期刊
SMALL
卷 15, 期 17, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201900289
关键词
Au-CeOx nanosheets; Ce3+ engineering; CO2 activation; CO2 electroreduction
类别
资金
- National Key R&D Program of China [2016YFB0600901]
- National Natural Science Foundation of China [U1463205, 21525626, 21606169]
- Program of Introducing Talents of Discipline to Universities [B06006]
The electroreduction of CO2 to CO provides a potential way to solve the environmental problems caused by excess fossil fuel utilization. Loading transition metals on metal oxides is an efficient strategy for CO2 electroreduction as well as for reducing metal usage. However, it needs a great potential to overcome the energy barrier to increase CO selectivity. This paper describes how 8.7 wt% gold nanoparticles (NPs) loaded on CeOx nanosheets (NSs) with high Ce3+ concentration effectively decrease the overpotential for CO2 electroreduction. The 3.6 nm gold NPs on CeOx NSs containing 47.3% Ce3+ achieve CO faradaic efficiency of 90.1% at -0.5 V in 0.1 m KHCO3 solution. Furthermore, the CO2 electroreduction activity shows a strong relationship with the fractions of Ce3+ on Au-CeOx NSs, which has never been reported. In situ surface-enhanced infrared absorption spectroscopy shows that Au-CeOx NSs with high Ce3+ concentration promote CO2 activation and *COOH formation. Theoretical calculations also indicate that the improved performance is attributed to the enhanced *COOH formation on Au-CeOx NSs with high Ce3+ fraction.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据