Abundant Ce 3+  Ions in Au‐CeO  x   Nanosheets to Enhance CO 2  Electroreduction Performance | Zendy

Dong Hao | Zendy; Zhang Lei | Zendy; Li Lulu | Zendy; Deng Wanyu | Zendy; Hu Congling | Zendy; Zhao ZhiJian | Zendy; Gong Jinlong | Zendy

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Abundant Ce 3+ Ions in Au‐CeO x Nanosheets to Enhance CO 2 Electroreduction Performance

Author(s) -

Dong Hao,

Zhang Lei,

Li Lulu,

Deng Wanyu,

Hu Congling,

Zhao ZhiJian,

Gong Jinlong

Publication year - 2019

Publication title -

small

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.785

H-Index - 236

eISSN - 1613-6829

pISSN - 1613-6810

DOI - 10.1002/smll.201900289

Subject(s) - overpotential , faraday efficiency , materials science , transition metal , selectivity , electrochemistry , metal , catalysis , nanoparticle , absorption (acoustics) , ion , inorganic chemistry , electrode , chemistry , nanotechnology , metallurgy , biochemistry , organic chemistry , composite material

The electroreduction of CO 2 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 CO 2 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 CeO x nanosheets (NSs) with high Ce 3+ concentration effectively decrease the overpotential for CO 2 electroreduction. The 3.6 nm gold NPs on CeO x NSs containing 47.3% Ce 3+ achieve CO faradaic efficiency of 90.1% at −0.5 V in 0.1 m KHCO 3 solution. Furthermore, the CO 2 electroreduction activity shows a strong relationship with the fractions of Ce 3+ on Au‐CeO x NSs, which has never been reported. In situ surface‐enhanced infrared absorption spectroscopy shows that Au‐CeO x NSs with high Ce 3+ concentration promote CO 2 activation and *COOH formation. Theoretical calculations also indicate that the improved performance is attributed to the enhanced *COOH formation on Au‐CeO x NSs with high Ce 3+ fraction.

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