Controlling the C2+ product selectivity of electrochemical CO2 reduction on an electrosprayed Cu catalyst,Journal of Materials Chemistry A

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Controlling the C2+ product selectivity of electrochemical CO2 reduction on an electrosprayed Cu catalyst
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2020/02/12 , DOI: 10.1039/c9ta13173f
Si Young Lee _{1,

2,

3,

4,

5} , Sang Youn Chae _{1,

2,

3,

4} , Hyejin Jung _{1,

2,

3,

4,

5} , Chan Woo Lee _{1,

2,

3,

4,

6} , Dang Le Tri Nguyen _{1,

2,

3,

4,

5} , Hyung-Suk Oh _{1,

2,

3,

4,

5} , Byoung Koun Min _{1,

2,

3,

4,

7} , Yun Jeong Hwang _{1,

2,

3,

4,

5}

Affiliation

Cu catalysts prepared by modifying bulk Cu foils have achieved high performance for value-added C2+ compounds from electrochemical CO₂ reduction (CO₂RR) but the transformation of active sites can be affected by the bulk substrate, which make it complex to design the catalyst. Herein, we newly introduce a simple electrospray pyrolysis method to take advantage of a facile wet-chemical synthesis applicable on non-copper substrates, such as a porous carbon paper, and demonstrate highly enhanced selectivity for C₂H₄ production from CO₂RR. The electrosprayed copper oxide on the carbon paper showed uniquely improved C2 selectivity compared with that on the copper substrate. The improved performance is proposed to be related to the presence of Cu mixed state and retention of morphology of the electrosprayed catalyst on the carbon paper, showing the importance of the substrate. In addition, the C2 product selectivity can be tuned by the electrospray synthesis time as it affects the size of the surface nanostructure as well as the porosity of the catalyst, which can provide an effective way to regulate the C2/C1 ratio.

中文翻译：

控制电喷铜催化剂上电化学还原二氧化碳的C2 +产物选择性

通过修改的块Cu箔制备Cu催化剂已经实现高性能的增值C2 +从电化学CO化合物₂减少（CO ₂ RR），但活性位点的转化可以通过体衬底，这使得它的复杂设计催化剂的影响。本文中，我们新引入了一种简单的电喷雾热解方法，以利用适用于非铜基材（例如多孔碳纸）的湿法化学合成方法，并证明从CO ₂制备C ₂ H _4的选择性大大提高。RR。与铜基材上相比，碳纸上的电喷涂氧化铜显示出独特的改善的C2选择性。提出改善的性能与铜混合态的存在和电喷雾催化剂在碳纸上的形态保留有关，这表明了基材的重要性。另外，可以通过电喷雾合成时间来调节C2产物的选择性，因为它影响表面纳米结构的尺寸以及催化剂的孔隙率，这可以提供调节C2 / C1比率的有效方法。

更新日期：2020-04-01

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