催化作用
法拉第效率
电化学
电解
乙二胺
氨生产
材料科学
氨
无机化学
化学工程
沉积(地质)
化学
电解质
电极
物理化学
有机化学
古生物学
工程类
生物
沉积物
作者
Yu Seok Ham,Senyon Choe,Myung Joon Kim,Taeho Lim,Soo-Kil Kim,Jae Jeong Kim
标识
DOI:10.1016/j.apcatb.2017.02.040
摘要
For the electrochemical reduction of CO2 to CO, a dendrite-type Ag catalyst was fabricated via an electrodeposition method in an ammonia-based Ag deposition solution containing ethylenediamine (EN) as an additive. The influence of electrodeposition parameters on the properties of this catalyst was examined and further correlated with CO production efficiency. The addition of EN changed the intensity ratio of (220) vs. (111) planes in the Ag catalyst, which was shown to be proportional to the CO production activity. Furthermore, EN modified the chemical shift of Ag3d5/2 in the negative direction, increasing the CO production efficiency. Under optimized deposition conditions (–0.45 V vs. Ag/AgCl, 40 mM EN), which were a compromise between intensity ratio and chemical shift, the fabricated Ag catalysts exhibited the highest Faradaic efficiency and mass activity for CO during CO2 electrolysis in 0.5 M KHCO3. The experimental correlation between CO production efficiency and the crystalline/electronic structures of the catalyst suggested guidelines for further improving the Ag catalyst activity.
科研通智能强力驱动
Strongly Powered by AbleSci AI