期刊
RSC ADVANCES
卷 7, 期 3, 页码 1376-1381出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra26868d
关键词
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资金
- Collaborative Innovation Center of Suzhou Nano Science and Technology
- National Natural Science Foundation of China [51422207, 51132006, 51572179, 21471106, 21501126]
- Specialized Research Fund for the Doctoral Program of Higher Education [20123201110018]
- Suzhou Planning Project of Science and Technology [ZXG2012028]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Electrochemical reduction of carbon dioxide (CO2) to methanol (CH3OH) catalyzed by transition metals has been proved feasible and effective in aqueous electrolytes. In this work, we introduce a FeS2/NiS nanocomposite electrocatalyst synthesized by traditional hydrothermal method, which selectively reduces CO2 to CH3OH with an unprecedented overpotential of 280 mV and a high faradaic efficiency up to 64% at the potential of -0.6 V vs. reversible hydrogen electrode (RHE). The FeS2/NiS nanocomposite electrocatalyst exhibits a stable current density of 3.1 mA cm(-2) over a 4 hour stability test. The high selectivity towards CO2 electroreduction to CH3OH may be attributed to the special ladder structure of the FeS2/NiS nanocomposite. The active sites are located at the interface between FeS2 and NiS which can effectively suppress the side reaction hydrogen evolution reaction and facilitate the CO2 reduction reaction.
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