期刊
CHEMSUSCHEM
卷 12, 期 17, 页码 3988-3995出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201901330
关键词
CO2 reduction; electrochemistry; Fe/N/C; micropores; selectivity
资金
- National Natural Science Foundation of China [21573183, 91645121, 51801153]
- China Postdoctoral Science Foundation [2018M643697]
- Natural science basic research plan in Shaanxi province of China [2019JQ-419]
The electrochemical CO2 reduction reaction (CO2RR) in aqueous solution inevitably competes with the hydrogen evolution reaction (HER), which results in a difficult separation of the complex products. In this study, a Fe/N/C catalyst derived from Fe(SCN)(3) (labelled SMFeSCN) revealed a high CO Faradaic efficiency (FE) of 99 % at a moderate overpotential of 0.44 V. CO2RR and HER competed with each other for active sites on Fe/N/C. The high FE for CO production originated from the high content of micropores on the catalyst, which could suppress the side reactions by increasing CO2 uptake. More importantly, excellent tolerance towards metal-ion impurities was demonstrated in Fe/N/C, which was primarily owing to the high specific surface area with scattered active sites. Thus, the Fe/N/C catalyst showed good activity for CO2RR without influencing the electrolyte purity, thus raising the possibility of its practical application.
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