It is shown that the selectivity and activity of the CH production depend strongly on the crystal facets exposed in CuO NPs. The selectivities for the CH production increases in the order, c-CuO < o-CuO < t-CuO, (with FE = 38%, 45%, and 59%, respectively). This study suggests that CuO NPs are more likely responsible for the selectivity and activity for the CH production than the metallic Cu NPs produced on the surface of CuO NPs. This work provides a new route for enhancing the selectivity of the electrocatalytic CO reduction by crystal facet engineering.

制备了具有不同晶面的氧化铜纳米颗粒（NPs），即具有{100}面的立方氧化铜纳米颗粒（c-CuO NPs）、具有{111}面的八面体氧化铜纳米颗粒（o-CuO NPs）以及同时具有{111}面和{100}面的截角八面体氧化铜纳米颗粒（t-CuO NPs），并评估了它们将CO还原为CH的电催化性能。结果表明，CH生成的选择性和活性强烈依赖于氧化铜纳米颗粒暴露的晶面。CH生成的选择性按c-CuO < o-CuO < t-CuO的顺序增加（分别对应38%、45%和59%的法拉第效率）。该研究表明，与氧化铜纳米颗粒表面产生的金属铜纳米颗粒相比，氧化铜纳米颗粒更可能对CH生成的选择性和活性负责。这项工作为通过晶面工程提高电催化CO还原的选择性提供了一条新途径。